Book 29 Truck Manual

Question 1

What is the systematic removal of heat, smoke, and fire gases from a structure and replacing it with cooler, clean, fresh air?

Answer 1

Ventilation

Question 2

Effective ventilation will accomplish what 4 objectives?

Answer 2

Saves lives
Assist in firefighter access
Controls the horizontal spread of fire
Reduces possibility of flashover and backdraft

Question 3

The removal of heated smoke and fire gases from a structure will increase the chances of survival to who?

Answer 3

Trapped or unconscious occupants

Question 4

A properly placed what aids in the removal of super heated smoke and fire gases from the building, which in turn permits firefighters to safely and more rapidly locate and extinguish the fire?

Answer 4

Ventilation hole

Question 5

Ventilation will also reduce the chance of what type of burns to firefighters from their hose stream?

Answer 5

Steam burns

Question 6

Rapid extinguishment of fire will also reduce what type of damages (reduces property damage)?

Answer 6

Water, heat and smoke

Question 7

Proper ventilation will also assist firefighters in fire extinguishment as well as what other operations?

Answer 7

Rescue, salvage, and overhaul

Question 8

In a structure fire, heat, smoke, and fire gases travel where to the highest point of the building, usually the roof or ceiling?

Answer 8

Upward

Question 9

Heat, smoke, and fire gases accumulating at the highest point and begin to bank down and spread laterally is known as what?

Answer 9

Mushrooming

Question 10

What in conjunction with an offensive heat hole, can help stop the horizontal spread of fire?

Answer 10

Strip ventilation

Question 11

What is a condition where all the contents of a room are heated to their ignition temperature?

Answer 11

Flashover

Question 12

Each year in the US there is an average 100 deaths to firefighters, on average how many of those deaths are due to flashover?

Answer 12

85

Question 13

What is it called if the structure’s contents reach their ignition temperature and there is not sufficient oxygen to support combustion, but occurs when oxygen is suddenly introduced?

Answer 13

Backdraft

Question 14

To remove backdraft conditions, what type of ventilation must be provided to release the heat, smoke, and gases?

Answer 14

Vertical ventilation

Question 15

What is the systematic removal of heat, smoke, and fire gases through wall openings such as doors and windows?

Answer 15

Horizontal ventilation

Question 16

What 2 methods are usually performed to accomplish horizontal ventilation?

Answer 16

Natural and positive pressure

Question 17

What ventilation is easily done by opening doors and windows and allowing the wind to ventilate the building?

Answer 17

Natural ventilation

Question 18

Natural ventilation is limited due the location of the fire in relation the structures openings and what direction?

Answer 18

Wind

Question 19

What ventilation is a method of forcing clean, fresh, pressurized air into a structure with blowers?

Answer 19

Positive pressure ventilation

Question 20

What ventilation is the opening of the roof or existing roof openings (skylights, hatch covers, etc.) for the purpose of allowing heat, smoke, and fire gases to escape from the structure into the atmosphere?

Answer 20

Vertical ventilation

Question 21

In order to properly and safely open a roof, you must have a good working knowledge of what?

Answer 21

Building construction

Question 22

The key to safe and effective roof ventilation is the knowledge of what?

Answer 22

Rafter type and direction

Question 23

Roofs built with conventional construction will usually withstand fire for a much greater length of time than what, resulting in a safer roof to operate on?

Answer 23

Lightweight truss construction

Question 24

With conventional construction, if time and safety permits, the roof team “WILL” cut a what directly over the fire?

Answer 24

Heat hole

Question 25

When operating on a lightweight truss roof (or suspected lightweight truss), the ventilation team shall never conduct ventilation operations directly over the what?

Answer 25

Fire

Question 26

Members should employ the practice of what so that they may complete their roof-cutting operation prior to the fire impinging on a given ventilation hole?

Answer 26

“Trading space for time”

Question 27

Rafter direction is important to know because we usually cut what size sheathing parallel to rafters?

Answer 27

1 x4 and 1 x 6

Question 28

On roofs sheathed with plywood, what cut is made perpendicular to rafters?

Answer 28

Head cut

Question 29

You need to know rafter direction in order to accomplish what types of holes?

Answer 29

Heat hole or strip

Question 30

Which type of hole is offensive?

Answer 30

Heat hole

Question 31

Which type of hole is defensive?

Answer 31

Strip

Question 32

What type of hole should be placed well ahead of the fire and extend the entire width of the building, creating a firebreak?

Answer 32

Strip

Question 33

What type of cut is a technique used when cutting plywood and 1 x 4 or 1 x 6 sheathed roof (4 cuts) and provides the largest hole with the minimum amount of cuts?

Answer 33

Center rafter

Question 34

Sheathing removal such as what technique requires minimal effort?

Answer 34

Louvering

Question 35

What is the material used to comprise the base and exterior covering for the roof and is attached to the rafters (wood sheathing, plywood type, corrugated metal)?

Answer 35

Decking

Question 36

Plywood sheathing is installed so that the 8’ dimension of the plywood crosses the rafters or joists and the 4’ dimension parallels the rafters or joists. The sheets of plywood are then staggered much like a brick or block wall, which require what type of nailing?

Answer 36

Diaphragm nailing

Question 37

What is a technique used to cut 1” x 4” or 1” x 6” solid, spaced, or diagonally sheathed roofs and are made parallel to rafters with no concern to locating rafters?

Answer 37

Dicing

Question 38

What are metal clips used to hold the butted ends of plywood together and are common on pitched roofs?

Answer 38

“H” clips

Question 39

What cut is a cut made through the roof decking that is made perpendicular to rafters, is used to locate rafters, rolling rafters and done on roofs with plywood or diagonal sheathing (first cut made on a center rafter cut)?

Answer 39

Head cut

Question 40

Constantly evaluate the effectiveness of the roof-cutting operation and weigh the what allowing for a timely and safe exit from the roof?

Answer 40

Risk vs gain

Question 41

The removal of sheathing is enhanced by a what motion with an appropriate tool (pick head axe) and more effective if the pulling tool is used near the rafters?

Answer 41

“J” hook

Question 42

What cut is a single cut made through the roof decking, the same width as the chain saw blade and used as an alternative to a smoke indicator hole?

Answer 42

Kerf cut

Question 43

Ground ladder should be thrown to uninvolved corners of the structure, the exception is what ladder?

Answer 43

Roof ladder

Question 44

For roof ventilation, a minimum of how many ladders should be thrown to the involved structure?

Answer 44

2 ladders

Question 45

What method is used for plywood once all 4 cuts have been completed due to the method plywood is nailed to the roof rafters?

Answer 45

Louver

Question 46

What are usually made from a 2” x 4” laid flat between rafters to provide a nailing surface for the edge of the plywood sheathing and found every 4 feet underneath a 4 x 8 sheet of plywood?

Answer 46

Nailing blocks

Question 47

What is a door leading from the interior stairwell to the roof and can be a quick way to clear smoke out of the stairwell and any hallway that is open to the stairwell?

Answer 47

Penthouse door

Question 48

What cut is a small triangular piece of roof covering (composition), which is removed from the roof to expose the roof sheathing and used to determine sheathing type and roof composition thickness?

Answer 48

Plug cut

Question 49

What is the normal and most common size of plywood?

Answer 49

4 x 8

Question 50

What cut is a light cut of the roof covering, usually composition only and is used to facilitate the removal of multiple layers of roofing material (composition?

Answer 50

Score cut

Question 51

What cut is a light cut made with the chain saw, cutting through the roof covering and plywood sheathing and used on a panelized roof when louvering off a purlin?

Answer 51

Skim cut

Question 52

Skylights are usually constructed of what material?

Answer 52

Glass or plastic

Question 53

Skylights will be placed over what on apartment buildings?

Answer 53

Hallways and stairwells

Question 54

Skylights will be placed over where on commercial buildings?

Answer 54

Manufacturing area

Question 55

What is a small triangular hole cut through the roof decking (sheathing and roofing material) made with the chain saw or an axe and used to indicate smoke and fire conditions?

Answer 55

Smoke indicator hole

Question 56

Smoke indicator holes should be placed along the path of access and egress how often?

Answer 56

Every few yards

Question 57

What is a technique used to assist the roof team to safely walk on a roof and helps determine roof conditions?

Answer 57

Sounding

Question 58

If ventilators are working correctly leave them in place, they are what percent more effective when the turbine is spinning?

Answer 58

30%

Question 59

What type of pipes can be constructed from ABS plastic, cast iron, or steel pipe?

Answer 59

Vent pipes

Question 60

If vents appear to be growing out of the roof (growing vent pipes), this indicates that the roof has what?

Answer 60

Sagged or dropped

Question 61

What is a series of cuts used to identify rafter direction only and is cut at a 45 degree angle toward or away from any exterior wall by intersecting a structural member and making the second cut parallel or perpendicular to exterior wall?

Answer 61

45 degree cut

Question 62

What 5 things will a 45 degree inspection cut tell you/.

Answer 62

Rafter type
Rafter direction
Sheathing type
Composition thickness
Smoke indicator

Question 63

For a 45 degree inspection cut, when the saw makes contact with a rafter, roll over the rafter and continue the cut approximately how many inches?

Answer 63

6 to 10 inches

Question 64

What is directional and always allows roof team to work back towards their ladder?

Answer 64

Dicing

Question 65

The chain saw operator should cut a minimum of how many dice cuts before the puller begins to remove sheathing?

Answer 65

3

Question 66

For dicing, locations of rafters are not required, what is?

Answer 66

Rafter type and direction

Question 67

Rafter type and direction can be accomplished with what diagnostics?

Answer 67

Plug cut, 45 degree inspection cut, and sounding

Question 68

The length of the dice cut is determined by the what of the tool being used to pull the sheathing (rubbish hook or pick head axe)?

Answer 68

Reach

Question 69

The chain saw operator should be aware of rafter spacing by not spanning how many rafters?

Answer 69

2 rafters

Question 70

For dicing, always leave a minimum of how many un-pulled sections between the cutter and puller?

Answer 70

1

Question 71

On a roof constructed with multiple layers of composition or diagonal sheathing, and additional what cut may be necessary?

Answer 71

Score or bottom cut

Question 72

In order to make a center rafter louver, you must know rafter type and direction and determine the location of how many rafters?

Answer 72

3

Question 73

When making a center rafter louver cut, you parallel cuts should be approximately how many inches inside the rafter?

Answer 73

2 to 3 inches

Question 74

Center rafter louver cuts against construction are started with a head cut going which direction in relation to your ladder to locate the first outside rafter?

Answer 74

Away from ladder

Question 75

Parallel cuts on a center rafter louver should be approximately how many feet long?

Answer 75

3 1/2 feet

Question 76

What 5 cutting operations can be made on a panelized roof?

Answer 76

Drop method
Pull back method
Offensive louver
Louver off a purlin
Lover off a main/lam beam

Question 77

When cutting on a panelized roof, cut how many inches inside of the purlins to avoid hitting metal hangers?

Answer 77

4 to 6 inches

Question 78

For a drop method, cut completely through 2 x 4 rafters from what to what?

Answer 78

Lam beam to lam beam

Question 79

For a drop method, first cut is made parallel to lam beam stopping at purlins, then cut small triangles to insert what tool?

Answer 79

Rubbish hooks

Question 80

Offensive louvers are done from what to what?

Answer 80

Lam beam to lam beam

Question 81

For louver off a main/lam beam, stand on the lam beam and reach out approximately how many feet and make first cut parallel to rafters from purlin to purlin?

Answer 81

3 1/2 feet

Question 82

Because of work area limitations while louvering off a lam beam, who must exchange tools?

Answer 82

Cutter and puller

Question 83

For louver off a purlin, start with a “skim cut” and reach out as far as you comfortable can approximately how many feet?

Answer 83

3 1/2 feet

Question 84

Louvering off a lam beam should be done from what to what?

Answer 84

Parapet to parapet

Question 85

Louvering off a purlin should be done from what to what?

Answer 85

Lam beam to lam beam

Question 86

New construction methods are usually not designed to assist what type of operations?

Answer 86

Fire suppression

Question 87

As architects reduce the mass and change the chemical composition of building materials, we are losing one of the most valuable factors which is what?

Answer 87

Time

Question 88

A working what of building construction not only provides the necessary expertise to conduct a quick and accurate size-up of a structure, it also provides the foundation for effective, timely, and safe operations?

Answer 88

Knowledge

Question 89

Structural integrity will determine what 4 factors?

Answer 89

Ladder placement
Forcible entry
Search and rescue
Ventilation feasibility

Question 90

The integrity of a working surface (i.e., roof and floor decking) must be evaluated for what?

Answer 90

Safe operations

Question 91

Special hazards such as what when considering ladder placement (i.e. strip malls) must be recognized and avoided?

Answer 91

Facades

Question 92

The direction of what (rafters/joists) must be determined prior to initiating ventilation to enhance safe and effective cutting operations?

Answer 92

Structural members

Question 93

The way we operate on a building is based off building construction, knowledge of this will dictate our approach, which 2 operations (modes) can be employed?

Answer 93

Offensive or defensive

Question 94

A plan of action can be formulated based off what factors for building construction?

Answer 94

Occupancy type, exposure, and involvement in arrival

Question 95

What is a mental evaluation that assists in determine a course of action and the methods necessary to accomplish a desired goal (estimate of situation)?

Answer 95

Size up

Question 96

What 3 operations consists of a size up?

Answer 96

Analyze the situation
Decide a plan (strategy)
Put the plan into operation (tactics)

Question 97

When “analyzing the situation” for your size up, type and construction of the building factors will indicate what 5 things?

Answer 97

Rate of burning
Possible avenues of fire spread
Problems on efforts to confine fire
Structural integrity
Time for safe operations

Question 98

When conducting a building size up, look past the exterior of a building and visualize what’s inside (strengths and hazard) by doing “what” with the building in your mind?

Answer 98

“Undress”

Question 99

For building construction, what 4 areas should our size up focus on?

Answer 99

Construction styles
Roof styles
Construction methods
Age of the building

Question 100

Conventional construction utilized what that depend on size for strength (does not rely on total sum of members)?

Answer 100

Structural members (size for strength)

Question 101

Conventional construction can be easily demonstrated by considering mill/timber construction and may be what dimension for strength?

Answer 101

8 x 8

Question 102

Lightweight construction (truss) is obtained from what that are in compression and tension?

