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Church Notes > BK 29 Truck Operations Manuel > Flashcards

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

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2
Q

What are the two types of ventilation holes?

Ch.1

A 
Heat holes (Offensive)
Strip ventilation (Defensive)
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3
Q

When operating on what type of roof, the vent team shall never ventilate directly over the fire?
Ch.1

A

Lightweight roofs

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4
Q

What is a kerf cut?

Ch.1

A

A single cut, chainsaws width, through the decking

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5
Q

How many inches inside the purlin shall the cuts be to avoid the metal hangers?
Ch.1

A

4-6 inches

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6
Q

Conventional construction utilizes structural members that depend on what for their strength?
CH.2

A

Their size

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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

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8
Q

A single lightweight truss structural member can span how many feet?
Ch.2

A

70 feet

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9
Q

For size up considerations, Roof’s can be divided into what categories?
Ch.2

A

Hip, Bridge truss, Flat, Arch, Gable, Sawtooth

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10
Q

In a gable roof, rafters are usually what?

Ch.2

A

2x6 or larger, spaced 16” to 24” on center

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11
Q

Steep pitched gables can have rafters spaced up to how far?

Ch.2

A

36 inches

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12
Q

How are lightweight gables built?

Ch.2

A

2x3 or 2x4 inch wood trusses held together by metal gusset plate connectors

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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

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14
Q

What are the strong areas of a gable roof?

Ch.2

A

Ridge and areas where the rafters cross outside walls

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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

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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)

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17
Q

What are the strengths of a hip roof?

Ch.2

A

Ridge board, valley rafter, hip rafter and walls

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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

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19
Q

What are wooden truss members made of in bridge truss roofs?

Ch.2

A

2”x 12”

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20
Q

What rafters are found on a bridge truss roof?

Ch.2

A

2 x 6 or larger

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21
Q

What type of sheathing is found on a bridge truss roof?

Ch.2

A

1 x 6” diagonal or straight

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22
Q

When will you find diagonal vs straight sheathing?

Ch.2

A

Pre-33 Straight

33 and later Diagonal

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23
Q

If modified for the Earthquake Ordinance, what will be found on top of straight sheathing?
Ch.2

A

Plywood (adds shear strength)

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24
Q

Where are bowstring arch roofs found?

Ch.2

A

Commercial structures built in the 30s, 40s and 50s

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25
Q

What size lumber comprises the arch trusses and related members?
Ch.2

A

2 x 12” or 2 x 14”

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26
Q

What size are rafters on bowstring arch roofs?

Ch.2

A

2 x 6” or larger

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27
Q

What type of sheathing is found on bowstring arch roofs?

Ch.2

A

Pre-33 straight

33 and later diagonal

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28
Q

What are the characteristics of a lamella arch roof?

Ch.2

A

Egg crate, geometric or diamond pattern roof, 2 x 12” wood framing, 1 x 6” inch sheeting

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29
Q

Total roof collapse may occur if what percentage of the lamella’s roof structure is removed by fire?
Ch.2

A

20%

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30
Q

What is the largest difference between arch truss roofs and tied truss roofs?
Ch.2

A

5/8 inch tie rods are used below each arch member in tie truss roofs

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31
Q

How is proper tie rod tension maintained?

Ch.2

A

Turnbuckles

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32
Q

What size are the rafters on tied truss arch roofs?

Ch.2

A

2 x 10” or larger

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33
Q

What type of sheathing is found on tied truss arch roofs?

Ch.2

A

Pre-33 straight

33 and later diagonal

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34
Q

What is the primary hazard of tied truss roof’s?

Ch.2

A

Early failure of the metal tie rods and turnbuckles

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35
Q

What is the primary advantage to building a sawtooth roof?

Ch.2

A

To yield additional light and ventilation for manufacturing type occupancies

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36
Q

What size are rafters on sawtooth roofs?

Ch.2

A

2 x 8 or larger

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37
Q

What size rafters are on conventional flat roofs?

Ch.2

A

2 x 6 or larger

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38
Q

What sheathing is found on conventional flat roofs?

Ch.2

A

1 x 6” or plywood if newer

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39
Q

What is common spacing for lightweight members (wooden I, open Web, etc.)?
Ch.2

A

24” on center

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40
Q

Where are nailing blocks found?

Ch.2

A

Perpendicular to the top chords and spaced 4 feet

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41
Q

On an open web roof, the steel tube web members are pre-fabricated from what?
Ch.2

A

1-2” cold rolled steel tubing

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42
Q

How long can spans be with an open web remember?

Ch.2

A

70 feet

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43
Q

How long can spans be with a metal gusset plate roof?

Ch.2

A

80 feet

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44
Q

What for major components comprise panalized roofs?

Ch.2

A

Laminated Beams, purlins, 2 x 4” rafters, plywood decking

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45
Q

What is the most common size for a laminated beam (Lam Beam)?
Ch.2

A

6 x 36”

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46
Q

How far are purlins spaced?

Ch.2

A

12’ to 40’

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47
Q

What is rafter spacing on a panelized roof?

Ch.2

A

24” inches on center

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48
Q

What is a common size for a purlin?

