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Book 29- Truck Ops > Bk 29 > Flashcards

Bk 29 Flashcards

1
Q

What is ventilation

A

Systematic removal of heat, smoke, fire gases from structure and replacing w/ color clean fresh air

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2
Q

Effective ventilation accomplishes

A
  1. saves lives
  2. Assist FF access
  3. Control horizontal spread
  4. Reduce chance of flashover/backdraft
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3
Q

Flashover

A

contents of a room heated to ignition temp and entire room ignites

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4
Q

Backdraft

A

contents reach ignition temp and there isn’t sufficient O2 to support combustion leading to an explosive inferno

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5
Q

Horizontal ventilation: Natural and positive

A
  1. natural- opening windows, doors and allowing wind to ventilate
  2. Positive- forcing clean, fresh pressurized air in w/ blowers
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6
Q

What is the key to effective vertical ventilation

A

knowledge of rafter type and direction

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7
Q

Older construction

A

solid lumber
withstand fire longer
cut directly over fire

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8
Q

lightweight

A

fail fast
reduced time on roof
trade space for time: complete operation prior to fire impinging on ventilation hole

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9
Q

two types of ventilation holes

A
  1. heat hole (offensive)
  2. strip (defensive)
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10
Q

what is a strip

A

long narrow section of roofing place well ahead of fire, acts as a firebreak

extend entire width used in conjunction w/ a heat hole

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11
Q

center rafter cut

A

cutting plywood
4 cuts

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12
Q

decking

A

material used for base and exterior covering

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13
Q

diaphragm nailing

A

plywood installed so 8’ side crosses rafters
staggered like brick wall

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14
Q

kerf cut

A

single cut made through decking, same width as saw blade
alternative to smoke indicator hole

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15
Q

H clips

A

metal clips used to hold butted ends of plywood together, common on pitched roofs

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16
Q

nailing block

A

2”x4” laid flat b/t rafters to provide nailing surface for the edge of plywood sheathing

4’ apart

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17
Q

plug cut

A

small triangle piece of roof covering (comp)

Determines sheathing type and roof comp thickness

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18
Q

Score cut

A

light cut of roof covering (comp only)

helps removal of multiple layers of comp

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19
Q

smoke indicator hole

A

small triangle cut through roof decking (sheathing and roofing material)

indicates conditions directly below

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20
Q

How often do you place smoke indicator hole

A

every few years

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21
Q

Turbine style ventilators are ___ % more effective when spinning

A

30

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22
Q

45 degree cut

A

2 cuts to identify rafter direction

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23
Q

45 degree inspection cut

A
  1. rafter type and direction
  2. sheathing type
  3. thickness of comp
  4. smoke indicator hole

*roll after rafter 6-10”

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24
Q

center rafter louver cut inside rafter how many inches

A

2-3”

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25
Q

when cutting panel stay how many inches inside purins to avoid hangers

A

4-6”

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26
Q

Gable roof rafter spacing and size

A

2x6” 16-24” oc or 36” steep pitch

ridge board 1x6” or no ridge board

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27
Q

Lightweight gable rater size and spacing

A

2x3 or 2x4 trusses held by metal gussets every 24” oc

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28
Q

metal gusset plate

A

18 gauge
3/8” penetration

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29
Q

Hip roof rafter size and spacing

A

2x6” 16-24” oc or 36” steep pitch

ridge board 1x6” or none

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30
Q

Bridge truss built

A

1930s and 1940s

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31
Q

bridge truss size

A

2x12” lumber
2x6” or larger rafters

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32
Q

what is knob and tube

A

pair of wiring suspended by ceramic insulators passing through ceramic tubes

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33
Q

curtain construction method can be about __ % faster than conventional construction

A

60

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34
Q

Positive pressure ventilation, exhaust opening must be what size the entrance opening

A

3/4”-1 3/4”

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35
Q

18” blower effective to what size house

A

2,000 square feet

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36
Q

blower is effective against winds up to __ mph

A

25 mph

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37
Q

positive pressure ventilation is how many times effective than negative ventilation