Answer 102

Multiple members

Question 103

For lightweight construction, the strength of the individual structural member is dependent on the total sum of members, if how many members fail, others may fail?

Answer 103

1 member

Question 104

A single lightweight truss structural member can span how many feet and may be comprised of 2 x 4s in compression and tension to form an integral unit?

Answer 104

70 feet

Question 105

When the attic is exposed to fire, the rafters and roof may collapse on what thereby preventing collapse onto firefighting personnel below?

Answer 105

Ceiling joists

Question 106

A lightweight truss fable in a dwelling when exposed to fire will cause what to collapse as a unit into the structure, exposing firefighting personnel to falling, burning debris?

Answer 106

Top (rafters) and bottom chord (ceiling joists), and roof decking

Question 107

Lightweight construction utilized what size lumber as a standard?

Answer 107

2 x 3s and 2 x 4s

Question 108

Convention construction utilized what size lumber as a minimum and up to mill/lumber construction?

Answer 108

2 x 4s

Question 109

The ability to accurately estimate the amount of time that a structure can be considered structurally strong is dependent on what 3 factors?

Answer 109

Type of construction
Time of burning
Fire intensity

Question 110

What 6 different roof styles are there according to book 29?

Answer 110

Gable
Hip
Flat
Bridge truss
Arch
Sawtooth

Question 111

What style roof is a configuration of conventional or ordinary construction that consists of a ridge board and rafters that cross the outside walls?

Answer 111

Fable

Question 112

Rafters in a fable roof are usually what size or larger and are usually spaced 16 to 24 inches on center?

Answer 112

2 x 6

Question 113

Supporting of a gable roof is provided by what members?

Answer 113

Collar beams and ceiling joists

Question 114

Gable roofs are what type of configuration?

Answer 114

Semi flat to steep pitch

Question 115

Gable roofs can have rafters spaced up to how many inches on center for a steep pitched roof?

Answer 115

36 inches

Question 116

The ridge board on a gable roof is what size?

Answer 116

1 x 6

Question 117

Gable roofs without ridge boards resulting in 2 x 6 rafters placed on the roof how?

Answer 117

Butted together

Question 118

Lightweight construction utilizes 2 x 3 or 2 x 4 inch wood trusses held together by what type of connectors?

Answer 118

Metal gusset plate

Question 119

What are the 3 features of a truss system?

Answer 119

Top chord, bottom chord, and webbing

Question 120

The most common metal gusset plate is 18 gauge steel with prongs that produce what inch penetration?

Answer 120

3/8 inch

Question 121

Ceiling joists are typically what size or larger?

Answer 121

2 x 4

Question 122

Lightweight construction (truss members, open web, wooden I beam) may only be supported at which edges (unless used as a cantilever truss)?

Answer 122

Outside edges

Question 123

18 gauge “roof truss clips” may be found nailed to the bottom chord every how many trusses due interior wall partitions possibly not supporting the truss?

Answer 123

3 to 5 trusses

Question 124

For non supportive interior wall partitions, they could be classified as what?

Answer 124

“Free standing”

Question 125

Common on center spacing for truss rafters are how many inches?

Answer 125

24 inches

Question 126

Where are the strongest parts of a gable roof?

Answer 126

The ridge area (conventional with ridge board) and outside walls (where rafters cross)

Question 127

Gables without a ridgeboard or lightweight truss system (2 x 3 or 2 x 4 rafters) have a reduced what time and potential early failure rate and collapse of roof?

Answer 127

Burning time

Question 128

Newer roofs use what size plywood as decking instead of 1 x 4 or 1 x 6 inch space sheathing?

Answer 128

3/8 or 1/2 inch

Question 129

What else is used as decking in an effort to reduce building costs and can be more hazardous than plywood?

Answer 129

Particle, chip and strand board

Question 130

What type of building lacks the A-configuration and terminates in a “hip” configuration?

Answer 130

Hip roof

Question 131

For the hip roof, which rafters are utilized where 2 roof lines join together?

Answer 131

Valley rafters

Question 132

What size rafters and ridge boards are found on a hip style roof (conventional style)

Answer 132

2 x 6

Question 133

What is the typical spacing for a gable roof ?

Answer 133

16 to 24 inches, 36 inches for steep pitched

Question 134

What size “rough cut” rafters were also utlized in older wood frame structures with steep pitched gable roofs?

Answer 134

2 x 3 or 2 x 4

Question 135

What are the strengths of a hip style roof?

Answer 135

Ridge board, valley rafters, hip rafters, and areas where rafters cross outside wall

Question 136

If the roof is covered with what, the roof will become slippery when wet and offers minimal footing when dry and should be removed prior to ventilation operations?

Answer 136

Tile or other similar materials

Question 137

What type of roof is found on various types and sizes of commercial buildings primarily constructed during the 1930s and 1940s and easily identifiable by sloping ends?

Answer 137

Bridge truss

Question 138

Wooden truss members on bridge truss roofs are what size lumber?

Answer 138

2 x 12

Question 139

What is used on bridge truss roofs vertically for additional support?

Answer 139

Metal tie rods

Question 140

What size rafters are found on a bridge truss roof?

Answer 140

2 x 6 or larger

Question 141

What size of sheathing covers a bridge truss roof?

Answer 141

1 x 6 diagonal (post 33) or straight (pre 33)

Question 142

What type of decking was installed over existing straight or diagonal sheathing when modified for the earthquake ordinance?

Answer 142

Plywood

Question 143

Bridge truss roofs when exposed to fire, early collapse is not a primary concern, however the roof predictably fails how depending on type of fire?

Answer 143

In sections

Question 144

Strengths of a bridge truss roof are depending on the size of lumber utilized and that what of trusses?

Answer 144

Span

Question 145

The bottom chord of a bridge truss can be modified to allow storage in the what covered by sheathing or plywood and/or lath and plaster and can contribute to early collapse of trusses and roof?

Answer 145

Attic area or ceiling

Question 146

If a bridge truss roof has been modified for the earthquake ordinance, you must be aware of plywood and what else?

Answer 146

Metal straps and supports

Question 147

What type of roof is similar to a bridge truss and was built and popular in the 1930s, 1940s, and 1950s on both small and large commercials?

Answer 147

Bowstring Arch

Question 148

Bowstring arches have what size lumber that comprise the trusses and related members and may have multiple beams forming 1 truss arch?

Answer 148

2 x 12 or 2 x 14

Question 149

Rafters on a bowstring arch are what size?

Answer 149

2 x 6 or larger

Question 150

Bowstring arches are covered with what size diagonal or straight sheathing?

Answer 150

1 x 6

Question 151

How does a bowstring arch usually fail?

Answer 151

In sections

Question 152

What type of roof is an egg crate, geometric or diamond-pattern roof and supported by exterior buttresses or internal ties rods with turnbuckles?

Answer 152

Lamella arch

Question 153

Lamella arches are constructed with what size wood framing with steel plates and bolts at junctions of framing?

Answer 153

2 x 12

Question 154

What size roof decking/sheathing do lamella arches have?

Answer 154

1 x 6

Question 155

Lamella arches are common in what type of occupancies?

Answer 155

Gymnasiums, large buildings for recreational use, large supermarkets

Question 156

Total collapse of a lamella arch can occur if fire removes more than what percentage of the roof?

Answer 156

20%

Question 157

Total collapse of a lamella arch can result from what “effect”?

Answer 157

Domino effect

Question 158

What roof is similar to a bowstring or lamella arch that uses tie rods to offer lateral support for the walls of the building?

Answer 158

Tied truss arch

Question 159

Tie rods of what diameter with turn buckles (tension mantained) are used below each arch member to ensure arches do not push the exterior walls outward?

Answer 159

5/8 inch

Question 160

Tie rods on a tied truss arch may pass through exterior walls outside what, which facilitate identification of this style roof?

Answer 160

Plates

Question 161

Top chords of arch members on a tied truss utilize what size laminated lumber or larger?

Answer 161

2 x 12

Question 162

Rafter size on a tied truss arch are what?

Answer 162

2 x 10 or larger

Question 163

Tied truss arches utilize what size diagonal or straight sheathing?

Answer 163

1 x 6

Question 164

What is the primary hazard of a tied truss arch and may push the walls outward?

Answer 164

Tie rods and turnbuckles

Question 165

What type of roof is used on commercial buildings to yield additional light and ventilation for manufacturing type occupancies and is basically constructed the same today as it was during the 1930s and 1940s?

Answer 165

Saw tooth

Question 166

What size rafters on a saw tooth roof?

Answer 166

2 x 8 or larger

Question 167

Sawtooth roofs can be easily ventilated by utilizing the hinged what?

Answer 167

Panes of glass

Question 168

What size diagonal or straight sheathing are saw tooths covered with?

Answer 168

1 x 6

Question 169

Newer saw tooth roofs are covered with what size plywood?

Answer 169

1/2 inch

Question 170

Conventional flat roofs will have what size rafters?

Answer 170

2 x 6

Question 171

Newer style flat roofs are lightweight with what 3 types of construction options?

Answer 171

Wooden I beam, metal gusset plate truss, open web construction

Question 172

Flat roof rafter spacing is how many inches on center?

Answer 172

24 inches

Question 173

For newer conventional flat roofs, what size plywood are they covered with?

Answer 173

3/8 inch to 5/8 inch

Question 174

What type of lightweight member consists of top and bottom parallel wood chords that are connected by a wooden stem and is prefabricated at the factory before installation?

Answer 174

Wooden I beam

Question 175

What sizes are the dimensions for the top and bottom chord of a wooden I beam?

Answer 175

2 x 4, but 2 x 3 is common

Question 176

The stem for the wooden I beam is joined by a continuous glue edge joint that may be what size plywood or chip board?

Answer 176

3/8 inch

Question 177

What is the common on center spacing for wooden I beam?

Answer 177

24 inches

Question 178

Nailing blocks are spaced how far apart that are joined to the top chord of the wooden I beam/open web/metal gusset plate to provide an additional nailing surface for the 4 x 8 sheets of plywood?

Answer 178

4 feet

Question 179

For diaphragm nailing, the plywood sheets are placed so that the 8 foot dimension crosses the roofs what?

Answer 179

Structural members

Question 180

What is the strongest part of a wooden I beam roof?

Answer 180

Perimeter where the roof ties into exterior wall

Question 181

Common practice is to run what type of ducts of various sizes through the stems which removes a significant percentage of the stem and gives fire horizontal access to adjacent “I” beams, assisting the travel and spread of fire?

Answer 181

Heating and AC

Question 182

Ventilation personnel must be aware of what on a wooden I beam, open web, and metal gusset plate roofs when cutting between and parallel to the top chords?

Answer 182

Nailing blocks

Question 183

What construction consists of top and bottom parallel wooden chords that are cross-connected by steel tube web members, is prefabricated at the factory before installation, and is constructed with either parallel chord laid on edge or flat laid chords?

Answer 183

Open web

Question 184

The steel tube web members on an open web are what diameter cold rolled steel tubing?

Answer 184

1 to 2 inch

Question 185

The cold rolled steel tubing ends are pressed flat into a semicircular shape with a hole punched through the end and are inserted into slots with what size steel pins driven through chords and flat ends of webbing?

Answer 185

Up to 1 inch

Question 186

How far can a open web member span?

Answer 186

70 feet

Question 187

What size chords are on an open web?

Answer 187

2 x 4 or 2 x 3

Question 188

A single 2 x 4 chord on an open web up to 70 feet is made possible by joining different lengths in glued, mitered what?

Answer 188

“Finger Joints”

Question 189

What is common on center spacing for open web?

Answer 189

24 inches

Question 190

What type of member is predominantly 2 x 4 wood trusses that are held together by metal plate connectors?

Answer 190

Metal gusset plate

Question 191

What size plywood will be found on a metal gusset plate roof?

Answer 191

Common 1/2 inch, but also 3/8 inch

Question 192

What type of roof may be found on wood, masonry or concrete tilt up slab buildings?

Answer 192

Panelized roof

Question 193

What are the 4 major components of a panelized roof?

Answer 193

Beams, purlins, 2 x 4 inch joists, 2 inch plywood

Question 194

What is a common size lam beams?

Answer 194

6 x 36

Question 195

Beams on a panelized roof are supported at their ends by what?

Answer 195

Pilasters, wood or steel posts, or saddles

Question 196

How far are beams spaced apart?

Answer 196

12 to 40 feet

Question 197

Beams can be bolted together to provide lengths well in excess of how many feet?

Answer 197

100 feet

Question 198

What are supported by beams and installed on hangers spaced 8 feet on center?

Answer 198

Purlins

Question 199

What is a common size for purlins?

Answer 199

4 x 12

Question 200

What are beginning to be substituted for conventional purlins?

Answer 200

Metal gusset plates

Question 201

What is the hazard of the 2 x 4 rafters installed between the purlins, parallel to the beams?

Answer 201

Metal hangers

Question 202

What size plywood covers a panelized roof?

Answer 202

1/2 inch

Question 203

What are the strengths of a panelized roof?

Answer 203

Beams, purlins, and perimeter

Question 204

Expect weakening and/or collapse of what which are 4 inch hollow steep pipes that support this member in large portions of the roof under heavy fire conditions?

Answer 204

Beam span supports

Question 205

What type of foiling cover beneath panelized roof will give off flammable gases that rise and build up between the insulation paper and plywood decking?

Answer 205

Kraft paper

Question 206

If what are utilized for the purlins, consider additional and rapid failure when the roof is exposed to fire?

Answer 206

Lightweight trusses

Question 207

What type of members utilizes a popular building material (metal) in a wide variety of buildings, large and small?

Answer 207

Open web bar joist (steel bar joist)

Question 208

Top and bottom chords for open web bar joist are usually made of what inch steel?

Answer 208

1/8 inch

Question 209

Web supports on an open web bar joist are solid steel bar of what diameter?

Answer 209

5/8 inch

Question 210

Large buildings may have open web bar joists used as girders spaced up to how many feet?

Answer 210

45 feet

Question 211

Open web bar joists are spaced how many feet apart to accept corrugated metal decking covered by alternating layers of tar and tar paper?

Answer 211

8 feet

Question 212

Additionally, 4 x 8 foot sheets of ½ inch plywood with what size rafters are gaining popularity on open web bar joist roofs?

Answer 212

2 x 4

Question 213

What is the strongest part of an open web bar joist roof?

