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DRIVERS SCHOOL > LADDER > Flashcards

LADDER Flashcards

1
Q

what stations are platform ladders

A

L7, L13, L21

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2
Q

aerial platform stabilizers will correct for __ degrees of slope and grade

A

5

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3
Q

4 types of valves in hydraulic systems

A

check valves
relief valves
counterbalance valves
selector valves

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4
Q

8 reasons why you’d come to a complete stop

A

directed by law enforcement
red lights
stop signs
negative right of way
blind intersection
driver cannot account for all lanes of traffic
stopped school bus with flashing lights
other intersection hazards

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5
Q

3 tools/equipment that the ladder truck carries that are not on AFR engines

A

K12
chainsaw
lighting

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6
Q

window ventilation rules (3)

A

position aerial device slightly above and to the upwind side of the window
take out windows on the downwind portion first
clear all glass

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7
Q

you’re flowing 2000 GPM on an aerial ladder, what is the friction loss if there is 100’ of 5” laid

A

32

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8
Q

reduce load by 50% at these wind speeds
seagraves:
new pierce platforms:
pierce ladders:

A

20 mph
25 mph
50mph

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9
Q

who is required to take driver refresher training

A

all that is listed

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10
Q

three routes for rescue

A

1st choice: interior stairwell
2nd choice: reliable exterior fire escape
3rd choice: ground/arial ladders

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11
Q

___ extension at ___ angles = ___

A

long, low, high stress

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12
Q

three types of ladder stabilizers

A

A-frame, box, straight jack

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13
Q

what mode should the pinable waterway be secured when the ladder is bedded

A

rescue mode

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14
Q

if wind is over ___ mph, all weights are ___

A

50 mph, reduced by 50%

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15
Q

ladders should be spotted a minimum of ___ ft away from powerline

A

10ft

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16
Q

what are the two angles of aerial device operations and which is most stable

A

longitudinal axis (most stable)
perpendicular axis

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17
Q

all AFR ladders are designed to operate in what position

A

cantilever (not rested)

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18
Q

what does L17 and L20 carry in order to manually adjust the waterway

A

9/16” wrench

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19
Q

what order of priority are victims rescued in

A

most severely threatened by fire conditions
largest number of groups of people
remainder of people in fire area
people in exposed area

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20
Q

every __ GPM flowing will add __ of weight to structure every minute

A

250gpm, 1 ton

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21
Q

what are 3 portions of an aerial ladder

A

base, top rails, rungs

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22
Q

Per NFPA 1901, the narrowest portion of the aerial ladder cannot be narrower than how many inches ?

A

18”

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23
Q

per NFPA 1901 aerial rungs are spaced __ on center

A

14”

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24
Q

aerial ladders less than 110 ft are required to be raised and rotated 90 degrees in __ seconds or less

A

120

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25
Q

aerial platforms required to be raised and rotated 90 degrees in __ secs or less

A

150

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26
Q

aerial ladders 100ft or greater are required to be raised and rotated 90 degrees in __seconds or less

A

180

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27
Q

what are the 3 classes of ladders

A

aerial ladders
elevating platforms
water towers

28
Q

what is the minimum amount of ground ladders required to be on an aerial apparatus per NFPA 1901

A

115ft

29
Q

what are the 4 main tactical uses for aerial devices

A

rescue
access to upper floors
ventilation
fire suppression

30
Q

what are the 4 operational strategies for an aerial apparatus

A

rescue
exposure protection
ventilation
elevated fire attack

31
Q

if fire fighting on a building 5 floors or more, position the ladder on ___ side of pumper

A

inside

32
Q

if fire fighting on a building that is 4 floors or less, position the ladder on ___ side of pumper

A

outside

33
Q

for a close-up blitz attack, what is the best angle

A

30 degrees, off the ceiling, nozzle even with sill

34
Q

outrigger pad pressure with and without pads

A

150 psi without pads
75 psi with pads

35
Q

emergency hydraulic power time (EPU)

A

old pierce - 7 mins work, 30 mins rest
platform - 30 mins work, 30 mins rest
seagraves - 5 mins work, 25 mins rest

36
Q

when stabilizing ladder with outriggers, rear tires should be off the ground about __ to __ inches

A

0.5-1”

37
Q

when you are in the green on the level indicator, the ladder is considered at

A

100% full load capacity

38
Q

if a person is on the tip, never __ or ___ the ladder

A

retract or extend

39
Q

ladder internal relief valve pressure

A

230-250 psi

40
Q

what is the fog curtail psi for aerial platform

A

75 psi

41
Q

what ladder beds at 0 or negative psi

A

seagraves

42
Q

the aerial ladder should be bedded at what psi

A

1800 psi

43
Q

aerial ladder stabilizers will correct for ___ degrees of slope and grade

A

3

44
Q

if A-frame ladder is operated on a slope, which end should face downhill

A

front of truck with ladder extended over rear, at an angle of 45 degrees from center line

45
Q

when operating over the downhill side of the vehicle and the vehicle suspension cannot be fully unloaded on the nonworking side, what happens to the ladder load capacity

A

it is reduced by half

46
Q

what are the two types of platform ladders

A

100ft rear mount
95ft mid mount

47
Q

what does PTO stand for

A

power take off

48
Q

max operating pressure for yellow and green 5”

A

yellow: 185 psi
green: 275 psi

49
Q

max loading for ladder is between __ and ___ degrees from horizontal

A

70 and 80

50
Q

collapse zone = ___ times the building height

A

1.5 times

51
Q

where do you position the aerial in the windows

A

place tip with first rung even with sill
4-6” off the objective (cantilever)

52
Q

where do you place the platform ladder in the window

A

top rail of platform even with the sill

53
Q

where do you position aerial ladder for roof rescue

A

place tip at least 6’ above roof line

54
Q

where do you position platform ladder for roof rescue

A

bottom of platform at the roof or parapet level (cantilever)

55
Q

three conditions that may affect exposure

A

weather
building construction
space between fire and exposures

56
Q

safe operating angles at full load capacity for aerial ladder

A

0 to 3.5 slope
0 to 5.5 grade

57
Q

safe operating angles at reduced load capacity for aerial ladder

A

3.6 to 5.5 slope
5.6 to 6.5 grade

58
Q

safe operating angles at full load capacity for a platform

A

0-5 slope and grade

59
Q

safe operating angles at reduced load for platform

A

5.1 to 8 slope and grade
if angle is greater than 8, reposition

60
Q

when stabilizing ladder with outriggers, rear tire should be off the ground about __ to __ inches

A

0.5-1”
A frame should be 6”

61
Q

when in the green on the level indicator, the ladder is at what

A

100% load capacity

62
Q

how should safety pins be placed

A

from the outside with face towards the ladder

63
Q

4 steps for ladder operation when raising the ladder

A

elevate, rotate, extend, lower

64
Q

when operating tip controls, aerial operates at __ of normal control speed

A

1/4

65
Q

when do you use override controls

A

to get out of dangerous situation

66
Q

what should you make sure before retracting the ladder

A

ensure drain valve is open for waterway and all personnel are removed

67
Q

aerial generator watts, volts, and amps

A

10,000/6,000 watts
240/120 volts
80/40 amps

DRIVERS SCHOOL (4 decks)

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