Ch.2

A

4 x 12”

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49
Q

What are the strengths of a panelized roof?

Ch.2

A

Beams, purlins, building perimeter

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50
Q

What are open web bar joist roof characteristics?

Ch.2

A

1/8” steel (top and bottom chords)

5/8” steel bar web supports

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51
Q

Still begins to lose its strength at what temperature?

Ch.2

A

1000°F

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52
Q

How thick will a lightweight concrete roof be?

Ch.2

A

3-4 inches, air entrained mixture

Robertson decking

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53
Q

What blade should be used on the rotary saw when ventilating lightweight concrete roofs?
Ch.2

A

Diamond blade or carbide tipped

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54
Q

What are characteristics of a pre-33 Masonary building?

Ch.2

A

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”

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55
Q

How high can a parapet walls be on a pre-33?

Ch.2

A

3 feet above roofline or 5 feet if façade on the front

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56
Q

What revisions were made to buildings post 33?

Ch.2

A

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

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57
Q

What revisions were made to buildings post 59?

Ch.2

A

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
Q

Unreinforced masonry may have what trademarks?

Ch.2

A

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
Q

What are the safe areas of URM buildings?

Ch.2

A

Corners, or distance away from the building at least equal to building height

60
Q

You can estimate the amount of time a structure will remain strong by these three factors?
Ch.2

A

Type of construction

How long fire is burning Fire intensity

61
Q

Concrete tilt ups can be built up to how many stories high?

Ch.2

A

5 stories

62
Q

The primary dangers in unreinforced masonry walls are?

Ch.2

A

The collapse of front and rear walls

63
Q

Save areas around URM’s are?

Ch.2

A

Corners and distance equal to height of the walls

64
Q

Chapter 3

Plans for ventilation operations should begin by?

A

ID the direction (horizontal or vertical) contaminants must travel to exit contaminated area

65
Q

Chapter 3

What are the two basic methods that are utilized to pressurize a contaminated area?

A

Natural and mechanical ventilation

66
Q

Chapter 3

Where is the blower pleased when performing negative pressure ventilation?

A

Inside the structure

67
Q

Chapter 3

What are the disadvantages of negative pressure ventilation’s?

A

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
Q

Chapter 3

Where is the blower pleased when performing positive pressure ventilation?

A

Outside the structure

69
Q

Chapter 3

Positive pressure ventilation is how many more times affective the negative pressure ventilation?

A

Approximately twice as effective

70
Q

CH3
Positive pressure is most efficient when the exhaust opening is what size in relation to the size of the entrance opening?

A

Between 3/4 and 1 3/4

71
Q

CH3

What is an indicator that the exhaust opening is not large enough?

A

Exhaust odor in the area to be ventilated

72
Q

CH3

Positive pressure has proven effective against winds up to what speed?

A

25 mph

73
Q

CH3

Effective positive pressure ventilation is dependent on?

A

Controlling entrance opening

Path of interior airflow Size of exhaust opening

74
Q

CH3

Smaller blower should be moved ____ from entrance and larger blowers ____?

A

Small; Back

Large; Closer

75
Q

CH3

If unequal CFM/size blowers are used in series place the larger blower how many feet behind the smaller blower?

A

2 feet

76
Q

CH3

A blower behind another blower increases the capacity of the first floor by how much?

A

10%

77
Q

CH3

Removing screens on windows will increase the efficiency by what percent?

A

50%

78
Q

CH3

During overhaul, what PPM of CO is easily obtained?

A

500ppm to 1200ppm

79
Q

CH3

What size house is a18” blower adequate for?

A

2000 sq ft

80
Q

CH3

What concentrations of CO can be fatal in less than one hour?

A

4000 ppm

81
Q

CH3

Positive pressure should never be used in place of?

A

SCBA when hazardous atmospheres are encountered

82
Q

CH4

What are the two different types of elevators?

A

Cable and hydraulic

83
Q

CH4

What two types of cable elevators are there?

A

Drum type or traction type

84
Q

CH4

Drum type elevators are restricted to lifts of what height?

A

150 feet and slow speed’s

85
Q

CH4

Equipment rooms for hydraulic elevators are normally found where?

A

At the lower level of the building

86
Q

CH4

Equipment rooms for hydraulic elevators are normally found at the lower level of the building but can be where?

A

At any floor level or 50 to 100 feet from the elevator shaft

87
Q

CH 4

Freight elevators can be up to what size/capacity?

A

12 x 14’ , 3 tons (6000 pounds)

88
Q

CH4

The door on the car itself, which travels with the elevator is called what?

A

Inner door or car door

89
Q

CH4

The door that is seen from each floor on the building is called what?

A

Hoistway door

90
Q

CH4

Which door actuates the other door?

A

The car door or inner door operates the hoistway door

91
Q

CH4

What are the four basic types of doors used on elevators?

A

Swing hall,
single slide,
center opening,
two speed

92
Q

CH4

What size are the Gib blocks?

A

3” wide
1” high
1/2” thick

93
Q

CH4

GIB blocks are installed every how many inches?

A

18 inches

94
Q

CH4

What purpose do GIB blocks serve?