Answer 213

Perimeter

Question 214

Metal exposed to fire or sufficient heat will expand, twist and possibly fail, steel loses its strength around what degree?

Answer 214

1000

Question 215

What type of roof has a steel or wood sub structure covered by corrugated metal with an air-entrained mixture of sand, cement, and occasionally pea gravel is pumped on top of the corrugated metal decking?

Answer 215

Lightweight concrete roof (robertsons decking)

Question 216

Lightweight concrete roofs have 4 x 4 or 6 x 6 inch wire mesh to a thickness of how many inches?

Answer 216

3 to 4

Question 217

Lightweight concrete roofs are utilized when additional insulative properties are desired next to what?

Answer 217

Airport or freeways

Question 218

What are the strengths of a lightweight concrete roof?

Answer 218

Strong hard surface (structurally sound and resistant to fire)

Question 219

To ventilate a concrete roof, you will require which blades on the rotary saw?

Answer 219

Diamond blade or wood cutting carbide tipped blade

Question 220

Corrugated metal structures utilize wood or steel, covered with what 3 options of materials?

Answer 220

Corrugated steel, aluminum, fiberglass

Question 221

Roof ventilation on corrugated structures should be considered extremely what?

Answer 221

Dangerous

Question 222

Metal beam structures have a sub structure of steel beams, usually coated with a spray on what?

Answer 222

Fire retardant material

Question 223

Metal beam structures are finished with what options of materials?

Answer 223

Concrete, masonry, glass or similar materials

Question 224

Metal beam structures vary from how many stories?

Answer 224

2 stories to the tallest high rise

Question 225

What is a hazard for metal beam structures with glass paneling?

Answer 225

They could fall under fire conditions

Question 226

When exposed to sufficient heat, metal beams can expand how many inches per 100 feet which can push out walls?

Answer 226

9 inches

Question 227

What type of building is made of concrete slabs that have been raised into place to form exterior walls of a structure?

Answer 227

Tilt up

Question 228

Tilt ups can be up to how many stories?

Answer 228

5 stories

Question 229

One of the more popular building materials used in various types of buildings old and new is what?

Answer 229

Brick

Question 230

Brick buildings (pre 33) constructed up until the 1930s are commonly classified as what type of masonry?

Answer 230

Unreinforced masonry (URM)

Question 231

What does the mortar on a pre 33 building consist of?

Answer 231

Sand and lime (no cement)

Question 232

How thick are the walls on a pre 33 building?

Answer 232

13 inches

Question 233

Parapet walls on a pre 33 building can extend 3 feet above the roof line and how many feet or more if used as a facade on the front of the building?

Answer 233

5 feet or more

Question 234

How are the floor and joist systems set inside the exterior walls on a pre 33?

Answer 234

“Let”

Question 235

Roof and floor joists are what on a pre 33 so they would pull loose from the exterior walls during a fire and collapse into the interior of the building without pulling down the walls?

Answer 235

“Fire cut” (ends were cut with an angle)

Question 236

What revisions were made to pre 33 buildings after the long beach earthquake of 1933 (included on post 33 buildings)?

Answer 236

9 inch thick walls
Masonry walls required to be reinforced (steel rebar)
Rafters and joists anchored to walls
Cement utilized in mortar
Diagonal roof sheathing

Question 237

How were rafters and joists bolted to a masonry wall with metal hangers on post 33 buildings?

Answer 237

Ledger board

Question 238

What revisions were made to pre 33 buildings after the Tehachapi earthquake of 1959?

Answer 238

4 to 6 inch concrete bond beam cap on top of lowered parapet walls along public ways and exits
Parapet walls not higher than 16 inches with bond beam cap
Exterior walls drilled at roof rafter level and steel anchor bar/rod installed every 4 feet and attached to roof rafter

Question 239

Steel anchor bar/rods are secured to the exterior of the building by a plate/nut on a pre 33 after 1959 known as what which tied in the roof system to the walls?

Answer 239

Rafter tie plates

Question 240

What revisions were made to pre 33 buildings after the 1971 sylmar earthquake?

Answer 240

Anchoring walls to floor and roof systems (tie plates and steel bracing from parapet walls to roof structural members)
Strengthening roof construction with plywood (1/2 inch) and metal straps

Question 241

Concrete bond beams may also have been added to pre 33 buildings over windows and between what floors of multi story buildings?

Answer 241

2nd floor

Question 242

For pre 33 characteristics, deeply recessed window frames are “set” to the inside of the wall exposing about how many inches of brick return on the exterior of a building?

Answer 242

8 inches

Question 243

For pre 33 characteristics, windows may have arched or straight what?

Answer 243

Lintels

Question 244

For pre 33 characteristics, King rows will have 1 row of bricks laid “on end” every how many rows for additional strength?

Answer 244

4 to 7 rows

Question 245

What are the 7 characteristics of a pre 33 building?

Answer 245

Concrete cap
Rafter tie plates
Bond beam
Lintel
Shelf
Deep inset windows
King Row

Question 246

For pre 33, what is primary concern or hazard?

Answer 246

Wall, roof, and floor collapse

Question 247

For pre 33 bowstring and tied truss, the additional roof stability of plywood and metal straps can increase the potential for collapse of which walls?

Answer 247

Front and rear (primary danger)

Question 248

Due to the presence of arch roofs that have been modified as per the Earthquake Ordinance and floor/joists rafters that have been anchored to the walls, exterior walls may suddenly collapse (during fire conditions) outward a distance that is what?

Answer 248

Equal to at least the height of the wall

Question 249

The primary danger for pre 33 arch roofs are the front and rear wall, the secondary danger for collapse is what?

Answer 249

Side walls

Question 250

What are the 2 safest areas for pre 33 arch roofs that may fail?

Answer 250

Corners of a building
Distance at least equal to height of the walls

Question 251

Metal straps on roofs of buildings retrofitted for the earthquake ordinance can extend how many feet from wall?

Answer 251

3 to 4 feet (1/3 of the length of the building back from the front and rear walls running across width of roof as an additional requirement)

Question 252

What type of buildings are primarily concrete block that form the exterior walls, strong and extensively utilized?

Answer 252

Block

Question 253

What type of hazards are found on block construction?

Answer 253

Supporting of lightweight floor joists as well as fascades

Question 254

What type of construction can be used on new and old style buildings which covers the exterior walls for extensive remodel additions?

Answer 254

Wood frame stucco

Question 255

What are the hazards of wood frame stucco walls for vertical spread of fire if what type of construction is present?

Answer 255

Balloon

Question 256

A what can be defined as an identifiable style of construction on the exterior of a building that will conceal and spread the travel (extension) of fire, which is an external attic?

Answer 256

Facade

Question 257

Facades are used to conceal what on flat roofs?

Answer 257

Equipment and machinery

Question 258

What 4 areas should be considered when confronted with a facade?

Answer 258

Overhang
Facade height
Supporter or unsupported
Height from roof

Question 259

The size of a facade will have a direct effect on the what of a fire?

Answer 259

Area (what there is to burn)
Path of travel (extension)

Question 260

The extension of fire will be affected by the presence or lack of what within a facade?

Answer 260

Fire stops

Question 261

Facades are usually what in relation to an attic in a building?

Answer 261

Open or common

Question 262

If a facade is exposed to fire, expect the facade to collapse outward at least what of the overhang of the facade?

Answer 262

The distance

Question 263

For facade height, what to areas should be considered?

Answer 263

Roof line and laddering operations

Question 264

The structural stability of a facade will be enhanced if what by pillars, posts or other means that are often used for style of decoration?

Answer 264

Supported

Question 265

When laddering a building with a facade, ladder what portion?

Answer 265

One without facade

Question 266

Roofs that are lower than a facade utilize what for draining and is the actual roof line?

Answer 266

Scupper

Question 267

What on the walls of a building will also help identify the roof line with a facade?

Answer 267

Rafter tie plates

Question 268

What buildings were constructed in the 1920s, 1930s, and 1940s, and are primarily utilized homes?

Answer 268

Bungalow and balloon construction

Question 269

Bungalow and ballon construction is found single family dwellings and multi story habitational occupancies up to how many stories?

Answer 269

4 stories

Question 270

What type of construction does not utilize horizontal fire blocking in the walls and plates between multiple floors separating the attic from open vertical runs in the walls?

Answer 270

Balloon construction

Question 271

For bungalow and balloon construction, what size studs and rafters were commonly used?

Answer 271

Rough cut 2 x 4

Question 272

2 x 3 and 2 x 4 inch rafters for roof structural members and ridge board comprised of what size can also be found in bungalow and balloon construction?

Answer 272

1 x 6 (ridge board was optional)

Question 273

Prior to the use of conduit and romex, a pair of wires were run throughout a structure to provide electricity to the various rooms, wires were suspended on ceramic insulators and passed through ceramic tubes when necessary to pass through studs or plates, what type of wiring is this?

Answer 273

Knob and tube wiring

Question 274

When what type of wiring is exists, particular emphasis must be placed on eliminating the electrical service to the involved structure due to exposed wires?

Answer 274

Know and tube wiring

Question 275

What method has dramatically cut the time necessary to complete the multi-story and high-rise buildings by bolting pre-fabricated panels on the exterior of buildings?

Answer 275

Curtain construction

Question 276

Depending on the particular method that is employed, “curtain” construction can be about what percent faster than conventional construction?

Answer 276

60%

Question 277

Identification of curtain construction can be facilitated by what 2 things?

Answer 277

Pre fire planning and recognizing the “cube” or “smooth” look

Question 278

What 3 general time periods can be used to characterize a building?

Answer 278

Pre 1933, 1933 to late 1950s, 1950s to present

Question 279

Pre 1933 buildings will consist of what?

Answer 279

URM
Conventional roofs
Brick walls inclined to early collapse
Structures utilizing wood shiplap exterior, balloon and bungalow construction
Knob and tube wiring
Straight or diagonal decking

Question 280

1933 to late 1950s buildings will consist of what?

Answer 280

Solid construction in compliance with building codes
Straight or diagonal sheathing

Question 281

1950s to the present buildings consist of what?

Answer 281

Concrete tilt ups
Facades
Flat roofs with lightweight construction

Question 282

The presence of what type of construction must be identified and is accomplished by pre-fire planning, familiarity with a district, recognizing the style and age of a building, and proper communications between fireground personnel?

Answer 282

Lightweight construction

Question 283

Construction size and configuration directly effects what?

Answer 283

Fireground time

Question 284

The primary goal of effective ventilation operations is the reduction or removal of what 3 things from a structure enclosed area in a timely manner?

Answer 284

Smoke, heat, and fire gases

Question 285

Proper placement of blowers will assist in achieving what 5 things?

Answer 285

Assist in search, extinguishment, overhaul, and fire suppression
Reduce or eliminate products of combustion
Reduce interior temperature
Improve visibility
Increase safety
Reduce fire loss

Question 286

Plans for ventilation operations should behind by identifying the direction (horizontal or vertical) what must travel to exit contaminated area?

Answer 286

Contaminants

Question 287

What 2 methods are there to pressurize a a contaminated area to enhance or direct the travel of contaminants to the exterior?

Answer 287

Natural or mechanical ventilation

Question 288

What is easily accomplished by opening floors, windows, skylights, and other similar openings?

Answer 288

Natural ventilation

Question 289

Natural ventilation depends on what 6 factors?

Answer 289

Proximity of opening to contaminate removed
Ability of contaminants to travel unobstructed to ventilation opening
Number and size of ventilation openings
Direction of wind
Humidity
Temperature differential between interior and exterior of a building

Question 290

What method of ventilation is used by utilizing portable blowers by forcing the movement of contaminants to exit a pre selected and/or controlled opening?

Answer 290

Pressure ventilation

Question 291

The current methods that are utilized to provide pressurized ventilation with portable blowers are what 2 types?

Answer 291

Negative and positive pressure ventilation

Question 292

Which method of pressurized ventilation required placing the blower inside the building to exhaust the contaminants?

Answer 292

Negative pressure

Question 293

What are the 5 disadvantages of negative pressure ventilation?

Answer 293

Personnel exposed to contaminate to position blowers
Additional clean up and maintenance of blower
To be effective, blowers suspended utilizing straps, ladders, etc
Air flows normally in straight line from fresh air inlet to blower, limits flow of air in removing contaminants in top of room
Blocks doorways

Question 294

Which pressurized ventilation method requires the door to be opened and a blower is positioned outside the building forcing clean, fresh, pressurized air inside (similar to blowing a balloon?

Answer 294

Positive pressure

Question 295

The what will be equal at the top, bottom, and corners of the building common to the pressurized air?

Answer 295

Positive pressure

Question 296

Compared to negative pressure ventilation, positive pressure is approximately how many times as effective at removing contaminants from a building?

Answer 296

Twice

Question 297

The effective implementation of what method of pressurization is dependent on entrance opening, air flow between openings, exhaust opening, weather, training and communication?

Answer 297

Positive pressure

Question 298

Blower must be positions so that the what of air issued from a blower will completely cover the entrance opening to eliminate contaminants brings forced back through the “unsealed portions” of the entrance opening?

Answer 298

Cone

Question 299

Will opening multiple windows and/or doors facilitate a successful pressure ventilation operation?

Answer 299

No

Question 300

Exhaust opening can be selected to provide what direction to ventilate contaminated?

Answer 300

Either horizontal or vertical

Question 301

Positive pressure is most efficient when the exhaust opening is what size of the entrance opening?

Answer 301

3/4 to 1 3/4

Question 302

If a blower is being utilized and an exhaust odor is noticeable inside the building or area to be ventilated, this is an indicator that the what is not large enough?

Answer 302

Exhaust opening

Question 303

As in any ventilation operation, maximum efficiency can be obtained by utilizing the what direction to an advantage (windward to leeward)?

Answer 303

Prevailing wind

Question 304

Wind can be effective on positive pressure ventilation dependent on what?

Answer 304

Wind direction and velocity

Question 305

Positive pressure has proven effective against winds (leeward to windward) of up to how many mph?

Answer 305

25 mph

Question 306

A single blower should be positions so that the cone of pressurized air covers the entrance opening how much?

Answer 306

JUST

Question 307

Optimum placement of a blower is dependent on the size of the what and what of the blower?

Answer 307

Size of the opening and CFM of blower

Question 308

Smaller blowers need to be moved where in relation to the entrance opening?

