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random truck q's Flashcards

1
Q

Normal operating pressure of 4806

sec. relief valve

A

2900 psi

3150psi

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2
Q

Normal operating pressure of 4417

sec. relief valve

A

2750 psi

3100 psi

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3
Q

Normal operating pressure of 4105

sec. relief valve

A

2500 psi

2700 psi

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4
Q

type of hydraulic fluid used

A

shell tellus T22

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5
Q

The power steering hydraulic pump is _____ driven, coupled to the vehicles ______, it provides the flow and pressure to power the system. The steering wheel and _____ unit is assisted by the fluid pressure provided by the pump

A

Gear
Engine
Steering gear box unit

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6
Q

A _____ type water pump circulates engine coolant thru the oil cooler, ______, _______, and water manifold

A

centrifugal
cylinder block
cylinder head

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7
Q

Cool air is circulated thru the radiator by a suction fan which is _____ from the crankshaft

A

belt driven

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8
Q

overhead clearance to tilt the cab 4417 + 4806

A

15’ 8”

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9
Q

overhead clearance to tilt cab 4105

A

15’

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10
Q

Green indicator lights to show truck is inline within 30, 15 each side of center are located where

A

Cab dash
tiller dash
each stabilizer compartment

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11
Q

ladder extension, retraction system is accomplished thru _____ and ______

A

cables and double acting hydraulic cylinders

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12
Q

when the ladder is raised out of its bed/cradle the ______ sends a signal to interlock valve to prevent stabilizers from being operated

A

proximity switch

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13
Q

Outriggers will extend in _____ secs at idle, ______ secs with high idle switch on #4417

A

5 secs

3 secs w/ high idle on

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14
Q

With high idle switch on, RPMs increase, what does this do for aerial operations

A

Increase speed slightly and allow for multi function operation

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15
Q

The _____ shuttle valve is mounted directly to the _____ which in turn is mounted to the _______ housing

A

rotation
rotation motor
rotation gear box

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16
Q

Emergency overload warning horn and light will activate if:

A

a pressure switch closes in the bottom of the hoisting cylinders due to overloading the tip of the ladder (80% of max tip pressure) or over 80* of inclination

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17
Q

The light comes on and warning horn blows warning operator when ladder is overloaded, where are they located

A

Ladder overload light on top right (of all indicator lights) of pedestal
warning horn is inside pedestal (bottom R by foot)

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18
Q

When bedding the aerial, the bottom cylinder pressure should read ____ psi

A

0 psi

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19
Q

Steps for emergency hydraulic operation on 4417

A 
Engine OFF
Ignition ON
Neutral
Front Brake
Main PTO ON
PTO to EMERGENCY
Deadman foot switch
operate desired control lever
switch on emergency pump toggle on pedestal
Allow cool down periods between ops
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20
Q

To start 4417, 4806 at pedestal steps

A

Ignition ON

Engine start on pedestal

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21
Q

when front brake is on its engaging what

A

steering axles, front tractor and rear trailer

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22
Q

The aerials capacity is reduced for wind in excess of ____ mph or operation on a slope in excess of _____ degrees. 4806, 4417, 4105

A

20 mph
greater than 3.5* slope T11/T12

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23
Q

what is range of elevation for aerial on 4806

A

-5* to 80*

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24
Q

what is range of elevation for aerial on 4417

A

0* to 80*

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25
Q

What is nfpa standard for Testing aerial ladders

A

1914

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26
Q

If regen light is flashing with check engine light on how long till you must regen

A

Approximately 4 hours to regen or red STOP ENGINE light will illuminate, soot level 4 is reached and regen immediately or soot level will continue to rise and get locked out. Call robert

27
Q

What type of hydraulic pump powers the entire hydraulic system

A

Positive displacement rotary vane pump, variable demand style. (Uses the amount of hydraulic fluid it needs)

28
Q

Once aerial master is engaged on 4806 what is standby pressure until what happen

A

350 psi until outrigger control is operated and pump will produce the 2900 psi

29
Q

what does deadman switch prevent a pedestal

A

prevents control levers from operating without deadman being depressed

30
Q

what is function of the 2 hoisting counter balance valves

A

lock and hold the oil in the hoisting cylinders and only allow movement of the cylinders when control valve is operated

31
Q

what valve is mounted on the extension cylinders? whats its function?

