BK 29 Truck Operations Manuel Flashcards
1
Q
What are the four objectives of ventilation?
Ch. 1
A
Saves lives
Assists in FF access
Controls horizontal spread of fire
Reduces possibility of flashover and backdraft
2
Q
What are the two types of ventilation holes?
Ch.1
A
Heat holes (Offensive) Strip ventilation (Defensive)
3
Q
When operating on what type of roof, the vent team shall never ventilate directly over the fire?
Ch.1
A
Lightweight roofs
4
Q
What is a kerf cut?
Ch.1
A
A single cut, chainsaws width, through the decking
5
Q
How many inches inside the purlin shall the cuts be to avoid the metal hangers?
Ch.1
A
4-6 inches
6
Q
Conventional construction utilizes structural members that depend on what for their strength?
CH.2
A
Their size
7
Q
Lightweight Construction does not derive its strength from SIZE, but instead what?
Ch.2
A
Multiple members in compression and tension. If one member fails, others may fail
8
Q
A single lightweight truss structural member can span how many feet?
Ch.2
A
70 feet
9
Q
For size up considerations, Roof’s can be divided into what categories?
Ch.2
A
Hip, Bridge truss, Flat, Arch, Gable, Sawtooth
10
Q
In a gable roof, rafters are usually what?
Ch.2
A
2x6 or larger, spaced 16” to 24” on center
11
Q
Steep pitched gables can have rafters spaced up to how far?
Ch.2
A
36 inches
12
Q
How are lightweight gables built?
Ch.2
A
2x3 or 2x4 inch wood trusses held together by metal gusset plate connectors
13
Q
What is the most common size for metal connectors?
Ch.2
A
18 gauge steel plates with prongs that penetrate 3/8” of an inch
14
Q
What are the strong areas of a gable roof?
Ch.2
A
Ridge and areas where the rafters cross outside walls
15
Q
What decking is found on conventional and light weight gable roof’s?
Ch.2
A
Conv.- 1 x 4 or 1 x 6 inch space sheathing
LW- 3/8” or 1/2” plywood
16
Q
What is a jack rafter?
Ch.2
A
A rafter that crosses an outside wall but does not reach the ridge board (may reach the hip rafter)
17
Q
What are the strengths of a hip roof?
Ch.2
A
Ridge board, valley rafter, hip rafter and walls
18
Q
Where are bridge truss roof’s found?
Ch.2
A
Various types and sizes of commercial buildings constructed during the 30s and 40s
19
Q
What are wooden truss members made of in bridge truss roofs?
Ch.2
A
2”x 12”
20
Q
What rafters are found on a bridge truss roof?
Ch.2
A
2 x 6 or larger
21
Q
What type of sheathing is found on a bridge truss roof?
Ch.2
A
1 x 6” diagonal or straight
22
Q
When will you find diagonal vs straight sheathing?
Ch.2
A
Pre-33 Straight
33 and later Diagonal
23
Q
If modified for the Earthquake Ordinance, what will be found on top of straight sheathing?
Ch.2
A
Plywood (adds shear strength)
24
Q
Where are bowstring arch roofs found?
Ch.2
A
Commercial structures built in the 30s, 40s and 50s
25
What size lumber comprises the arch trusses and related members?
Ch.2
2 x 12” or 2 x 14”
26
What size are rafters on bowstring arch roofs?
| Ch.2
2 x 6” or larger
27
What type of sheathing is found on bowstring arch roofs?
| Ch.2
Pre-33 straight
| 33 and later diagonal
28
What are the characteristics of a lamella arch roof?
| Ch.2
Egg crate, geometric or diamond pattern roof, 2 x 12” wood framing, 1 x 6” inch sheeting
29
Total roof collapse may occur if what percentage of the lamella’s roof structure is removed by fire?
Ch.2
20%
30
What is the largest difference between arch truss roofs and tied truss roofs?