Answer 308

Back

Question 309

Large blowers can be placed how far to the entrance opening to properly cover the opening with pressurized air?

Answer 309

Closer

Question 310

Tilting blowers at angles more than the manufacturer designed will result in lack of what to the crank shaft?

Answer 310

Lubrication

Question 311

Multiple blowers in series increase what?

Answer 311

CFM

Question 312

Multiple blowers in parallel provide more what of the opening?

Answer 312

Coverage

Question 313

For standard entrance opening maximum effectiveness is achieved by placing how many blowers in series (inline) with each other?

Answer 313

2 blowers

Question 314

Using 2 blowers in series increases the capacity of the blower in front by what percentage?

Answer 314

10%

Question 315

If 2 blowers of unequal CFM are used in series, place the larger blow about how many feet back from entrance and use the smaller blower behind large blower to cover entrance opening?

Answer 315

2 feet

Question 316

If the area in front an an entrance is limited to 3 to 4 feet (raised porch) place smaller blower in entrance and larger blower how many feet back from the door using larger cone to seal entrance?

Answer 316

3 to 4 feet

Question 317

How much more effective are blowers in parallel configuration than series configuration for a standard opening?

Answer 317

Less effective

Question 318

For large opening, blowers should be placed in what configuration because of their ability to cover larger openings with pressurized air?

Answer 318

Parallel

Question 319

If venting an area with no exit utilize how many blowers normally and if not effective utilize how many blowers to provide sufficient flow of air past the exhaust contaminants?

Answer 319

2 normally, 3 if not sufficient flow air past exhausting contaminants

Question 320

Effective ventilation required what of a contaminated area within a building?

Answer 320

Systematic ventilation

Question 321

Removing screens on windows prior to using these openings for ventilation purposes will increase the efficiency by what percent?

Answer 321

50%

Question 322

Which multi habitations occupancy may require creative techniques for smoke removal do to lack of ponet doors?

Answer 322

2 story center hallway apartments

Question 323

What type of blowers will produce considerably more cfm than the same size gasoline blowers and should be considered for metro rail tunnels, high rise, large underground parking structures, and very large commercial buildings?

Answer 323

Water powered blowers

Question 324

Depending on the fire, concentrations of carbon monoxide within the range of how many PPM are easily obtainable during overhaul operations?

Answer 324

500 to 1200 PPM

Question 325

500 PPM of carbon monoxide can be inhaled for how long without appreciable effects?

Answer 325

1 hour

Question 326

700 ppm of carbon monoxide inhaled for how long will cause some appreciable effects?

Answer 326

1 hour

Question 327

1200 ppm of carbon monoxide inhaled for how long is dangerous?

Answer 327

1 hour

Question 328

Concentrations of 4000 ppm of carbon monoxide and over at fatal in less than how long?

Answer 328

1 hour

Question 329

Measurements during actual overhaul operations have indicated that positive pressure can easily reduce carbon monoxide concentrations how many ppm to 130 to 220 ppm?

Answer 329

1000 ppm

Question 330

An 18 inch blower is adequate for an average how many square foot home?

Answer 330

2000 square feet

Question 331

If any fire does begin to accelerate or spread when using the blower, turn the blower hoe many degrees away from opening?

Answer 331

90 degrees

Question 332

Positive pressure should never be utilized in place of what and should always be used when personnel encounter hazardous atmospheres?

Answer 332

SCBA

Question 333

How many elevator manufacturers are there?

Answer 333

Over 60

Question 334

It is not uncommon for a single elevator to have features and special equipment offered by how many manufacturers, resulting in a wide variety of elevators with unique characteristics?

Answer 334

Several

Question 335

What 2 types of elevators are there?

Answer 335

Cable operated elevators and hydraulic elevators

Question 336

Cable elevators are sometimes referred to as what kind of elevator?

Answer 336

Electric elevator

Question 337

What type of elevator consist of a shaft, elevator car, cables, counterweights, vertical tracks, emergency safety brakes, and equipment room for electric motor and winding drum?

Answer 337

Cable elevator

Question 338

What 2 types of cable elevators are there?

Answer 338

Drum type and traction type

Question 339

What type of cable elevator is limited to 150 foot lifts and slow speeds with winding drum that have 1 or more cables that pass through it to a moving counterweight and attached to car and is no longer manufactured (more equipment, more space required)?

Answer 339

Drum type

Question 340

Where is the equipment room located for a drum type elevator?

Answer 340

Basement or roof

Question 341

What type of elevator is used for greater lifts and speed, use a traction sheave, cables attached to car and pass over traction sheave to counterweights?

Answer 341

Traction type

Question 342

Cables passing over the traction sheave unwind as fast as they wind and car speed is dependent on size of what along with the electric motor speed?

Answer 342

Traction sheave

Question 343

What 2 types of traction equipment are there?

Answer 343

High speed direct traction or gearless type traction
Geared traction type

Question 344

High speed direct traction or fearless type traction consists of a slow speed what type of voltage motor directly coupled to a traction sheave with a brake wheel mounted on the motor shaft?

Answer 344

Slow speed DC motor

Question 345

Geared traction type used a high speed motor, the motor is geared to a traction sheave through what type of gears with a brake wheel between the gears and motor?

Answer 345

Work gear

Question 346

Due to less weight, traction type elevator equipment rooms are located where?

Answer 346

On roof or above elevator shaft

Question 347

What type of elevator are generally limited to how many stories and use hydraulic power?

Answer 347

Hydraulic elevators

Question 348

Older hydraulic elevators are raised and lowered by a ram powered by what type of fluid to provide pressure?

Answer 348

Water

Question 349

Newer installations of hydraulic elevators use what type of pressure to power ram?

Answer 349

Oil pressure

Question 350

Some less modern hydraulic elevators that travel over how many stories may use cables and counterweights?

Answer 350

6 stories

Question 351

Equipment rooms for hydraulic elevators are normally located at lower level of building but can be at any floor level or how many feet away from shaft?

Answer 351

50 to 100 feet

Question 352

The equipment room for a hydraulic elevator will contain what?

Answer 352

Controller or relay panel (electronics)
Hydraulic power unit

Question 353

Reservoir supply, hydraulic pump, and valves to raise and lower car are all apart of what equipment in the equipment room for hydraulic elevators?

Answer 353

Hydraulic power unit

Question 354

What kind of elevator (cable and hydraulic) are designed to quickly move passengers to different levels within a multi story building?

Answer 354

Passenger elevators

Question 355

Passenger elevators are normally faster than freight elevators and are often used as what type of elevator that can not stop at all floors?

Answer 355

Express elevator

Question 356

What elevators are generally less complicated and are larger than passenger elevators?

Answer 356

Freight elevators

Question 357

Freight elevators can be as large as how many feet and have a carry capacity of 3 tons?

Answer 357

12 x 14 feet

Question 358

Freight elevators are generally separate from the main lobby and can have what 3 types of access?

Answer 358

Street, alley or loading dock access

Question 359

The door on the elevator car is referred to as what and travels with the car?

Answer 359

Inner or car door

Question 360

The door that is seen from the outside on each floor of the building is referred to as what door?

Answer 360

Outer or hoistway door

Question 361

Outer doors can be opened or closed by electric motors or what for emergency incidents?

Answer 361

Manually

Question 362

All types of doors are designed with a safety feature that will cause a car to stop whenever which door is opened?

Answer 362

Car door

Question 363

What 4 types of elevator doors are there?

Answer 363

Swing hall
Center opening
Single slide
2 speed

Question 364

For 2 speed doors one door moves how much faster than the other door so booth doors will meet concurrently in the open position?

Answer 364

2 speed

Question 365

Elevator doors are normally opened by a power unit that is located where where the elevator car is level with a floor landing?

Answer 365

On top of the car

Question 366

What contacts rollers on the hoistway door which released the door latch on the hoistway door?

Answer 366

Pick up arm (clutch, vane, bayonet, or cam)

Question 367

The bottom of the door is equipped with what made of various plastic or phenolic materials?

Answer 367

Gib blocks

Question 368

Gib blocks are how wide, high, and thick?

Answer 368

3” wide, 1” tall, 1/2” thick

Question 369

Gib blocks are installed every how many inches across the underside
Of the door panel?

Answer 369

18 inches

Question 370

Gib blocks provide stability to the hoistway door as it opens and closes, and can be expected to utilize how many gib blocks?

Answer 370

2

Question 371

A centrifugal force governor is provided on most elevators to guard against over speeding when the car travels in excess of what percentage of the top speed to stop device?

Answer 371

20%

Question 372

Safeties are installed where to provide positive emergency stopping when activated by the governor?

Answer 372

Bottom of elevator car and occasionally on counterweights

Question 373

On elevators capable of high speeds, what are forced between w jaws and the vertical rail is gripped with increasing force to slow a runaway elevator car to a gradual stop?

Answer 373

Wedges

Question 374

What 4 types of rescue procedures can be used to make an elevator rescue?

Answer 374

Moving an elevator
Adjacent car rescues
Forcing doors
Breathing elevator shafts

Question 375

When it has been determined that an occupant is trapped in an inoperative elevator, position personnel equipped with portable radios at what 2 locations?

Answer 375

Elevator equipment room and floor where elevator is inoperable

Question 376

When establishing communication with the occupants inside an elevator, have the trapped passengers verify the status of what button in the car?

Answer 376

Emergency stop button

Question 377

In the equipment room, personnel should verify if power is on or off to elevator by check what?

Answer 377

Electrical circuits (main switch and fuses)

Question 378

Occasionally circuits are tripped on an elevator due to what?

Answer 378

Overheating

Question 379

How long should you turn the power off to an elevator to recycle and reset the power?

Answer 379

30 seconds

Question 380

Do not attempt to rescue trapped passengers from an inoperative elevator unless what is disconnected?

Answer 380

Power to elevator

Question 381

Elevator doors on hydraulic elevators (some cable) will open if the elevator is how many inches above or below floor zone?

Answer 381

6 inches

Question 382

Elevator doors on cable elevators will open if elevator is within how many inches above or below floor zone?

Answer 382

18 inches

Question 383

How many valves are located in the hydraulic power unit to move the car?

Answer 383

3 (raise, lower, level car to floor landing)

Question 384

Most bleeder valves have a manual lowering screw built into the valve and are marked 1 of 3 ways?

Answer 384

ML, MAN, MANUAL

Question 385

When a inner car door is open and the outer door remains closed, instruct the passengers to the move the latching mechanism (metal rod) on the outer door in what direction?

Answer 385

Upward

Question 386

For a cable elevator rescue, how many members stay at the car and how many go to the equipment room?

Answer 386

1 at the car, 2 to the equipment room

Question 387

What 3 pieces of equipment should members take to the equipment room for a cable elevator rescue?

Answer 387

2 claw tools, pipe wrench (or large channel locks), chalk (to mark and show movement of hub)

Question 388

When moving an elevator, it is generally easier to move the car in which direction due to the counterweights?

Answer 388

Upward

Question 389

When an inoperative elevator shares a common shaft with an operational elevator, it is possible to do what from an adjacent elevator and should be used as a last resort?

Answer 389

Effect a rescue

Question 390

When doing a car to car rescue, position the operable elevator to the inoperable elevator and deactivate which button on both elevators?

Answer 390

Emergency stop button

Question 391

The top emergency exit panels are secured by what and are arranged so the cover can be opened from both the inside and outside of the elevator?

Answer 391

Thumb screws

Question 392

Does the emergency elevator cover open inward or outward?

Answer 392

Outward

Question 393

Frequently a what is provided in a metal box on top of the elevator which can be lowered through the exit opening after the cover is removed?

Answer 393

Rope or chain ladder

Question 394

Side emergency exits on elevators are usually what dimension?

Answer 394

16 inches wide, 5 feet high

Question 395

Side emergency exits open in which direction?

Answer 395

Inward

Question 396

Side emergency exits on elevators are held in place by how many fasteners so they can operated by from both inside and outside of an elevator?

Answer 396

4 fasteners

Question 397

The hinged emergency exit panel is provided with a lock arrangement so that it can be operated from what side of the elevator with a key kept on premises by person responsible for maintenance and operation of elevator?

Answer 397

Inside elevator car

Question 398

When performing a car to car rescue using side emergency exit doors use a short plank such as what through both cars?

Answer 398

Ladder

Question 399

What can be used to force open center opening doors when a patient is not stable?

Answer 399

Air bags

Question 400

For forcing elevator doors open? Insert a Hayward, crowbar, or other similar tool at which portion of the door enough to inset a small bag?

Answer 400

Top portion

Question 401

Removing gib blocks cannot be utilized when the inoperative elevator is located at what floor of the building?

Answer 401

Top floor

Question 402

For removing gib blocks, position personnel in the elevator room, floor landing where elevator is inoperative, and which other landing?

Answer 402

Floor above

Question 403

Access panels to blind shafts are located how often?

Answer 403

Every 3 floors or 80 feet apart

Question 404

When breaching an elevator shaft, the opening should be made on the what side of the shaft?

Answer 404

Elevator car door side

Question 405

Consider using the heavy rescue for wall breaching of an elevator, their jackhammers will go anywhere what size hose line will go?

Answer 405

1” hose line

Question 406

When breaching an elevator shaft, if necessary to use a ladder from the wall opening to the top of the car on a blind shaft, what should be considered for use on rescue personnel?

Answer 406

Life lines

Question 407

If life lines are used, consider use of what type of taskforce for any type of rope rescue?

Answer 407

USAR task force

Question 408

When a fire occurs in an elevator equipment room, the probably seat of the fire will be what?

Answer 408

The driving motors

Question 409

Whenever possible use of water on elevator equipment should be avoided or what?

Answer 409

Used sparingly

Question 410

For elevator shaft fires, the main source of fuel is debris in the what?

Answer 410

Put

Question 411

Due to the 1971 earthquake in Sylmar and the 1994 northridge earthquake, over how many elevators were put out of service due to initial shock and aftershocks?

Answer 411

1000 elevators

Question 412

What consists of steps, a driving motor, and gearing to form a continuous belt or track running on a set of gears?

Answer 412

Escalators

Question 413

An escalator traveling between 90 to 120 feet per minute can carry as many as how many passengers per hour?

Answer 413

5000

Question 414

For escalators, by clearing all escalator of all passengers, the treads can be moved backward by what pressure?