A

twice

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38
Q

In series large blower placed how many feet from door

A

2’

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39
Q

if in series w/ unequal blowers what’s the order of blowers

A

large first
small blower second

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40
Q

if entrance opening is limited to 3 or 4 feet raised porched what’s the order of blowers

A

smaller blower in entrance
large blower 3-4 feet back from door

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41
Q

in series blowers increases capacity of front blower by __ %

A

10

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42
Q

Removing screens increases ventilation by __%

A

50

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43
Q

carbon monoxide limits

A

500 ppm= inhaled for 1 hr w/ no effect

700 ppm=some effects

1200 ppm= very dangerous

4000 ppm= fatal

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44
Q

positive pressure vent can lower CO levels from 1000 ppm down to

A

130-220 ppm

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45
Q

what are the two types of elevators

A
  1. cable/electric (drum/traction)
  2. Hydraulic
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46
Q

Cable/drum is limited to how many feet

A

150’ slow speed

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47
Q

Hydraulic elevator limited to how many stories

A

6 stories

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48
Q

equipment room of hydraulic elevator can be how many ft from elevator

A

50-100’

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49
Q

Freight elevator size

A

12’ x 14’

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50
Q

freight elevator can carry up to how many tons

A

3 tons

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51
Q

what type of elevator doors

A
  1. swing hall door
  2. single slide door
  3. center opening door
  4. two speed door
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52
Q

gib blocks size and spacing

A

3” wide x 1” high x 1/2” thick
every 18” across bottom of door

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53
Q

when elevator car travels in excess of __ % of top speed brakes applied

A

20

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54
Q

reset elevator power

A

30 seconds

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55
Q

hydraulic elevator car w/i how many inches of floor level

A

6”

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56
Q

cable elevator car w/i how many inches of floor level

A

18”

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57
Q

Hydraulic lowering screw labeled

A
  1. ML
  2. MAN
  3. MANUAL
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58
Q

Blind shafts may have access panels/doors every __ floors or __ feet

A

3 floors or 80 feet

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59
Q

In blind elevator shaft, for __ or more floors has no hoist way door

A

3

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60
Q

escalators travel __ to __ feet per person

A

90-120’

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61
Q

escalators carry as many as ___ per hour

A

5000

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62
Q

Some hydraulic elevators over __ stories need counterbalance weights

A

6

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63
Q

pickup arm clutch length for hydraulic elevator

A

14”

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64
Q

pickup arm clutch length for cable elevator

A

36”

65
Q

Water utilities:

Trunk lines carry water from ___ to mains w/i distribution system

A

primary source

66
Q

trunk lines are __ “ to __ ft (iron and concrete)

A

36” to 10 feet

67
Q

main lines size

A

2” to 72” iron pipe

68
Q

service line between main and meter

A

1/2” to 12” (iron, copper, galvanized pipe, plastic)

69
Q

customer line b/t meter and structure

A

1/2” to 12”

70
Q

what kind of indicating valves

A

OS&Y or PIV

71
Q

water meters (calculate water usage)

A

1/2” to 10”

72
Q

detector check valves size

A

2” to 10”

73
Q

acceptable pressure common for dwellings

A

40 to 80 psi

74
Q

SFD water meter size

A

1/2” to 2”

75
Q

Hotel water meter size

A

4” to 6”

76
Q

Apartment water meter size

A

1” to 3”

77
Q

What are multiple meters for apts/mini malls called

A

Battery

78
Q

Types of sprinkler systems

A
  1. Automatic wet pipe system= filled w/ water at all times. When head is activated, water immediately flows from activated heads. Supplied by gravity tank, pressure tank, automatic fire pump or water service system
  2. Automatic dry pip system= pipes filled w/ compressed air. When head is activated air is released, allows water to enter
  3. non-automatic system= pipes are dry. FD must pump into FDC
  4. Deluge system= sprinklers are open/closed and supplied w/ water by head actuated valve
79
Q