A

Pilot operated check valve

Locks and holds oil in the cylinders to prevent movement until control lever is operated

32
Q

the flow of oil goes from the extension control valve thru what valves to get ladder extension

A

control valve to counter balance check valves to pilot operated check valves on the extension cylinders. CBV are set at slightly higher press. than pilot valve so they operate simultaneously

33
Q

Ladder is in unsupported position means

what gauge shows this

A

its positioned OFF an objective

lower cylinder gauge

34
Q

Steps for emergency hydraulic ops on 4806

A 
Engine OFF
Ignition ON
Aerial Master
Front brake
Engage emerg. hydraulic switch
Press deadman switch
pull control valve
activate emergency toggle switch 
allow cool down periods
35
Q

If outriggers are not fully deployed (short jacked), the range of motion for aerial operations is

A

15* from center line of truck to the side thats short jacked, 180* ops to opposite side

36
Q

There are ___ interlock control valves?

what is there operation

A

2
Stabilizer interlock- cant use outriggers if ladder is out of cradle
Turntable/aerial interlock- ladder wont operate without outriggers down and 800 psi of pressure

37
Q

what is first # reading on ladder for extension distance

how far apart are they

A

51’

7’ apart

38
Q

what outrigger goes down first when truck is not level

A

Low side

39
Q

Outrigger goes up last when truck is not level

A

Low side

40
Q

If inclinometer bubble shows it to the right side, which is side is low

A

Right side (low side is side of bubble)

41
Q

Limitation of aerial if tractor is jackknifed 45-60, 4417

A

180* operation to side opposite the tractor is placed

42
Q

Limitation of aerial if tractor is setup 45* or less, 4417

what do you need to do

A

360* operation

need to use overrides to get ladder out of cradle if over 15*

43
Q

what are the different parts that make up the system that rotates the turntable

A

rotation shuttle valve is mounted to
rotation motor which is mounted to
rotation gear box assembly

44
Q

weight limits of aerial 0-45*

A

250 lbs or 1000 gpm ladder pipe

45
Q

weight limits of aerial at 60*

A

250 lbs on all 4 sections evenly spaced or

500 lbs on the tip

46
Q

weight limits of aerial at 45-80*

A

250 lbs and 1000 gpm ladder pipe

47
Q

aerial at 75-80* w/o water capacity

A

250 lbs on each section and 750 lbs at tip

48
Q

Portable generator and amps on 4806

onboard generator

A

Honda 3000 25 amps

Onan 8000 67 amps

49
Q

Portable generator and amps on 4417

onboard generator

A

Honda 3500 29 amps

Onan 7500 62.5 amps

50
Q

Portable generator and amps 4105

onboard generator

A

Honda 2500 20 amps

Generac 7500 62.5 amps

51
Q

onboard generator will shut down automatically when fuel is at

A

1/4 tank

52
Q

Ring called on turntable that allows movement w/o twisting up all the lines

A

computator ring

53
Q

What switches need to be engaged prior to leaving the cab for aerial ops on 4417

A 
Neutral
Maxi
Front brake
PTO
Master switch (already on)
54
Q

What switches need to be engaged prior leaving the cabe for aerial ops on 4806

A 
Neutral
Maxi
Front brake
Aerial master
Master switch
55
Q

How much rope in belay and life line bags

A

400’ static kernmantle

56
Q

Upper beam is subject to ______ when aerial is in an unsupported position

A

tension

57
Q

Lower beam is subject to ______ when aerial is in an unsupported position

A

compression

58
Q

Length of each ladder section on the aerial is roughly how long?

A

31’ 6”

59
Q

What is the pressure on lower cylinder gauge on 4417/ 4105 for overload warning horn and light to go off?

A

1950 psi

1850 psi

60
Q

What is pressure on bottom cylinder gauge for ladder overload horn and light to activate on 4806?

A

1800 psi

61
Q

what is emergency hydraulic pump

A

12 volt electric rotary vane positive displacement pump

62
Q

Per nfpa the aerial’s height is measured how?

A

Measured at 80* from the top rung to the ground. Measures 100’ to the ground

63
Q

Max slope for T11/T12

A

3.5 degrees
22 in over 30 ft

Truck (1 decks)

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