Answer 414

Hand pressure (older installation use crowbar or similar tool)

Question 415

When cover plate on escalator is removed, the plate screws should be completely removed from the plate and plate lifted in what direction rather than backwards or away from victim?

Answer 415

Straight up

Question 416

Part of an elevator shaft that is 3 or more consecutive floors has no hoistway doors to access the floors and is known as what?

Answer 416

Blind section

Question 417

What type of elevator is an elevator car that has no hoistway doors to access 3 or more consecutive floors?

Answer 417

Express elevator

Question 418

How long are pick up arms generally on a hydraulic elevator?

Answer 418

14 inches

Question 419

How long are pick up arms on a cable elevator generally?

Answer 419

36 inches

Question 420

Water covers about how much of the earths surface?

Answer 420

2/3

Question 421

Water is the what of every community, and is necessary to supply water for domestic usage and fire protection considerations?

Answer 421

Life blood

Question 422

Supply systems supply water to distribution systems, supply systems are what types?

Answer 422

Gravity or pump or both

Question 423

What water supply system used a source from lakes of reservoirs that are high elevation than the municipality?

Answer 423

Gravity system

Question 424

The pressure of water to a distribution system is determined by what of the source above the area of usage?

Answer 424

Elevation

Question 425

100 feet in height will create how much pressure of what?

Answer 425

43 psi (.433 psi per foot of elevation)

Question 426

What type of water supply system is provided when the source of water is below or same level of municipality?

Answer 426

Pump systems

Question 427

The city of LA used a combination system (gravity and pump) to supply an average of how many gallons of water per day to 4 million people?

Answer 427

600 million gallons

Question 428

What percentage of LAs water is supplied from 2 aqueducts from Sierra Nevada?

Answer 428

75%

Question 429

What percentage of LAs water is supplied from wells within the SFV?

Answer 429

15%

Question 430

What percentage of LAs water is supplied from the metropolitan water district (MWD) which supplies water from the Colorado river and state water project (Sacramento and feathers river)?

Answer 430

10%

Question 431

Pipelines within a what system can be classified as truck lines, main lines, service and customer lines?

Answer 431

Distribution system

Question 432

Trunk lines vary water from a primary source and can vary from how many inches to feet inside (constructed from iron or concrete)?

Answer 432

36 inches to 10 feet

Question 433

Mains normally run beneath a street and parallel to a curb and vary from how many inches in size (iron pipe)?

Answer 433

2 to 72 inches

Question 434

Mains can be cross connected to form what which allows shutting down a specific main within a distribution system for repairs?

Answer 434

Loop

Question 435

Water is delivered to individual structures by a combination of what lines?

Answer 435

Service and customer lines

Question 436

Service lines that run between a main and water meter can vary between how many inches in size (iron, copper, or galvanized pipe)?

Answer 436

1/2 inch to 12 inches

Question 437

Customer lines run between water meter and structures and can vary between how many inches in size (iron, copper, galvanized, or plastic)?

Answer 437

1/2 to 12 inches

Question 438

Water utility companies are normally responsible for maintenance and repair of a water distribution system including what 2 parts on the service/customer side?

Answer 438

Water meter device and shut off valves on either side of water meter

Question 439

Building owners are normally responsible for maintenance and repair of what plumbing?

Answer 439

Plumbing from output side of water meter and plumbing inside of structure

Question 440

Type and size of water service to a structure is determined by plumbing code requirements and consumption needs that result in what 3 water service configuration?

Answer 440

Domestic water only
Domestic water and water for fire protection through a single service
Domestic water and water for fire protection through separate services

Question 441

What systems are comprised of shut off valves, water meters and detector check valves, and pressure reducing valves?

Answer 441

Water service system

Question 442

What is often a centerpiece of lid that can be utilized to remove the cover?

Answer 442

A meterbox, vault, or manhole

Question 443

The centerpiece or lid normally identifies the type of utility with “WATER”, “DWP”, “LA WATER”, “LA DWP WATER”, or “CITY WATER METER” and are often marked with what color paint?

Answer 443

Blue

Question 444

Shut off valves (service, curb valves) are what 2 types of valves?

Answer 444

Non indicating and indicating valves

Question 445

What valves do not indicate open or closed and are ball or cone valves and gate valves?

Answer 445

Non indicating valve

Question 446

For non indicating valve, when closed, the valve-nut is what direction to the valve?

Answer 446

Perpendicular

Question 447

A ball or cone valve has what type of valve-but attachment on top of the valve?

Answer 447

Rectangular

Question 448

A gate valve is a non rising stem valve that has what type of valve-nut attachment at the top of the valve stem?

Answer 448

Square

Question 449

What types of valves indicate open or closed and are identified by OSY and Y valves and post indicator valves (PIV)?

Answer 449

Indicating valve

Question 450

What in the service or customer system is used to calculate water usage?

Answer 450

Water meters

Question 451

What in the service or customer system is used to allow the flow of water in 1 direction only?

Answer 451

Check valves

Question 452

Water meters are normally directly adjacent to shut off valves and vary in size from what inch?

Answer 452

1/2 to 10 inches (inlet-outlet size)

Question 453

Water meters are used to calculate water usage for what type of water service?

Answer 453

Domestic

Question 454

Compound meters are used to calculate water usage for domestic water services that can use what flows?

Answer 454

Low and high water flows

Question 455

A compound meter operated as a standard what for low water flows?

Answer 455

Water meter

Question 456

For high flows, what type of valve opens and allows the passage of large flows that are metered separately on a compound meter?

Answer 456

Check valves

Question 457

Compound meters are how many inches of larger and normally found directly adjacent to shut off valves?

Answer 457

4 inches or larger

Question 458

What type of valve and meter set are used to supply water for a closed fire protection system?

Answer 458

Detector check valve with bypass meter

Question 459

A what opens and allows water to flow straight through unmetered in a detection check valve with bypass meter?

Answer 459

Check valve

Question 460

Detector check valves can vary in size from how many inches?

Answer 460

2 to 10 inches

Question 461

Most detector check valves will use a small what in parallel with the check valves to detect leaks and unauthorized use of water?

Answer 461

Water meter

Question 462

What type of service has a domestic water meter and a detector check valve providing separate water services?

Answer 462

Combination water service

Question 463

A combination water service (water meter and check valve) may be located in the same vault or what?

Answer 463

Separate in adjacent vaults

Question 464

Pressure reducing valves used in domestic services reduce pressure, dwellings commonly use what psi?

Answer 464

40 to 80 psi

Question 465

In warm climates, water meters can be placed where?

Answer 465

Just below grade

Question 466

In warm climates, pressure reducing valves, shut off valves, and detector check valves can be located where?

Answer 466

Above or below grade

Question 467

Domestic water services will normally consist of what inch single water meter with shit off valve on one or both sides of meter in single family dwellings?

Answer 467

1/2 to 2 inch

Question 468

Water service for a domestic sprinkler system will normally be what size detector check valve that is located in a separate vault?

Answer 468

2 inch

Question 469

Hotels domestic water has what size water meter?

Answer 469

4 to 6 inch

Question 470

A hotels water for fire protection will have what size detector check valve?

Answer 470

4 to 8 inch

Question 471

Domestic water service will normally consists of what size customer lines and water meter with a shut off valve on 1 or both sides of a meter for apartments?

Answer 471

1 to 3 inch

Question 472

Water service for fire protection will vary between how many inches in apartments?

Answer 472

2 to 4 inches

Question 473

The water services for domestic water and fire protection are in what vaults located below or above ground?

Answer 473

Separate

Question 474

A common alternative to a single 1 to 3 inch water meter in an apartment is a what size equivalent water service?

Answer 474

3 inch

Question 475

The alternative 3 inch water meter in apartments consists of 2 what size water meters in adjacent vaults that are connected to a single 3 inch customer line?

Answer 475

2 inch

Question 476

If an apartment has dorthy Mae sprinkled, a separate what size fire service vault is used?

Answer 476

2 inch

Question 477

Water services to commercials depend on what requirements of a structure?

Answer 477

Water requirements and not size of structure

Question 478

A commercial occupancy with multiple occupancies such as a strip mall can be serviced with single water meter for domestic or by multiple what size water meter in separate vaults?

Answer 478

1 to 2 inch

Question 479

Multiple water meters in separate vaults that supply domestic water to a commercial is known as a what?

Answer 479

Battery

Question 480

Detector check valves will be what size for fire protection in separate vaults than domestic for a commercial?

Answer 480

2 to 4 inches

Question 481

High rise domestic and fire protection are provided by what type of service?

Answer 481

Combination (in the same vault)

Question 482

The water meter is what size in a high rise?

Answer 482

4 to 10 inches

Question 483

Detector check valves for fire protection in a high rise will be what size?

Answer 483

4 to 12 inches

Question 484

What type of sprinkler system has water in system at all times and when head is activated water immediately flows from activated heads?

Answer 484

Automatic wet pipe system

Question 485

Water is supplied by gravity tank, pressure tank, automatic fire pump or a water service system in what 3 sprinkler systems?

Answer 485

Automatic wet, automatic dry, and deluge system

Question 486

What sprinkler system has compressed air in pips and when head is activated, air is immediately released causing water to enter system to activated heads?

Answer 486

Automatic dry pipe system

Question 487

What type of sprinkler system has dry pipes at all times and required fire department apparatus to pump water into FDC to supply water to activated heads?

Answer 487

Non automatic system

Question 488

What type of sprinkler system may be open or closed and are supplied with water by heat actuated valves?

Answer 488

Deluge system

Question 489

When closing a ball, cone, or gate valve that is how many inches of larger, it may be necessary to exercise a valve to completely eliminate the flow of water as valves become encrusted with rust and scale?

Answer 489

3 inches or larger

Question 490

Occasionally a shut off valve may be encountered with a sign that says “life support machine in area” or “shut gate system divide”, do not turn them off unless what is obtained?

Answer 490

Appropriate approval

Question 491

If a stubborn cone valve is encountered, slightly loosen the but and the bottom of the valve and strike the threaded shaft with a what?

Answer 491

Hammer

Question 492

Do ball valves have a nut on the bottom of the valve?

Answer 492

No, cones do

Question 493

All shut off valves should be closed and opened slowly to avoid what?

Answer 493

Water hammer

Question 494

Shutting off water leaks that are located outside of structures are normally limited to leaks in mains, service lines or customer lines and normally handled by who?

Answer 494

Utility company personnel

Question 495

Leaks in customer lines between a water meter, detector check valve, and structure are normally handled by who?

Answer 495

Fire service personnel

Question 496

What PPE is recommended for sheared hydrants?

Answer 496

Helmet, goggles, turnouts or rain gear

Question 497

How large is the painted blue cap for the hydrant gate valve?

Answer 497

6 inches

Question 498

How many turns may be required to shut off a sheared fire hydrant?

Answer 498

18 to 26 turns

Question 499

Approximately what percent of the hydrants in LA will shut off in a clockwise direction?

Answer 499

98%

Question 500

The fire hydrant gate valve is normally found in direct line with the fire hydrant and perpendicular to what?

Answer 500

Curb

Question 501

When notifying MFC of a sheared hydrant, what 3 thing must you include in your message?

Answer 501

Fire hydrant location
State of hydrant has been shut off
Number of valves operated

Question 502

MFC notify who is a sheared hydrant?

Answer 502

DWP water operating trouble board

Question 503

Pure natural gas is odorless, for leak detection odorant is added so that as little as what percent of natural gas can be detected?

Answer 503

1%

Question 504

The common odorant that natural gas is laced with is what, which is used in a solution of 1 pint per million cubic feet of gas?

Answer 504

Mercapitan/thiophane mix

Question 505

Natural gas is non toxic and not considered hazardous in small concentrations, however large amount do what and asphyxiation can occur?

Answer 505

Displaced oxygen

Question 506

Natural gas is lighter or heavier than air?

Answer 506

Lighter

Question 507

Butane and propane are heavier or lighter than air?

Answer 507

Heavier

Question 508

Natural gas has an ignition temperature of what degree?

Answer 508

1100 degrees

Question 509

Natural gas has a flammable range between what percentages?

Answer 509

4% and 14%

Question 510

Most natural gas is initially distributed through over how many miles of transmission lines from Texas, Kansas, New Mexico, Oklahoma, Arizona and the Rocky Mountain area?

Answer 510

30,000 miles

Question 511

Transmission lines maintain pressures up to what psi?

Answer 511

1000 psi

Question 512

Natural gas is generally distributed by a combination of what?

Answer 512

Transmission lines and distribution mains

Question 514

Natural gas is distributed to customers from the gas company through what?

Answer 514

Distribution mains

Question 515

Service lines comes from distribution mains and do not exceed what psi?

Answer 515

60 psi

Question 516

The pressure at the meter set assembly (MSA) is reduced to low pressure which is approximately what psi?

Answer 516

1/3

Question 517

Distribution mains are made of what material?

Answer 517

Polyethylene

Question 518

Older existing distribution mains are made of what but rare to find?

Answer 518

Steel or copper

Question 519

Polyethylene mains are color coded to identify the pipe as transporting natural gas and are what color for the national color code for newer installations?

Answer 519

Yellow

Question 520

Older installations of plastic pipe can be what colors?

Answer 520

Pink (salmon beige) or orange

Question 521

Polyethylene will have what running the length of the pipe, for locating plastic gas lines below ground?

Answer 521

Wire

Question 522

Above ground gas lines must be made of what and cannot be plastic?

Answer 522

Steel

Question 523

What are normally located underneath city streets, parallel to curbs, under grassy parkways, between the curb and sidewalk, and occasionally alleys?

Answer 523

Distribution mains

Question 524

Where are 4 places MSAs can be located?

Answer 524

Outside structure (outside set)
Underneath structure, stairs (underneath set)
Vault underneath sidewalk (curb meter box)
In an enclosure (cabinet) on exterior of structure (cabinet set)

Question 525

Transmission lines bring natural gas into Southern California and vary in diameter from how many inches?

Answer 525

12 to 36 inches

Question 526

MSAs can be categorized into what 3 categories?

Answer 526

Residential, industrial, multiple gas meter

Question 527

The basic what consists of piping, shut off valve, and gas meter?

Answer 527

MSA

Question 528

The pipe rising vertically from the ground, close to exterior wall of a structure going into MSA is called a what?

Answer 528

Riser

Question 529

The first fitting from a riser is a shut off valve called a what?