Dry standpipe

A

siamese connection
2 1/2” outlets

80
Q

wet standpipe

A

occupant use
100’ of 1 1/2” unlined single jacketed hose w/ a 1/2” straight tip w/ no shut off

81
Q

diameter cap size and color for hydrant

A

6”
Blue

82
Q

how many turns to close hydrants and what % clockwise

A

18-26 turns
98% clockwise

83
Q

Ignition temp of natural gas

A

1100 degrees

84
Q

flash point natural gas

A

4-14%

85
Q

water Transmission line size

A

12” to 36”
up to 1000 psi

86
Q

Service lines medium pressure of

A

40-60 psi max

87
Q

service meter pressure

A

1/3 psi

88
Q

MSA (meter set assemblies) found in what areas

A
  1. outside
  2. underneath structure
  3. curb meter box
  4. cabinet set
89
Q

ring on stopcock

A

branch service (serves another residence)

90
Q

Flat washer

A

service line is plastic (inserted into an older metal pipe)

91
Q

band on stopcock

A

plastic line

92
Q

regulator reduces medium pressure to relatively low level

A

1/3 psi

93
Q

how many rescue air cushions are 100 ft

A

6 bags

94
Q

how many rescue air cushions are 70 feet

A

18 bags

95
Q

what is assigned for a jumper call

A

BC
Task Force
Rescue

96
Q

air cushion absorbs and dissipates energy in less than __ of a second

A

1/6

97
Q

air bag inflates in less than

A

60 seconds

98
Q

air bag reinflates in less than

A

20 seconds

99
Q

air bag tear strength

A

over 50 psi

100
Q

70 foot bag size

A

15 ft x 20 ft
190 lbs

101
Q

100 foot bag size

A

20 ft x 50 ft
360 lbs

102
Q

preferred source for rescue cushion

A

onboard generator, can run two blowers at same time

portable generator cannot run two blowers at the same time

103
Q

main line rated at

A

10,000 lbs

104
Q

core of rope carries what percent of the load

A

90%

105
Q

rope working load

A

666 working load

106
Q

end of rope swapped when

A

annually

2 black stripes=even years
1 black stripe= odd years

107
Q

approved markers for rope

A

carter marks a lot
sharpie
bunny smith magic marker

108
Q

how to clean rope

A

place in bag and wash w/ cold water

109
Q

approved rope cleaners

A

lifeline
ivory snow
woolite

110
Q

monthly check form

A

F 975

log when you receive rope, all training, emergency incidents

111
Q

webbing rating

A

4000 lbs

112
Q

red, yellow, blue webbing length

A

red=20
yellow=12
blue=5

113
Q

multi loop webbing length

A

3 feet

114
Q

8mm cord rating

A

3630 lbs

115
Q

LRH length

A

20’

116
Q

long prusik length

A

6’

117
Q

short prusik length

A

5’

118
Q

carabiners rating

A

9000 lbs

119
Q

brake bar rack rating

A

10,000 lbs at welded eye

120
Q

brake bar: how many bars for 1 person

2 persons?

A

4 bars

5 bars

121
Q

brake bar, never use less than __ bars

A

3 bars

122
Q

if rapelling or lowering over __ ft use brake bar

A

75’

123
Q

pickets pounded into ground how many feet and what angle

A

2’
15 degrees

124
Q

never be __ feet from edge and not tied off

A

5’

125
Q

secure portable monitor to object capable of withstanding __ lbs of force

A

900

126
Q

Portable monitor spike replaced if diameter exceeds

A

1/16”

127
Q

portable monitor drain closes

A

pressure exceeds 5 psi
opens when drops to 5 psi or lower

128
Q

max flow or portable monitor is 800 gpm unless attached to 4” loaded line

A

1000 gpm

129
Q

bowstring arch built in

A

1930s, 40, 50

130
Q

bowstring arch truss size

A

2x12 or 2x14

131
Q

bowstring arch rafter size

A

2x6 or larger

132
Q

lamella arch roof lumber size

A

2x12” w/ steel plates and bolts at junctions of framing

133
Q

__ % of roof removed by fire expect total collapse in “domino effect” for a lamella roof

A

20%

134
Q

Tied truss member size

A

2x12” or larger

135
Q

Tied truss rafter size

A

2x10 or larger

136
Q

Tied truss metal rods diameter

A

5/8”