Ch.2
5/8 inch tie rods are used below each arch member in tie truss roofs
31
How is proper tie rod tension maintained?
| Ch.2
Turnbuckles
32
What size are the rafters on tied truss arch roofs?
| Ch.2
2 x 10” or larger
33
What type of sheathing is found on tied truss arch roofs?
| Ch.2
Pre-33 straight
33 and later diagonal
34
What is the primary hazard of tied truss roof’s?
| Ch.2
Early failure of the metal tie rods and turnbuckles
35
What is the primary advantage to building a sawtooth roof?
| Ch.2
To yield additional light and ventilation for manufacturing type occupancies
36
What size are rafters on sawtooth roofs?
| Ch.2
2 x 8 or larger
37
What size rafters are on conventional flat roofs?
| Ch.2
2 x 6 or larger
38
What sheathing is found on conventional flat roofs?
| Ch.2
1 x 6” or plywood if newer
39
What is common spacing for lightweight members (wooden I, open Web, etc.)?
Ch.2
24” on center
40
Where are nailing blocks found?
| Ch.2
Perpendicular to the top chords and spaced 4 feet
41
On an open web roof, the steel tube web members are pre-fabricated from what?
Ch.2
1-2” cold rolled steel tubing
42
How long can spans be with an open web remember?
| Ch.2
70 feet
43
How long can spans be with a metal gusset plate roof?
| Ch.2
80 feet
44
What for major components comprise panalized roofs?
| Ch.2
Laminated Beams, purlins, 2 x 4” rafters, plywood decking
45
What is the most common size for a laminated beam (Lam Beam)?
Ch.2
6 x 36”
46
How far are purlins spaced?
| Ch.2
12’ to 40’
47
What is rafter spacing on a panelized roof?
| Ch.2
24” inches on center
48
What is a common size for a purlin?
| Ch.2
4 x 12”
49
What are the strengths of a panelized roof?
| Ch.2
Beams, purlins, building perimeter
50
What are open web bar joist roof characteristics?
| Ch.2
1/8” steel (top and bottom chords)
| 5/8” steel bar web supports
51
Still begins to lose its strength at what temperature?
| Ch.2
1000°F
52
How thick will a lightweight concrete roof be?
| Ch.2
3-4 inches, air entrained mixture
| Robertson decking
53
What blade should be used on the rotary saw when ventilating lightweight concrete roofs?
Ch.2
Diamond blade or carbide tipped
54
What are characteristics of a pre-33 Masonary building?
| Ch.2
Sand and lime mortar only no cement lack of steel reinforced rods (rebar)
exterior walls 13 inches thick, parapet wall around the perimeter of roof, floor and Joists are “let” into exterior walls Straight roof sheathing floor and roof joists that are “Fire Cut”
55
How high can a parapet walls be on a pre-33?
| Ch.2
3 feet above roofline or 5 feet if façade on the front
56
What revisions were made to buildings post 33?
| Ch.2
Exterior walls at least 9 inches thick
Masonary walls must have steel rebar
All joists and rafters anchored to exterior walls
Cement used in mortar
Diagonal roof sheathing
57
What revisions were made to buildings post 59?
| Ch.2
4-6” bond cap on parapets along public walkways
parapet wall limited to 16 inches including bond cap
Rafter anchor rods installed every 4 feet (tie plates)
58
Unreinforced masonry may have what trademarks?
| Ch.2
Rafter tie plates, bond beam cap
Deep recessed windows windows may have arched or straight lintels, lime mortar is easily rubbed away, one row of bricks laid on end (kings Row) every 4 to 7 rows
59
What are the safe areas of URM buildings?
| Ch.2
Corners, or distance away from the building at least equal to building height
60
You can estimate the amount of time a structure will remain strong by these three factors?
Ch.2
Type of construction
| How long fire is burning Fire intensity
61
Concrete tilt ups can be built up to how many stories high?
| Ch.2
5 stories
62
The primary dangers in unreinforced masonry walls are?
| Ch.2
The collapse of front and rear walls
63
Save areas around URM’s are?
| Ch.2
Corners and distance equal to height of the walls
64
Chapter 3
| Plans for ventilation operations should begin by?
ID the direction (horizontal or vertical) contaminants must travel to exit contaminated area
65
Chapter 3
| What are the two basic methods that are utilized to pressurize a contaminated area?