Answer 529

Stopcock or service cock

Question 530

A ring on a stop cock valve indicates what?

Answer 530

Branch service

Question 531

A flat washer on a stop cock valve indicates what?

Answer 531

Service line is plastic inserted inside older metal pipe

Question 532

A band on the stop cock valve indicates what?

Answer 532

Service line is plastic

Question 533

A flat circular device on the riser is a what and reduces the medium 60 psi pressure to a low pressure of 1/3 psi?

Answer 533

Regulator

Question 534

Shut off valves can be located by finding what since they are always adjacent to each other?

Answer 534

MSA

Question 535

Look for a what that is either chiseled or painted on the curb, which marks the location where the service line passes beneath the curb and indicates which side of the building the MSA is located?

Answer 535

“G”

Question 536

A “G” is required to be chiseled or painted on the curb by who?

Answer 536

CalOSHA

Question 537

MSAs and shut off valves are normally located on an outside wall of the structure, easily accessible to who that reads the meters for billing purposes?

Answer 537

Gas company personnel

Question 538

If an MSA is not visible along an outside wall, it will be found in 7 other locations?

Answer 538

Crawl space under building
Beneath outside staircase
Outdoor cabinet (condos)
Underground garage
Sidewalk or parkway vault on side of building
Basement (shut off valve accessible from outside)
Subsurface in parkway or sidewalk

Question 539

Some MSAs may be equipped with an emergency vibration-sensitive shut off device known as what type of valve?

Answer 539

Earthquake valve

Question 540

Earthquake valves are marketed by private industry and are normally found on what side of the MSA?

Answer 540

Discharge side (right side)

Question 541

Earthquake valves may be shut off by doing what to shut of the flow of gas in the event of a damaged or frozen stop cock only?

Answer 541

Swift kicking earth quake valve

Question 542

To reset earthquake valve, turn the reset button how many turns?

Answer 542

1/4 turn

Question 543

What type of MSA is larger than a residential MSA due to the increaed flow (volume) of gas necessary?

Answer 543

Industrial MSAs

Question 544

Industrial MSAs are a curb valve and what can be used to control the flow of gas in the service main?

Answer 544

Curb valve extension handle

Question 545

Industrial shut of valves, known as what valves, are used for high pressure applications?

Answer 545

Nordstrom valves

Question 546

Some nordstrom valves have gate valves with wheel handles that may be turned in what direction to close?

Answer 546

Clockwise

Question 547

Industrial applications can use how many regulator in series to regulate gas pressure?

Answer 547

2

Question 548

What meter is used instead of a conventional MSA to regulate high pressure and handle quick surges?

Answer 548

Rotary meter

Question 549

Meters under a sidewalk are called what meters and common in commercial areas with the lid made of lightweight concrete or fiberglass set in a metal frame?

Answer 549

Curb meters

Question 550

Multiple habitational or commercial occupancies are often equipped with multiple what, which provide a master stopcock and a separate meter and stopcock for each unit?

Answer 550

MSAs

Question 551

Who is required to identify the individual MSA’s, as to which unit or building they serve. If the identification has worn away, notify them to have the meters properly marked?

Answer 551

Gas company

Question 552

In some commercial areas, multiple structures may be commonly serviced by a single service pipe called a standard service main and is identified by what that it is a branch line?

Answer 552

Metal ring

Question 553

In a branch service, the occupancy how far away from the supply main is a standard service while the other occupancies are branch services?

Answer 553

Further from supply main

Question 554

To turn off the flow of gas, turn the tang what direction the flow of gas and to the pipe?

Answer 554

Crosswise

Question 555

Tangs can be easily turned with what tool?

Answer 555

Crescent wrench

Question 556

If the tang is stuck do not apply too much pressure, who is recommended to service a stuck tang?

Answer 556

Gas company

Question 557

Stuck tangs can be approached in what type of conditions by the fire department?

Answer 557

Emergency

Question 558

For a stuck tang, use how many wrenches?

Answer 558

2 wrenches

Question 559

For a stuck tang, place 1 wrench on the backing nut and 1 on the tang, loosen the backing nut how many turns?

Answer 559

1/4 turn

Question 560

If backing nut is loosened too far, the core can fly out, leaking medium press gas of what psi?

Answer 560

40 to 60 psi

Question 561

Newer stop cocks have what driven into the backing nut and bolt and cannot be loosened?

Answer 561

Pin

Question 562

Once the backing nut is loosened tap it with what, freeing the core?

Answer 562

Non-metallic hammer

Question 563

Turn the tang 1/4 turn to stop the flow of gas, how many turns will continue to let gas flow?

Answer 563

1/2 turn

Question 564

Once the core is free, tighten the backing nut to lock the core in what position?

Answer 564

Off

Question 565

The tang on a Nordstrum valve can only be turned how many turns, in either direction, ensuring the “ON” and “OFF” positions are easy to locate

Answer 565

1/4 turn

Question 566

Curb valves are also referred to as what?

Answer 566

Emergency shut off valve

Question 567

Curb valves can be installed in addition to what at public assemblies such as school, hospitals, churches, etc and are normally located near the property line, by a sidewalk?

Answer 567

Stopcocks

Question 568

Some industrial meters are equipped with a gate valve that has a wheel handle to what type of indicating valve?

Answer 568

OS AND Y

Question 569

Curb valves are how many feet underground and under a small metal, concrete or fiberglass lid with “Gas Company” markings in raised letters?

Answer 569

2 to 3 feet

Question 570

What tool can be used to lift the lid on a curb valve by inserting it in the hole?

Answer 570

Common utility tool or screwdriver

Question 571

If the lid is stuck to gain access to a curb valve, insert the point of what tool in the hole and apply the proper leverage?

Answer 571

Pickhead axe

Question 572

Curb valves are ordinary gate valves with what type of handle?

Answer 572

“Faucet” type handle

Question 573

If the curb valve is too deep to reach with the hand, what type of key can be used for extra reach?

Answer 573

Sprinkler key (utility shut off tool)

Question 574

Natural gas emergencies can be divided into what 3 categories?

Answer 574

Inside leaks, outside leaks, leaks resulting in fires

Question 575

Of the 3 types of gas leaks, which is the greatest danger due to potential for ignition and explosion?

Answer 575

Inside leak

Question 576

What is the first priority upon arrival on the scene of a reported gas leak?

Answer 576

Safety

Question 577

A faint whiff of gas or a leak which has “what” for the past few days may allow more leeway to perform a leak examination as opposed to heavy odor of gas?

Answer 577

“Come and gone”

Question 578

For faint odors, always check the condition of what as a first action?

Answer 578

Pilot lights

Question 579

What can be used to check suspected areas to confirm a presence of a leak?

Answer 579

Soapy water

Question 580

Sometimes, turning the appliance valve near the problem how many turns, the leak can be stopped leaving the rest of the premises unaffected?

Answer 580

1/4 turn

Question 581

In multi-meter service occupancies, additionally the service pipe coming through the slab prior to the MSAs, there will be a master valve called what which stops the flow to all tenants in the building on the service pipe?

Answer 581

Isolation valve stop cock

Question 582

Multiple MSAs are referred to as what?

Answer 582

Header

Question 583

For inside leaks avoid operating what by turning them ON and OFF due to cause of sparking?

Answer 583

Electrical switches

Question 584

For inside leaks also avoid walking on what in dry weather to prevent sparks from static eletricity?

Answer 584

Carpets

Question 585

If it is determined to be unsafe to enter a structure due to a leak, turn off gas meter, spot apparatus in safe zones, and establish a water supply to prepare for what operations?

Answer 585

Fire suppression

Question 586

Outside leaks are often where?

Answer 586

Gas service pipe or other underground lines into buildings or manholes

Question 587

Gas that travels through the ground tens to deoderize as what filters out the odorant?

Answer 587

Soil

Question 588

For outside leaks, call who because they can only shut down transmission or distribution lines?

Answer 588

Gas company

Question 589

The fire departments role at the site of an outside gas leak is what?

Answer 589

Public safety

Question 590

For outside gas leaks, place apparatus upwind of the leak and away from what that contain trapped gas?

Answer 590

Manhole covers, storm drains, or structures

Question 591

How long can it take the gas company to shut off gas in a large, high pressure pipeline?

Answer 591

Several hours

Question 592

The only sure way to safely check suspected areas of gas leaks is to use what?

Answer 592

Combustible gas indicators

Question 593

Currently which companies carry equipment that can be used to detect the presence of natural gas and its LEL?

Answer 593

Hazmat companies

Question 594

The gas company used to teach its members a technique known as the what for controlling the flow of gas in small diameter pipes but is not against the gas companys policy?

Answer 594

Bend-back method

Question 595

Crimping plastic pipes is acceptable as long as all tools used to work on plastic pipes are what?

Answer 595

Grounded

Question 596

Redwood plugs can be driven into various diameter steel pipes with what?

Answer 596

Rubber mallet (Wooden, rubber, plastic or brass)

Question 597

Redwood plugs do not work on what type of piping?

Answer 597

Polyethylene pipe

Question 598

Pipelines on rare occasions can contain hazardous contaminats such as what?

Answer 598

Polychlorinated biphenyls

Question 599

The gas company states that its product is what percent free from impurities?

Answer 599

97%

Question 600

Whenever a gas travels through piping, it can create what type of charge on the pipe?

Answer 600

Static electric

Question 601

Fog down plastic gas pipes with a wetting agent such as what to prevent ignition from static electricity which will add an adhesive quality to water that helps insure that a static charge cannot form?

Answer 601

Wet water

Question 602

Some plastic pipes are equipped with a what that is used to help work crews locate the pipe from above ground and does not provide an electrical chage?

Answer 602

Wire

Question 603

What are the 4 considerations for a natural gas fire?

Answer 603

Protect exposures
Let gas burn until supply is shut off
Control evacuation and maintain site security
Notify gas company

Question 604

Small gas fires can be extinguished with what if necessary, approach fire at shut off valve?

Answer 604

Dry chemical or CO2 extinguisher

Question 605

For large gas fires, what type of stream can be used to approach any valves?

Answer 605

Fog stream

Question 606

What is the cylinder inside a stopcock that allows or blocks the flow of gas, it is connected to the tang and rotated by turning the tang and held in place by a backing nut?

Answer 606

Core

Question 607

What toxic gas that, on rare occasions, is present in leaks at natural gas compressor stations or at underground storage fields?

Answer 607

Hydrogen sulfide

Question 608

What is a meter that serves more than one unit, e.g., an apartment complex or mobile home park called?

Answer 608

Master meter

Question 609

The air rescue cushion is composed of how many cells?

Answer 609

2, larger upper cell and small lower cell

Question 610

Each cell on the rescue air cushion is inflated by a separate blower through a what?

Answer 610

Air tube or sock

Question 611

The cushion comes with 2 how many horsepower electric blowers?

Answer 611

1/2 horsepower

Question 612

What 3 sources can the electric blowers be connected to for a power source?

Answer 612

Truck on board generator, portable generator, and 110 supply (house current)

Question 613

The department has how many rescue cushions?

Answer 613

24

Question 614

How many rescue cushions are rated for 100 feet and 70 feet?

Answer 614

6 rated at 100 foot and 18 rated at 70 feet

Question 615

The rating of the air cushions reflect the height of what person?

Answer 615

Jumper

Question 616

The 24 air cushions have replaced how many life nets carried by truck companies?

Answer 616

47

Question 617

The assignment for a jumper incident consists of what companies?

Answer 617

1 BC
1 TF
1 ALS RA

Question 618

If an air cushion is needed, it must be specifically asked by who and the closest task force with an air cushion will be added?

Answer 618

IC

Question 619

Fire station 2, 11, 17, 85, 27, 37, 48, 50, 60, 63, 64, 69, 70, 72, 26, 93, 94, 98 all carry which rated air cushion?

Answer 619

70 feet

Question 620

Fire stations 10, 20, 58, 88, 95, and recruit training carry which rated air cushion?

Answer 620

100 feet

Question 621

What 2 situations will confront rescuers with a jumper incident?

Answer 621

Fire or industrial accident and potential suicide victim

Question 622

Every attempt must be made by the rescuers to break through what barrier and gain cooperation of the victim when confronted with a jumper in a fire or industrial situation?

Answer 622

“Fear barrier”

Question 623

For a suicide jumper, the fire department will work under the direction of who to mitigate the emergency?

Answer 623

Police department

Question 624

For a suicide jumper, rescuers should attempt to confine the jumper to what area if possible to reduce the size of the target area on the ground?

Answer 624

Small area

Question 625

The air rescue cushion is comprised of 2 separate cells, are they completely sealed off from each other?

Answer 625

No

Question 626

Air passes from lower small cell to larger upper cell by way of what between the 2 in the air cushion?

Answer 626

Small vent

Question 627

Which cell on the air cushion absorbs most of the energy generated by an impact?

Answer 627

Upper cell

Question 628

Where are the breather ports located on the air cushion which air dissipates out of from the upper cell?

Answer 628

Side and front

Question 629

The amount of air released from the air cushion is regulated by what over the breather ports?

Answer 629

Elastic cord tie

Question 630

For a former air cushion, the cord must be what so less air is released?

Answer 630

Tighter

Question 631

Does the lower cell on the air cushion have a breather port?

Answer 631

No

Question 632

The lower cell has how much more energy absorbing capability of the upper cell?

Answer 632

Twice

Question 633

Which cell provides the safety margin for the air cushion and determines the limiting height from which a person may safely fall?

Answer 633

Lower cell

Question 634

The air cushion is able to absorb and dissipate the energy of impact in less than how many seconds?

Answer 634

1/6 of a second

Question 635

What is the air cushion constructed with?

Answer 635

Vinyl reinforced fabric, fire retardant and water proof

Question 636

The tear strength of the material on the air cushion is over how many psi?

Answer 636

50 psi

Question 637

The seams of the air cushion are seen with what type of thread which is stronger than the material of the cushion

Answer 637

Heavy duty nylon thread

Question 638

If the air cushion is torn or punctured during an operation, will it seriously affect its capability?

Answer 638

No

Question 639

If the air cushion inches minor damage, what will easily compensate for the additional loss of air?

Answer 639

The electric blowers

Question 640

What 2 factors is the air cushion rating based on?

Answer 640

Max floor height and ability of person falling to properly hit the target

Question 641

The maximum floor height a person may fall is based on how many feet per floor with the person landing on the buttocks or back on the air cushion?