137
Q

sawtooth built in what years

A

1930s and 1940s

138
Q

sawtooth rafter size

A

2x8” or larger

139
Q

Conventional flat rafter size

A

2x6” or larger

140
Q

Wooden I Beam chord sizes

A

2x4” or 2x3”
top chord compression
Bottom chord tension

141
Q

Wooden I Beam stem size

A

3/8” chipboard or plywood

142
Q

Open Web chord sizes

A

2x4 or (2) 2x3

143
Q

Open Web steel tube size

A

1 to 2 inch cold rolled steel

144
Q

Open web span

A

70 feet

145
Q

Metal gussets plate truss size

A

2x4”

146
Q

Metal gusset span

A

80 feet

147
Q

Panelized too rafter size and spacing

A

2x4”
24” OC by 8’ long

148
Q

Panelized beam size and spacing

A

6x36”
12-40 ft up to 100 ft

149
Q

Panelized purlin size and spacing

A

4x12”
8’ spacing

150
Q

open web bar joist top/bottom chord made of

web supports made of

A

chords= 1/8” steel

web supports 5/8” steel bar

151
Q

Open web bar joist span up to

A

45’

152
Q

open web bar joist spaced

A

8’ OC

153
Q

What is robertson decking made up

A

air entrained mixture of sand, cement, and pea gravel pumped on top of corrugated metal decking w/ wire mesh in the middle

wire mesh= 4x4” or 6x6” up to 3-4” thick

154
Q

Pre 33 Brick construction:

  1. mortar w/ sand and lime only, no cement
  2. Unreinforced masonry
  3. walls 13” thick
  4. 3 foot parapet, 5 feet or more along front building if used as a facade
  5. Floor and roof joists are “let” into exterior walls (penetrated/resting in a cavity)
  6. Straight roof sheathing
  7. Roof and floor joists are “fire cut” (ends cut w/ an angle) so that they pull loose during a fire and collapse into the building= w/o pulling down exterior walls
A
155
Q

Post 33- Long beach earthquake 1933 building codes changed

  1. Walls 9” thick
  2. reinforced w/ rebar
  3. joists and rafters required to be anchored to exterior walls (ledger board attached to walls to attach joist/rafters)
  4. cement used in the mortar
  5. Diagonal roof sheathing
A
156
Q

Post 59- after Tehachapi earthquake

  1. 4-6” bond beam cap placed on parapets over public walk ways
  2. parapet walls should not be higher than 16”
  3. Exterior walls drilled at roof level & steel bar/rod installed every 4’ and attached to existing roof rafter

-rendered the “fire cut” ineffective
-The steel anchor bar/rods are known as “rafter tie plates”

A
157
Q

Post 71- Selma Earthquake

  1. Anchored walls to floor and roof systems (steel bracing on roof)
  2. Strengthening roof construction (plywood, metal straps)
A
158
Q

How to identify brick construction

A
  1. rafter tie plates (rafters and joists anchored to exterior walls)
  2. bond beam cap= extra strength over windows and b/t second floors of multi story
  3. Deeply recessed window frames= exposes about 8” of brick (walls at least 13” thick)
  4. lime and mortar between brick is white, porous, sandy, and rubbed away by fingernail
  5. every 4-7 row of bricks will be king row (laid on end)= additional strength
159
Q

Balloon construction identification

A
  1. built during 20s, 30s, 40s up to 4 stories
  2. wood shiplap exterior
  3. no horizontal fire block in walls
  4. 2x3 or 2x4” rafters w/ 2x4” rough cut studs

Book 29- Truck Ops (1 decks)

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