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RGC A/O > Air Brakes System > Flashcards

Air Brakes System Flashcards

1
Q

What kind of braking system are the trucks equipped with?

A

Duel Circuit Air Brake (Primary & Secondary)

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2
Q

What kind of brakes are in the rear parking system?

A

Spring Brakes

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3
Q

When braking downhill or during heavy braking times, always rely on what effect?

A 
Braking effect of:
Engine
Engine Brake
Exhaust Brake
Retarder
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4
Q

If service brakes are required, how should the brakes be applied?

A

Applied in short durations
5 to 10 seconds
Not continuous application

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5
Q

The brake lining material is used to provide what?

A

Best balance of stopping distance
Grade holding capacity
Lining Life

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6
Q

When applying the brakes, what kind of pressure is recommended?

A

Firm, constant pressure

NO “pumping”

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7
Q

When “pumping” the brake pedal, what can happen to the air reservoir supply?

A

May deplete the brake systems air reservoir supply

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8
Q

The front axle and rear axle brake circuits are each supplied air by what?

A

Separate Air Resevoirs

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9
Q

What is the safe operating gauge for the air system?

A

90 to 120 psi

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10
Q

Which system supplies the front axle?

A

Secondary System

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11
Q

Which system supplies the rear axle?

A

Primary System

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12
Q

When the pressure drops below approximately what psi, a warning buzzer and light will come on?

A 
65 PSI (LTI)
60 PSI (Pierce)
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13
Q

At what PSI will the warning buzzer and light shut-off?

A

Increases past 65-75 PSI

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14
Q

Where is the air pressure gauge located?

A

Right Side of the Dash

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15
Q

The white needle goes to which air system?

A

Primary (Rear Axle)

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16
Q

The red needle goes to which system?

A

Secondary (Front Axle)

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17
Q

Quick buildup allows pressure to be built in which air tanks first, to be enable to release the parking brakes before pressure in which tanks are adequately charged?

A

Rear Brake Tanks (Primary/White Needle)

Front Brake Tanks (Secondary/Red Needle)

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18
Q

Operators discretion must be used as the need to operate the apparatus when there is what PSI air pressure in both brake circuits?

A

Less than 90 PSI

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19
Q

You should use extreme caution when operating less than what PSI?

A

Less than 60 PSI

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20
Q

Antilock Brake System automatically applies and releases the brakes during what kind of scenarios to prevent wheel lock-up?

A

During low traction or panic brake application

21
Q

Antilock Brake System info:

A

Improves braking efficiency and steering control

Integral to air brake system

Can not be turned OFF or overridden, no ON or OFF switch

22
Q

What happens to the Telma when the ABS is applied?

A

Automatically deactivates

23
Q

Where are the spring brakes located?

A

Rear Axle

24
Q

How are the spring brakes applied and released?

A

Yellow Parking Brake valve

Located on engine doghouse instrument panel

25
Q

Pushing the yellow valve knob IN will ___ the spring brakes

A

Release

26
Q

Pulling the yellow valve knob OUT will ___ the spring brakes

A

Apply

27
Q

What is the parking brake circuit intended to do?

A

Hold vehicle in a parked position ONLY & NEVER be used for normal driving

28
Q

What happens if air pressure is lost in the rear (primary) service brake section?

A

The spring brakes will be modulated by pressure from the secondary reservoir allowing a few brake applications before the spring brakes are automatically applied

29
Q

If pressure is reduced to approximately __ PSI in both systems, what is automatically apply?

A

40 PSI

The Spring Brake valve

30
Q

Info on Air Reservoir Moisture Draining:

A

Moisture is normal (even equipped with air dryer)
Open petcocks
Drain out condensate

31
Q

What does the Air Dryer do?

A

Removes moisture & contaminants from pressurized air (comes from compressor before it reaches air reservoirs)

Moisture discharged out the bottom of the air dryer each time the governor unloads

Replaced every other year (2 to 3 years/Pierce)

32
Q

What is the Aux Front Wheel Locks used for?

A

To keep front brakes applied

Augment rear spring brakes in event rear parking brakes, cannot hold the apparatus o steep incline

33
Q

What should be running when using the Aux Front Wheel Lock?

A

Engine should be running

If air leak, aux front wheel locks may fail

34
Q

What must be applied first before using the Aux Front Wheel Lock?

A

Spring Brakes MUST be applied first

Pull OUT yellow, Push IN black

When released, push IN yellow, black will “pop” out , auto release

35
Q

For the Disc Brake Calipers Lube, what shouldn’t you use, because it will not provide adequate lubricator

A

Lithium Grease

S&M lube during Aerial Ladder Test & Brake replacement

36
Q

It is the responsibility of the operator to asses the :

A

Condition (thickness) of the brake lining
Proper operation of brakes’
If the brakes are in proper adjustment

37
Q

When should you Chock the apparatus?

A

Whether on level terrain or on a grade, ALWAYS chock the wheels

Department Policy, to always chock wheels when on scene

38
Q

Which brakes apply the spring brakes parking system?

A

Rear

39
Q

Aerial Ladder Truck Antilock Braking Systems are found in which years?

A

2000 to 2016

40
Q

Aerial Ladder Truck Auxiliary Front Axle wheel lock systems are found in which years?

A

2000 to 2016

41
Q

Which axle is supplied by the secondary air supply?

A

Front Axle

42
Q

Use extreme caution when operating less than ___ psi air pressure

A

60

43
Q

Antilock Brake Systems improves both brakes efficiency and ?

A

Steering

44
Q

Antilock brakes systems ____ & ____ the brakes during low traction or panic brake applications to prevent wheel lock-up

A

Applies & Releases

45
Q

If air pressure is reduced to approximately ___ psi in both systems, the springs brakes valve will atomically apply

A

40 PSI

46
Q

Auxiliary Front Wheel locks uses air brakes system ___ to keep the front brakes applied

A

Pressure

47
Q

Auxiliary Front Wheel locks are sued to augment ____ in the event the rear parking brakes cannot hold the apparatus on a steep incline

A

Spring Brakes

48
Q

What does FMVSS stand for?

A

Federal Motor Vehicle Safety Standard

RGC A/O (45 decks)

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