Natural and mechanical ventilation
66
Chapter 3
| Where is the blower pleased when performing negative pressure ventilation?
Inside the structure
67
Chapter 3
| What are the disadvantages of negative pressure ventilation’s?
Personnel exposed to contaminants to position blower
Contaminants drawn through blower additional cleanup of blower
Blower placed in doorway or window hindering access/egress and using additional tools
Blower is not efficient at removing contaminants in top of room or building
68
Chapter 3
| Where is the blower pleased when performing positive pressure ventilation?
Outside the structure
69
Chapter 3
| Positive pressure ventilation is how many more times affective the negative pressure ventilation?
Approximately twice as effective
70
CH3
Positive pressure is most efficient when the exhaust opening is what size in relation to the size of the entrance opening?
Between 3/4 and 1 3/4
71
CH3
| What is an indicator that the exhaust opening is not large enough?
Exhaust odor in the area to be ventilated
72
CH3
| Positive pressure has proven effective against winds up to what speed?
25 mph
73
CH3
| Effective positive pressure ventilation is dependent on?
Controlling entrance opening
| Path of interior airflow Size of exhaust opening
74
CH3
| Smaller blower should be moved ____ from entrance and larger blowers ____?
Small; Back
| Large; Closer
75
CH3
| If unequal CFM/size blowers are used in series place the larger blower how many feet behind the smaller blower?
2 feet
76
CH3
| A blower behind another blower increases the capacity of the first floor by how much?
10%
77
CH3
| Removing screens on windows will increase the efficiency by what percent?
50%
78
CH3
| During overhaul, what PPM of CO is easily obtained?
500ppm to 1200ppm
79
CH3
| What size house is a18” blower adequate for?
2000 sq ft
80
CH3
| What concentrations of CO can be fatal in less than one hour?
4000 ppm
81
CH3
| Positive pressure should never be used in place of?
SCBA when hazardous atmospheres are encountered
82
CH4
| What are the two different types of elevators?
Cable and hydraulic
83
CH4
| What two types of cable elevators are there?
Drum type or traction type
84
CH4
| Drum type elevators are restricted to lifts of what height?
150 feet and slow speed’s
85
CH4
| Equipment rooms for hydraulic elevators are normally found where?
At the lower level of the building
86
CH4
| Equipment rooms for hydraulic elevators are normally found at the lower level of the building but can be where?
At any floor level or 50 to 100 feet from the elevator shaft
87
CH 4
| Freight elevators can be up to what size/capacity?
12 x 14’ , 3 tons (6000 pounds)
88
CH4
| The door on the car itself, which travels with the elevator is called what?
Inner door or car door
89
CH4
| The door that is seen from each floor on the building is called what?
Hoistway door
90
CH4
| Which door actuates the other door?
The car door or inner door operates the hoistway door
91
CH4
| What are the four basic types of doors used on elevators?
Swing hall,
single slide,
center opening,
two speed
92
CH4
| What size are the Gib blocks?
3” wide
1” high
1/2” thick
93
CH4
| GIB blocks are installed every how many inches?
18 inches
94
CH4
| What purpose do GIB blocks serve?
They provide stability to the hoistway door as it opens and closes
95
CH4
| Normal hoistway doors can be expected to utilize how many GB blocks?
2 GIB blocks
96
CH4
| What is elevator “over speeding”?
When an elevator travels at more than 20% of its TopSpeed
97
CH4
| On scene information should consist of what minimum considerations?
Is there an inoperative elevator?
Does it contain trapped occupants?
What are their condition?
Repair person notified? Their ETA? What is the location of an inoperative elevator?
What type of elevator, Hydraulic or cable?
Where is elevator equipment room?
98
CH4
| When recycling power, leave off for how long?
At least 30 seconds
99
CH4
On hydraulic elevators and some cable elevators, the hoistway doors will open if the elevator is within how many inches above or below the floor level?
6 inches
100
CH4
On cable elevators, the hoistway door will open if the elevator is within how many inches above or below the floor level?
