LADDER Flashcards
what stations are platform ladders
L7, L13, L21
aerial platform stabilizers will correct for __ degrees of slope and grade
5
4 types of valves in hydraulic systems
check valves
relief valves
counterbalance valves
selector valves
8 reasons why you’d come to a complete stop
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
3 tools/equipment that the ladder truck carries that are not on AFR engines
K12
chainsaw
lighting
window ventilation rules (3)
position aerial device slightly above and to the upwind side of the window
take out windows on the downwind portion first
clear all glass
you’re flowing 2000 GPM on an aerial ladder, what is the friction loss if there is 100’ of 5” laid
32
reduce load by 50% at these wind speeds
seagraves:
new pierce platforms:
pierce ladders:
20 mph
25 mph
50mph
who is required to take driver refresher training
all that is listed
three routes for rescue
1st choice: interior stairwell
2nd choice: reliable exterior fire escape
3rd choice: ground/arial ladders
___ extension at ___ angles = ___
long, low, high stress
three types of ladder stabilizers
A-frame, box, straight jack
what mode should the pinable waterway be secured when the ladder is bedded
rescue mode
if wind is over ___ mph, all weights are ___
50 mph, reduced by 50%
ladders should be spotted a minimum of ___ ft away from powerline
10ft
what are the two angles of aerial device operations and which is most stable
longitudinal axis (most stable)
perpendicular axis
all AFR ladders are designed to operate in what position
cantilever (not rested)
what does L17 and L20 carry in order to manually adjust the waterway
9/16” wrench
what order of priority are victims rescued in
most severely threatened by fire conditions
largest number of groups of people
remainder of people in fire area
people in exposed area
every __ GPM flowing will add __ of weight to structure every minute
250gpm, 1 ton
what are 3 portions of an aerial ladder
base, top rails, rungs
Per NFPA 1901, the narrowest portion of the aerial ladder cannot be narrower than how many inches ?
18”
per NFPA 1901 aerial rungs are spaced __ on center
14”
aerial ladders less than 110 ft are required to be raised and rotated 90 degrees in __ seconds or less
120
aerial platforms required to be raised and rotated 90 degrees in __ secs or less
150
aerial ladders 100ft or greater are required to be raised and rotated 90 degrees in __seconds or less
180
what are the 3 classes of ladders
aerial ladders
elevating platforms
water towers
what is the minimum amount of ground ladders required to be on an aerial apparatus per NFPA 1901
115ft
what are the 4 main tactical uses for aerial devices
rescue
access to upper floors
ventilation
fire suppression
what are the 4 operational strategies for an aerial apparatus
rescue
exposure protection
ventilation
elevated fire attack
if fire fighting on a building 5 floors or more, position the ladder on ___ side of pumper
inside
if fire fighting on a building that is 4 floors or less, position the ladder on ___ side of pumper
outside
for a close-up blitz attack, what is the best angle
30 degrees, off the ceiling, nozzle even with sill
outrigger pad pressure with and without pads
150 psi without pads
75 psi with pads
emergency hydraulic power time (EPU)
old pierce - 7 mins work, 30 mins rest
platform - 30 mins work, 30 mins rest
seagraves - 5 mins work, 25 mins rest
when stabilizing ladder with outriggers, rear tires should be off the ground about __ to __ inches
0.5-1”
when you are in the green on the level indicator, the ladder is considered at
100% full load capacity
if a person is on the tip, never __ or ___ the ladder
retract or extend
ladder internal relief valve pressure
230-250 psi
what is the fog curtail psi for aerial platform
75 psi
what ladder beds at 0 or negative psi
seagraves
the aerial ladder should be bedded at what psi
1800 psi
aerial ladder stabilizers will correct for ___ degrees of slope and grade
3
if A-frame ladder is operated on a slope, which end should face downhill
front of truck with ladder extended over rear, at an angle of 45 degrees from center line
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
it is reduced by half
what are the two types of platform ladders
100ft rear mount
95ft mid mount
what does PTO stand for
power take off
max operating pressure for yellow and green 5”
yellow: 185 psi
green: 275 psi
max loading for ladder is between __ and ___ degrees from horizontal
70 and 80
collapse zone = ___ times the building height
1.5 times
where do you position the aerial in the windows
place tip with first rung even with sill
4-6” off the objective (cantilever)
where do you place the platform ladder in the window
top rail of platform even with the sill
where do you position aerial ladder for roof rescue
place tip at least 6’ above roof line
where do you position platform ladder for roof rescue
bottom of platform at the roof or parapet level (cantilever)
three conditions that may affect exposure
weather
building construction
space between fire and exposures
safe operating angles at full load capacity for aerial ladder
0 to 3.5 slope
0 to 5.5 grade
safe operating angles at reduced load capacity for aerial ladder
3.6 to 5.5 slope
5.6 to 6.5 grade
safe operating angles at full load capacity for a platform
0-5 slope and grade
safe operating angles at reduced load for platform
5.1 to 8 slope and grade
if angle is greater than 8, reposition
when stabilizing ladder with outriggers, rear tire should be off the ground about __ to __ inches
0.5-1”
A frame should be 6”
when in the green on the level indicator, the ladder is at what
100% load capacity
how should safety pins be placed
from the outside with face towards the ladder
4 steps for ladder operation when raising the ladder
elevate, rotate, extend, lower
when operating tip controls, aerial operates at __ of normal control speed
1/4
when do you use override controls
to get out of dangerous situation
what should you make sure before retracting the ladder
ensure drain valve is open for waterway and all personnel are removed
aerial generator watts, volts, and amps
10,000/6,000 watts
240/120 volts
80/40 amps