Answer 641

10 feet

Question 642

A person landing on the buttocks or back on the air cushion is safely below the human tolerance level as per who in “human tolerance to shock”?

Answer 642

US Air Force

Question 643

Air cushion and blowers should be moved to what area when setting up and not in target area?

Answer 643

Pre deployment area

Question 644

For suicide jumpers, the air cushion should be set up out of what?

Answer 644

View

Question 645

What are hazards that can damage the air cushion?

Answer 645

Sprinkler heads and broken glass

Question 646

Of the 3 sources of power to supply the electric blowers, which is the preferred source?

Answer 646

Truck on board generator

Question 647

The Onan on the truck has the capability of running how many blowers simultaneously?

Answer 647

2 blowers

Question 648

Portable generators carried by truck companies does not have the capability of starting how many blowers at the same time?

Answer 648

2 blowers

Question 649

The use of what is desirable (remote power sources) that add the advantage of reducing noise levels at incidents and aiding in communications?

Answer 649

110 AC power source

Question 650

As a last resort what else can be used to inflate the air cushion?

Answer 650

Portable gas blowers

Question 651

What are the 2 negatives when using gas blowers to inflate air cushion?

Answer 651

Significant amount of noise and produces
Carbon monoxide which causes long term degenerated effects to the material on air cushion

Question 652

The air cushion will full inflate in less than how many seconds?

Answer 652

20 seconds

Question 653

When the air cushion is inflated, walk around air cushion and insure that the breather port flanges are what?

Answer 653

Straight

Question 654

Drop bags should be attached to the eye of each corner of the cushion, a pre cut drop cord of how many feet works well?

Answer 654

6 feet

Question 655

The person falling into the air cushion should be instructed to fall as if they were what causing the person falling to land on the small of their back?

Answer 655

Sitting down

Question 656

If 2 people must fall at the same time into the air cushion, they should do what with each other tightly from the moment they jump until impact?

Answer 656

Hug each other

Question 657

If 2 people jumping into the air cushion fall how far apart, injury may occur?

Answer 657

Fraction of a second

Question 658

The air cushion will reinflate in how many seconds?

Answer 658

20 seconds

Question 659

Always have how many persons observing operation for reinflation and to direct movement of the air cushion?

Answer 659

1 company member

Question 660

When breaking the air cushion down, fold the air cushion into a width that will allow it to fit on the what?

Answer 660

Carrier

Question 661

When rolling the air cushion, roll it towards the what to allow residual air to be forced out of the air cushion?

Answer 661

Socks

Question 662

Never store the air cushion while what?

Answer 662

Wet (allow it to dry)

Question 663

For air cushion incidents (Task force) who is responsible for safety, supervised deployment, controls timing of jumper, ensures cushion is fully inflated and is the liaison with LAPD and IC?

Answer 663

TFC

Question 664

For air cushion incidents (task force) who is responsible for primary (portable generator) and secondary (fixed electrical) power sources and deploys lighting to target area at night?

Answer 664

AO

Question 665

For air cushion incidents (Task force) who is responsible for assisting in moving air cushion to target area and assist in deployment of air cushion?

Answer 665

Tiller, top, inside, nozzle and hydrant member

Question 666

For air cushion incidents (Task force) who is responsible for assisting in moving air cushion to target area, police target area for hazards, insure air rescue cushion is fully inflated, supervised deployment of air cushion in pre deployment area, coordinates movement of equipment?

Answer 666

Engine captain

Question 667

For air cushion incidents (Task force) who is responsible for assisting in deployment of blowers to target area, attaches blowers to sock, controls electric blower movement in coordinating with air cushion?

Answer 667

Engine engineer

Question 668

For air cushion incidents (Task force) who is responsible for assisting in deployment of blowers to target area, attaches blowers to sock, controls electric blower movement in coordinating with air cushion and moved 2 18 inch gas blowers to target areas as back up air source?

Answer 668

Pump engineer

Question 669

What 2 times should the air cushion be inspected?

Answer 669

After use and monthly

Question 670

Each air cushion comes with what for minor cuts and tears?

Answer 670

Repair kit

Question 671

If the stitching comes apart, can the air cushion be patched on a seam?

Answer 671

No

Question 672

The air cushion can be cleaned with what and should only be done if absolutely necessary to allow it to dry?

Answer 672

Cold water and deck brush

Question 673

For major damage and stitching coming apart at seams, the air cushion must be sent to who for repairs?

Answer 673

S and M

Question 674

What are the dimensions for the 70 foot (model 70A) air cushion?

Answer 674

15’x20’x8’ rated for 7th floor

Question 675

How much does the 70 foot air cushion weigh?

Answer 675

190 pounds

Question 676

How much does the 70 foot air cushion cost?

Answer 676

6,000

Question 677

What are the dimensions for the 100 foot (model 100A) air cushion?

Answer 677

20’x50’x9’, rated for 10th floor

Question 678

How much does the 100 foot air cushion weigh?

Answer 678

360 pounds

Question 679

How much does the 100 foot air cushion cost?

Answer 679

8,500

Question 680

What power is required for both air cushions in voltage AC?

Answer 680

115 V AC

Question 681

What size electric blowers power the 70 foot air cushion?

Answer 681

2 20” blowers 1/2 HP, 60 HZ

Question 682

What size electric blowers power the 100 foot air cushion?

Answer 682

1 20” and 1 24”, 1/2 HP, 60 HZ

Question 683

How long is the 1/2 static kernmantle life line, white in color with blue or red stripes stored in the red bag (mainline)?

Answer 683

300 feet

Question 684

How long is the 1/2 static kernmantle lifeline, orange in color, stored in an orange bag (belay line)?

Answer 684

200 feet

Question 685

How many class 3 harnesses (large) are carried on an engine company?

Answer 685

2

Question 686

How many class 3 harnesses (1 small/medium, 2 large) are carried on a truck company?

Answer 686

3

Question 687

How many 8mm 20’ LRHs are carried for the 2 line rope system?

Answer 687

2

Question 688

How many stainless steel brake bar racks, with 6 aluminum bars are carried in the 2 line rope system?

Answer 688

2

Question 689

How many carabiners are carried in the 2 line rope system?

Answer 689

8

Question 690

How many 8 mm 6 foot and 5 foot accessory cord are carried in the 2 line rope system?

Answer 690

2 of each

Question 691

How many blue 1” tubular webbing, 5 feet in length are carried in the 2 line rope system?

Answer 691

2

Question 692

How many yellow 1” tubular webbing, 12 feet in length are carried in the 2 line rope system?

Answer 692

2

Question 693

How many red 1” tubular webbing, 20 feet in length are carried in the 2 line rope system?

Answer 693

2

Question 694

How many inspection record sheets (F-975) are carried in each bag?

Answer 694

1

Question 695

How many 2”x7’ anchor strap with D rings at both ends are carried in the 2 line rope system?

Answer 695

1

Question 696

How many pieces of yellow multi-poop webbing, 3 foot in length are carried in the 2 line rope system?

Answer 696

2

Question 697

What percentage of the load is carried on (kern) core for the 1/2” static kernmantle rope?

Answer 697

90%

Question 698

What is the 1/2” kernmantle rope rated at?

Answer 698

10,000 pounds

Question 699

How much does the 1/2” kernmantle rope weight per 100 feet?

Answer 699

7 pounds

Question 700

The 1/2” kernmantle rope meets what NFPA standard for 1 and 2 person rescues?

Answer 700

1995

Question 701

What known as the rated breaking strength of the rope when pulled in a straight line, with no knots, under laboratory conditions to a point where it can be excoriated to break?

Answer 701

Tensile strength

Question 702

What will reduce the tensile strength of rope?

Answer 702

Age of rope and knots

Question 703

To determine the safe working load of a rope, you divide the manufacturers rated tensile strength by the NFPA safety factor of what?

Answer 703

15

Question 704

What is the working load of the 1/2” kernmantle rope?

Answer 704

666 pounds (10,000 divided by 15), exceeds NFPA standard of 600 pounds for a 2 person rope

Question 705

The best way to remove dirt particles from a rope is to place rope in what and placing it in washing machine on gentle cycle in cold water?

Answer 705

Mesh bag of pillow case

Question 706

What 3 approved cleaners can be used to wash lifeline rope?

Answer 706

Lifeline cleaner, ivory snow, or woolite

Question 707

Rope ends should be swapped end to end how often to reduce wear on the most used part of the rope?

Answer 707

Annually

Question 708

When ropes and software are not in use, store them in a cool dry location away from direct exposure to what due to UV radiation?

Answer 708

Sunlight

Question 709

Protect ropes and software from extended contact with what 4 types of chemicals?

Answer 709

Alkaline, oxidizing agents, bleaching compounds, and acids

Question 710

Static kernmantle rope has a melting point of what degree?

Answer 710

450 degrees

Question 711

What are the 3 approved markers for lifeline rope?

Answer 711

Carter’s MARKS-A-LOT, stanford SHARPIE, and binney-smith MAGIC MARKER

Question 712

What does 1 strip and 2 strips mean when marking lifeline rope?

Answer 712

1 strip is for odd years, 2 strips is for even years

Question 713

When are the 4 times the F-975 should be logged?

Answer 713

When receiving it, training, emergency incidents, monthly checks

Question 714

During monthly checks if any problems encountered call who and be guided by their direction?

Answer 714

USAR 88

Question 715

What 5 things do you inspect the lifeline rope for?

Answer 715

Sheath is abraded, fuzzy, exposing core
Rope is lumpy or hard
Rope has hourglass shape
Rope comes in contact with chemical
Rope has been shock loaded

Question 716

Rope can be damaged if left on floor due to what?

Answer 716

Concrete contains acid and stepping on rope grinds in dirt

Question 717

Rope can be damaged from wet or damp areas because it promotes growth of what?

Answer 717

Mold and mildew

Question 718

Stepping on or dragging the rope on ground will contaminate it with what which can work into core and damage fibers?

Answer 718

Dirt and grit

Question 719

One of the most convenient ways of storing, transporting and protecting lifeline rope is in what?

Answer 719

A bag

Question 720

Lifeline rope should be secured to the bottom of the bag by tying what knot?

Answer 720

Figure 8 stopper

Question 721

What are the 4 advantages of using lifeline rope inside of a bag?

Answer 721

Rope can be flaked faster than coiling
Protects rope from damage
Rope pays out if worn for rappelling
Rope is easy to deploy

Question 722

What type of webbing is constructed of single layer of material similar to ladder straps, less expensive, stiffer and more difficult to work with than tubular webbing?

Answer 722

Flat webbing

Question 723

What 2 types of tubular webbing is there?

Answer 723

Edge stitched and spiral weave (shuttle loom)

Question 724

Of the 2 types of tubular webbing, which one is the standard in rope rescue operations?

Answer 724

Spiral weave

Question 725

The 1” tubular webbing is rated at how many pounds?

Answer 725

4000

Question 726

What is accessory 8 mm nylon cord rated at to make LRHs and prusik loops?

Answer 726

3630 pounds

Question 727

“D” shaper carabiners are rated at how many pounds?

Answer 727

9000 pounds

Question 728

What are the 4 basic parts of a carabiner?

Answer 728

Spine, hinge, gate, latch

Question 729

The “D” shaped carabiner is designed to carry the load along what side?

Answer 729

Spine

Question 730

What 3 things should you never do to a carabiner?

Answer 730

Never tighten using channel locks
Never re-tighten under a load
Never side load a carabiner

Question 731

Carabiners should be placed in a system so that the gate is where and gravity keeps the unlocking screw closed?

Answer 731

Bottom

Question 732

What equipment is the preferred friction device among vertical cavers and rescue teams?

Answer 732

Brake bar racks

Question 733

How many aluminum bars are attached to the brake bar rack?

Answer 733

6

Question 734

The welded eye on the brake bar rack is rated at how many pounds?

Answer 734

10,000 pounds

Question 735

The rope is woven through the brake bar rack starting with the large bar that has what type of groove manufactured in it?

Answer 735

Training

Question 736

If the rope is woven through the bars incorrectly in the brake bar, and a load is applied to safety check it, what will the bars do?

Answer 736

“Pop” off and release rope

Question 737

For a single person load (rappel or lower) start with how many bars?

Answer 737

4

Question 738

For a 2 person load, start with how many bars?

Answer 738

5

Question 739

The maximum bars to be used in an operation on a brake bar is 6, what is the minimum?

Answer 739

3

Question 740

One method of adjusting the amount of friction in the system while using the brake bars is controlled by what?

Answer 740

Sliding bars on rack

Question 741

Tying off the brake bar rack required how many half hitched after wrapping the rope twice over the yoke?

Answer 741

2

Question 742

How often should checks be made of the welded eye of the brake bar rack and to ensure the rack is not bent?

Answer 742

Periodic

Question 743

The aluminum bars in the brake bar should be checked how often?

Answer 743

Routinely

Question 744

What frictioning/lowering/rappelling device comes with or without ears, tend to twist the rope during use, and once on the rope it is difficult to increase friction?

Answer 744

Figure 8 plate

Question 745

Rappelling or lowering operations over how many feet require a brake bar rack to be used due to twisting of the rope?

Answer 745

75 feet

Question 746

What are used to reduce friction on turns and allows you to build mechanical advantage systems?

Answer 746

Pulleys

Question 747

The strength of the rope is restored fully when placed over a turn of a pulley that is at least how many times the diameter of the rope?

Answer 747

4 times

Question 748

Pulleys can have what type of side plates with single or double sheaves?

Answer 748

Stainless steel or aluminum

Question 749

What 2 types of pulleys does the LAFD use?

Answer 749

2 1/2 aluminum prusik minding pulley and 4 inch stainless steel

Question 750

For the class 3 harnesses, the rear strap support should be adjusted to the middle of the back, just below what?

Answer 750

The shoulders

Question 751

For the class 3 harnesses, how many types of rear strap supports are there?

Answer 751

2, 1 with “D” ring for fall support and 1 with just back support

Question 752

What are the small loops used for on the waist of the class 3 harness?

Answer 752

Attachment for extra equipment (webbing and carabiners only), WILL NOT SUPPORT YOUR WEIGHT

Question 753

The straps for the class 3 harness should be secured by the keepers, if keeps brake off how can the straps be secured?