18 inches
101
CH4
| When inserting an airbag in between center opening doors, where shout the bag be placed?
Near the top
102
CH4
| And escalator traveling between 90 and 120 ft./m can carry up to how many passengers per hour?
5000 passengers
103
CH4
| The pick up arm clutch on the hoistway door is generally how long on hydraulic elevators?
14 inches long
104
CH4
| The pickup arm clutch on the hoistway door is generally how long on cable elevators?
36 inches long
105
CH5
| Where does Los Angeles get its water?
75% two Aquaducts from Sierra Nevada
15% wells in San Fernando Valley
10% Metropolitan water District
106
CH5
| How big can trunk lines be in the water distribution system?
36” to 10’
107
CH5
| Where are Mains found, and what sizes can they be?
Beneath a Street and parallel to a curb 2” to 72”
108
CH5
| What size can customers service lines be?
Vary from 1/2” to 12”
109
CH5
| What to types of shut off valves can be found?
Non-indicating valves and indicating valves
110
CH5
| What will be found on him indicating valve?
OS&Y or PIV
111
CH5
| Are water meters bi-directional?
No, one-way flow only
112
CH5
| What is a compound meter used for?
Can meter high and low flow’s, meters are 4” or larger
113
CH5
| What size can detector check valves be?
2” to 10”
114
CH5
| What psi do dwellings commonly use?
40 to 80 psi
115
CH5
| What size meter will be found at most single-family dwellings?
1/2” to 2”
116
CH5
| What size will a detector check valve be at a single family dwelling?
2”
117
CH5
| For hotels, what size meter may be found and what size detector check valve may be found?
4” to 6” water meter.
4” to 8” detector check valve
118
CH5
| What size meter and detector check valve will be found in a high-rise?
4” to 10” meter.
| 4” to 12” detector check valve
119
CH5
| Ball, cone or gate valves, what size and above may need to be exercised to completely eliminate the flow of water?
3 inches and above
120
Fire hydrant gate valves may require how many full turns to a complete shut down?
18 to 26
121
CH5
| What percentage of hydrants close in a clockwise direction?
98%
122
What info shall be communicated to MFC after shutting down a hydrant?
Hydrant location
If hydrant has been shut down
number of valves operated
123
CH6
| What is the ignition temp of natural gas?
1100°F
124
CH6
| What is natural gas flammable range?
4-14%
125
CH6
| What psi can transmission lines have?
Up to 1000 PSI
126
CH6
| Transmission lines can be up to what size?
12-36” diameter pipes
127
CH6
| Medium pressure service lines do not normally exceed what psi?
60 PSI
128
CH6
| What is the PSI at the service meter?
1/3psi
129
CH6
| How many small fires be extinguished?
CO2 or dry chem
130
CH7
| How many air rescue cushions do we have?
24- (6) 100 feet and (18) 70 feet
131
CH6
| How fast can the ARC absorb and dissipate the energy of impact?
1/6th of a second
132
CH6
| What is the tear strength of the ARC vinyl reinforced fabric?
50lbs psi
133
CH6
| How many feet per floor does the ARC used to calculate height in stories?
10 feet per floor
134
CH6
| What is the preferred source of electricity for the ARC fans?
Onboard truck generator
135
CH6
| What are the two negatives associated with using gas powered blowers to inflate the ARC?
Added noise and producing CO, which has a long-term degenerative effect on the fabric
136
CH6
| How fast will the ARC in fleet? Reinflate?
60 seconds/20 seconds
137
CH6
| Whose primary responsibility is Securing primary and secondary power sources and lighting at night time?
Apparatus operator
138
CH6
| Who is primary responsibility is to deploy the electric fans to the area?
Both engineers
139
CH6
| Who is primary responsibility is to deploy the gas powered blowers to the area as a back up?
200 series engineer
140
When is the ARC inspected?
Monthly and after each use
141
What are the dimensions for the 70 foot ARC?
15’ x 20’
8’ thick
190 lbs
142
CH6
| What are the dimensions for the 100 foot ARC?
20’ x 20’
9’ thick
360 lbs