A

They provide stability to the hoistway door as it opens and closes

95
Q

CH4

Normal hoistway doors can be expected to utilize how many GB blocks?

A

2 GIB blocks

96
Q

CH4

What is elevator “over speeding”?

A

When an elevator travels at more than 20% of its TopSpeed

97
Q

CH4

On scene information should consist of what minimum considerations?

A

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
Q

CH4

When recycling power, leave off for how long?

A

At least 30 seconds

99
Q

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?

A

6 inches

100
Q

CH4
On cable elevators, the hoistway door will open if the elevator is within how many inches above or below the floor level?

A

18 inches

101
Q

CH4

When inserting an airbag in between center opening doors, where shout the bag be placed?

A

Near the top

102
Q

CH4

And escalator traveling between 90 and 120 ft./m can carry up to how many passengers per hour?

A

5000 passengers

103
Q

CH4

The pick up arm clutch on the hoistway door is generally how long on hydraulic elevators?

A

14 inches long

104
Q

CH4

The pickup arm clutch on the hoistway door is generally how long on cable elevators?

A

36 inches long

105
Q

CH5

Where does Los Angeles get its water?

A

75% two Aquaducts from Sierra Nevada

15% wells in San Fernando Valley

10% Metropolitan water District

106
Q

CH5

How big can trunk lines be in the water distribution system?

A

36” to 10’

107
Q

CH5

Where are Mains found, and what sizes can they be?

A

Beneath a Street and parallel to a curb 2” to 72”

108
Q

CH5

What size can customers service lines be?

A

Vary from 1/2” to 12”

109
Q

CH5

What to types of shut off valves can be found?

A

Non-indicating valves and indicating valves

110
Q

CH5

What will be found on him indicating valve?

A

OS&Y or PIV

111
Q

CH5

Are water meters bi-directional?

A

No, one-way flow only

112
Q

CH5

What is a compound meter used for?

A

Can meter high and low flow’s, meters are 4” or larger

113
Q

CH5

What size can detector check valves be?

A

2” to 10”

114
Q

CH5

What psi do dwellings commonly use?

A

40 to 80 psi

115
Q

CH5

What size meter will be found at most single-family dwellings?

A

1/2” to 2”

116
Q

CH5

What size will a detector check valve be at a single family dwelling?

A

2”

117
Q

CH5

For hotels, what size meter may be found and what size detector check valve may be found?

A

4” to 6” water meter.

4” to 8” detector check valve

118
Q

CH5

What size meter and detector check valve will be found in a high-rise?

A

4” to 10” meter.

4” to 12” detector check valve

119
Q

CH5

Ball, cone or gate valves, what size and above may need to be exercised to completely eliminate the flow of water?

A

3 inches and above

120
Q

Fire hydrant gate valves may require how many full turns to a complete shut down?

A

18 to 26

121
Q

CH5

What percentage of hydrants close in a clockwise direction?

A

98%

122
Q

What info shall be communicated to MFC after shutting down a hydrant?

A

Hydrant location

If hydrant has been shut down

number of valves operated

123
Q

CH6

What is the ignition temp of natural gas?

A

1100°F

124
Q

CH6

What is natural gas flammable range?

A

4-14%

125
Q

CH6

What psi can transmission lines have?

A

Up to 1000 PSI

126
Q

CH6

Transmission lines can be up to what size?

A

12-36” diameter pipes

127
Q

CH6

Medium pressure service lines do not normally exceed what psi?

A

60 PSI

128
Q

CH6

What is the PSI at the service meter?

A

1/3psi

129
Q

CH6

How many small fires be extinguished?

A

CO2 or dry chem

130
Q

CH7

How many air rescue cushions do we have?

A

24- (6) 100 feet and (18) 70 feet

131
Q

CH6

How fast can the ARC absorb and dissipate the energy of impact?

A

1/6th of a second

132
Q

CH6

What is the tear strength of the ARC vinyl reinforced fabric?

A

50lbs psi

133
Q

CH6

How many feet per floor does the ARC used to calculate height in stories?

A

10 feet per floor

134
Q

CH6

What is the preferred source of electricity for the ARC fans?

A

Onboard truck generator

135
Q

CH6

What are the two negatives associated with using gas powered blowers to inflate the ARC?

A

Added noise and producing CO, which has a long-term degenerative effect on the fabric

136
Q

CH6

How fast will the ARC in fleet? Reinflate?

A

60 seconds/20 seconds

137
Q

CH6

Whose primary responsibility is Securing primary and secondary power sources and lighting at night time?

A

Apparatus operator

138
Q

CH6

Who is primary responsibility is to deploy the electric fans to the area?

A

Both engineers

139
Q

CH6

Who is primary responsibility is to deploy the gas powered blowers to the area as a back up?

A

200 series engineer

140
Q

When is the ARC inspected?

A

Monthly and after each use

141
Q

What are the dimensions for the 70 foot ARC?

A

15’ x 20’
8’ thick
190 lbs

142
Q

CH6

What are the dimensions for the 100 foot ARC?

A

20’ x 20’
9’ thick
360 lbs

Church Notes (34 decks)

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