Answer 753

Electrical tape or tie off with overhand knot

Question 754

What is the proper tightening order for the straps on the class 3 harness?

Answer 754

Waist first, legs second, chest third

Question 755

When connecting the main and belay line, which line goes to the waist and which line goes to the chest on the class 3 harness?

Answer 755

Main to waist, belay to chest

Question 756

Main and belay line should be connected to the class 3 harness by what knot with a carabiner?

Answer 756

Figure 8 on a night

Question 757

If you do not have a carabiner to connect to the class 3 harness, what 2 knots can you use?

Answer 757

Figure 8 follow through or bowline backed up with a double overhand knot

Question 758

What efficiency is measured by the percentage of rope strength that remains after a knot is tied on the rope?

Answer 758

Knot efficiency

Question 759

Many of the knots used in the departments rope rescue systems belong to what family of knots?

Answer 759

Figure 8

Question 760

What knot can be used to tie off knots in webbing (seat harness) and in making other knots?

Answer 760

Overhand knot

Question 761

What knot can be used to make a double half hitch or single half hitch?

Answer 761

Half hitch

Question 762

What knot is used to create a load releasing hitch and supply friction in all types of rope systems?

Answer 762

Munter hitch

Question 763

What knot has a variety of uses to secure webbing/rope to an anchor and secure a nozzle using a drop bag?

Answer 763

Birth hitch/larks foot

Question 764

What knot is used in many applications such as securing an extinguisher or crow bar?

Answer 764

Clover hitch

Question 765

What knot is also a stopper knot, recommenced for the end of a throwbag, lifeline and drop bag and has a 75% knot efficiency?

Answer 765

Figure 8 stopper knot

Question 766

What knot is used to tie the end of a rope around an anchor and has an 80% knot efficiency?

Answer 766

Figure 8 follow through

Question 767

Which knot is on a bight and created a loop at the end of the rope for attaching anchors, hardware, and other ropes with the use of a carabiner and has an 80% knot efficiency?

Answer 767

Figure 8 on a bight

Question 768

What knot is used to tie 2 ropes of the same size together and has an 80% knot efficiency?

Answer 768

Figure 8 on a bend

Question 769

What knot is strong and has 2 loops to reduce wear and strength loss from the rope bending around the carabiner by splitting the load between 2 loops and has an 80% knot efficiency?

Answer 769

Double figure 8 on a bight

Question 770

Accessory cord is made from
Nylon kernmantle rope and ranges from what millimeters in diameter?

Answer 770

6 mm to 10 mm

Question 771

When using accessory cord for prusik loops, the cord used should not be less than how many inches or more than 2/3 the diameter of the rope it is to be tied on?

Answer 771

1/2 inch

Question 772

The LAFD used what size prusik loops (accessory cord) on all 1/2 inch static kernmantle rope?

Answer 772

8 mm

Question 773

What knot is used to tie 2 ends of accessory cord together to create a prusik loops, a good knot for attaching 2 equal or unequal diameter ropes together, used to back up bowlines, and has an 80% knot efficiency?

Answer 773

Double overhand bend or “double fisherman”

Question 774

The prusik on the main line acts as a what?

Answer 774

Brake

Question 775

The tandem prusik (2 prusik) on the belay do what?

Answer 775

Arrest a fall

Question 776

When placing the prusik on a lifeline, wrap it how many times?

Answer 776

3

Question 777

What knot is used to join 2 pieces of webbing together and has a knot efficiency of 65%

Answer 777

Water knot

Question 778

What knot is use to put a loop in the end of a length of webbing but can set very tight, making it difficult to untie?

Answer 778

Overhand loop

Question 779

What knot around any anchor point requires at least 3 wraps, has 100% knot efficiency?

Answer 779

Tensionless hitch or “no knot”

Question 780

When using a no knot, the rope should not cross over itself when wrapped, if anchor is above the load, the rope be should spiral wrapped up with the standing end where in case the load has to be lowered slightly?

Answer 780

At the top

Question 781

What knot should be backed up with a double overhand knot for safety and has a 65% knot efficiency?

Answer 781

Bowline

Question 782

What knot is used to tie a loop in the middle of a rope in situations where the ends of the rope may also be carrying a load and has a 75% knot efficiency?

Answer 782

Butterfly knot

Question 783

What type of hitch is utilized by the LAFD constructed of 8 mm accessory cord and is 20 feet long, designed to act as a shock absorber when main and belay line are shock loaded or to pass knots through the system?

Answer 783

Load releasing hitch (LRH)

Question 784

When making the LRH, take the 2 bitter ends and tie an overhand knot in them, leaving how long of a tail?

Answer 784

2 inch

Question 785

After making the Munter hitch on the LRH, pull slack on rope through the Munter hitch until carabiners touch, pull carabiners apart until Munter hitch flips over, how big should the space be between the carabiners?

Answer 785

4 to 5 inches

Question 786

For the LRH, how many wraps between the carabiners?

Answer 786

3 to 6 times

Question 787

When using a class 2 harness, what other harness should also be used?

Answer 787

Chest harness

Question 788

To tie a chest harness, use a piece of 1” tubular webbing approximately how many feet in length?

Answer 788

10 to 14 feet

Question 789

Can the main and belay line share the same anchor if it is bomb proof?

Answer 789

Yes, but must be attached by separate piece of webbing

Question 790

When considering if an anchor is bomb proof, compare it to measuring up to department what?

Answer 790

Apparatus

Question 791

Pockets are 1 inch round steel stacks and should be how many feet in length?

Answer 791

3 feet

Question 792

Pickets are pounded 2 feet into the ground at what degree away from the object?

Answer 792

15 degrees

Question 793

General guidelines were developed by who for loading picket anchor systems in “average” loamy soil?

Answer 793

US Army

Question 794

How many pounds is a single picket rated at?

Answer 794

700

Question 795

How many pounds is a 1-1 picket system rated at?

Answer 795

1400 pounds

Question 796

How many pounds is a 1-1-1 picket system rated at?

Answer 796

1800

Question 797

How many pounds is a 2-1 picket system rated at?

Answer 797

2000

Question 798

How many pounds is a 3-2-1 picket system rated at?

Answer 798

4000

Question 799

What type of PPE is required for the 2 line rope system?

Answer 799

Brush jacket, helmet, eye protection, and gloves

Question 800

What are the minimum members needed for a 2 line rope system operation?

Answer 800

4, one rescuer, one main line tender, one belay tender, one technical safety officer

Question 801

The Munter hitch on the LRH hitch goes towards what?

Answer 801

The anchor

Question 802

When tending to the belay line, the lead hand holds the belay line and puts what type of turn in the line?

Answer 802

“Z” turn

Question 803

Commands during a lowering operation are given by the member in charge which could be who?

Answer 803

TSO, rescuer, or member put into that position

Question 804

When working within how many feet to the edge, you must be tied off?

Answer 804

5 feet

Question 805

If you must see over the edge without a rope, do what and look over?

Answer 805

Crawl up slowly on your stomach

Question 806

Who shall inspect and approve all system components prior to starting any operation with ropes?

Answer 806

TSO

Question 807

The LAFD believes how many ropes should always be used in a system?

Answer 807

Two ropes

Question 808

What 3 tools can be used as a reaching device for grabbing a victim during a swift water operation?

Answer 808

D handled pike pole, D handled rubbish hook, or a 6 foot pole with a D handle at both ends

Question 809

The crossfire portable monitor is manufactured by what company?

Answer 809

Task force tips

Question 810

What 5 components make up the TFT crossfire portable monitor?

Answer 810

Cross fire upper assembly
Stow-a-way 800 base
Built in shut off
Master stream 1000 selectable spray tip
Tie down strap

Question 811

Low nozzle elevation angles can cause the portable monitors to slide or lift resulting in injury or death, do not operate the monitor on the portable base below the what?

Answer 811

Elevation safety stop

Question 812

To prevent the monitor from sliding, make sure base legs all locked in position and all what in contact with the ground?

Answer 812

Leg spikes

Question 813

To prevent the portable monitor from sliding, securely tie the monitor to an object capable of withstanding how many pounds of force?

Answer 813

900 pounds

Question 814

What type of streams are powerful and capable of causing injury and property damage?

Answer 814

Master streams

Question 815

What 3 safety headings does the portable monitor provide?

Answer 815

Danger, warning, caution

Question 816

How much does the crossfire upper assembly weigh?

Answer 816

17 pounds

Question 817

The stow-a-way 800 base weighs how much including the 4” inline shut off valve that weighs 23 pounds combined?

Answer 817

43.7 pounds

Question 818

The total weight of the portable monitor is approximately how many pounds?

Answer 818

61 pounds

Question 819

An automatic what empties the water from a low point in the portable monitor piping preventing freezing and helps empty the hose lines?

Answer 819

Drain

Question 820

The valve in the drain is designed to close automatically when the pressure in the monitor exceeds approximately what psi and opens again when the pressure drops to that point?

Answer 820

5 psi

Question 821

The legs of the portable monitor are made of what and will flex when in use to compensate for small ground irregularities?

Answer 821

Stainless spring steel

Question 822

The cross fire portable monitor is intended for max floor of 800 gpm, but TFT allows LAFD to flow up to how many gpm with as long as the portable base is attached to a loop of loaded 4” supply hose?

Answer 822

1000 gpm

Question 823

How many pawls actuated by the slide bar engage in the base swivel to make the quick connect joint on the portable monitor?

Answer 823

2 pawls

Question 824

What engages in the slide bar to prevent accidental unlocking of the slide bar when the monitor is under pressure?

Answer 824

Safety plunger

Question 825

What is provided to secure the portable monitor to an anchor point or to a loop of hose?

Answer 825

Tie down strap

Question 826

The tie down strap is made of nylon webbing and is how many feet long?

Answer 826

8 feet

Question 827

Each end of the tie down strap has a loop and how many carabiners is provided for attachment to the base of the portable monitor?

Answer 827

1

Question 828

To install the upper assembly of the portable monitor to the base, make sure the nozzle is above what degree safety stop?

Answer 828

35 degrees

Question 829

Side to side rotation on the portable monitor is accomplished by rotating which part of the monitor?

Answer 829

Upper assembly on its base

Question 830

When not rotating the upper assembly on the base of the portable monitor, keep the rotation lock in what position?

Answer 830

Locked

Question 831

When a nozzle is flowing water, the reaction force is in what type of line directly opposite the water flowing out the end of the nozzle?

Answer 831

Straight line

Question 832

If a nozzle on a portable monitor is pointed straight up, all of the reaction force is directed where and there is no sideways force that can cause the base to slide?

Answer 832

Straight down

Question 833

As the elevation angle of the nozzle is lowered, the downward component of force decreases while the horizontal component of the force does what, causing more tendency for the portable monitor to move sideways?

Answer 833

Increases

Question 834

When the nozzle is at an angle of what degree, the force acting sideways is equal to the force acting downward on the base of the portable monitor?

Answer 834

45 degrees

Question 835

At an angle of what degrees (angle at elevation stop), approximately 82% of the nozzle reaction force is acting sideways on the base of the portable monitor?

Answer 835

35 degrees

Question 836

When the nozzle is at what degree angle, the entire reaction force is acting sideways on the base and there is no downward force at all?

Answer 836

Zero degrees

Question 837

You should not operate the portable base below what because it is dangerous and injury or death can occur if the monitor and base slides or lifts off the ground?

Answer 837

Safety stop

Question 838

The crossfire portable monitor has how many tungsten carbide tipped spikes on the legs and the base to resist sliding by digging into the surface the monitor is sitting on?

Answer 838

5 or 6

Question 839

The amount of what the spikes can withstand depend on downward and sideways force that is on the base and the hardness and texture the spikes are in contact with?

Answer 839

Sliding force

Question 840

Spikes are essential to safe operations and must be in contact with the ground at all times, set the monitor on even surface so that how many spikes contact the ground?

Answer 840

All 3

Question 841

Replace and spike if the tip diameter exceeds how many inches?

Answer 841

1/16

Question 842

Spikes are sharp and exposed, use care around spikes to avoid injury and damage to what?

Answer 842

Clothing and property

Question 843

When anchoring the tie off strap to an object or hose, if the strap is too short to reach a suitable anchor, it may be extended with what?

Answer 843

Strong rope or chain

Question 844

When securing the tie down strap to the 4” hose, the diameter of the loop of hose should be how much?

Answer 844

10 feet

Question 845

A sliding monitor can cause injury, remove all slack between what before flowing water on the portable monitor?

Answer 845

Anchor and base

Question 846

As horizontal angle increases between the anchor strap and stream, the base can begin to slide in an arc around the anchor point which may require how many anchor points?

Answer 846

Multiple

Question 847

When connecting the hose to the portable monitor, extend the hose straight back from the portable monitor at least how many feet?

Answer 847

10 feet

Question 848

Because of the arched trajectory of a fire stream, it is recommended that what be used to accurately direct the stream from the monitor?

Answer 848

A spotter

Question 849

Safe operation of the monitor on the portable base begins with what selection?

Answer 849

Site selection

Question 850

Select a flat even surface within how many feet of the 4” hose that is looped around the monitor or a sturdy object that can be used as an attachment point for the anchor strap?

Answer 850

8 feet

Question 851

Make sure there is no damage to the appliance such as dents, cracks, corrosion, missing, broken or loose parts, damaged marking or other defect how often?

Answer 851

Before use

Question 852

When using the hose loop as anchor, place the first female coupling alongside the 4” hose approximately how many feet back from the male coupling of the monitor and the coupling to the hose at that point using a ladder strap?

Answer 852

10 feet

Question 853

What psi should be pumped to the portable monitor at 350, 500, 750, and 1000 gpm?

Answer 853

105 psi @ 350 gpm
110 psi @ 500 gpm
115 psi @ 750 gpm
125 psi @ 1000 gpm

Question 854

Which nozzle is the ONLY one that can be used with the crossfire portable monitor?

Answer 854

Master stream 1000 selectable volume spray tip

Question 855

The portable monitor should be kept clean and free of dirt by flushing with water after what?

Answer 855

Each use

Question 856

Do not make any alterations to monitor, any alterations to monitor and markings could diminish what and constitutes a misuse of this product?

Answer 856

Safety

Question 857

To lube the zerk fitting for the elevation worm gear, turn the elevation handwheel to move the nozzle to its highest elevation and pump what type of grease into fitting until excess appears?

Answer 857

Medium viscosity automotive grease