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Airbrakes > Airbrakes > Flashcards

Airbrakes Flashcards

1
Q

What is the best way to test your vehicles low air pressure warning signal?

Answer with the engine off tom still on and off the brake pedal to lower air pressure below 60 PSI

A

The purpose of a supply pressure gauge is?

Answer to tell you how much air is in the tank

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2
Q

What is the best way to test if your vehicle spring breaks come on automatically? Engine off

step on and off the brake pedal until no pressure is mitt spring breaks deploy

On single vehicles continue to step on and off the brake pedal until parking brake pops out

Tractor-trailers continue to step on and off the brake pedal until parking brake valve has popped up

A

The tractor protection valve?

Provides air supply for the brake system

Closes if you apply parking brakes

Will close the sale automatically if the air supply drops to a certain level

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3
Q

The Maximan leakage rate per minute after the initial pressure drop are?

Answer
3 PSI for single vehicles
4 psi for combination

A

At what measurement PSI is the safety valve usually set to open?

Answer 150 psi

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4
Q

Modulating control valve allows you to control the?

Answer spring breaks

A

Excessive use of the service brakes result in overheating, which can lead to?

Answer expansion of the brake drums

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5
Q

Airbrake equipped vehicles have?

Answer an air supply pressure gauge

A

Air compressor stopped pumping at ____PSI

hand book Answer 125 psi
Cut out at 125 psi
Pump starts –cut-in at 100 psi

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6
Q

A driver must be able to see a warning before the pressure in the service of tanks falls below ____ PSI

60 PSI

A

To correct the drive wheel Breaking skid, you should?

Answer stop breaking, turn quickly, and countersteer

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7
Q

The air brake lag distance at 55 mph on dry pavement ads about_____ feet.

32

A

You know your brakes are feeding When?

You have to press the brake pedal harder to control speed on a downgrade

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8
Q

Hand book
For the air brake system in good condition, the air compressor should start pumping at about 100 psi

100 psi

A

If your bus or truck has dual control valves, you can use pressure from a separate tank to? Answer release the spring emergency/parking brakes to move a short distance

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9
Q

Moderne air brake systems are three different systems combined: service break, parking brakes, and the _____brakes

emergency brakes

A

To engage the parking break under normal conditions, the driver must first?

Answer let the air out of the spring breaks

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10
Q

The air compressor stopped pumping at____ PSI?

Answer 125

A

To test the service breaks?

Answer break from you while slowly moving forward

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11
Q

How should you check that the spring breaks come on when the air pressure in the system drops below a certain level?

Answer park on level ground, chalk the wheels come release the parking break when you have enough air pressure, shut off the engine, repeatedly Press and release the brake pedal

A

If your truck has a properly functioning functioning dual air brake system and minimum size air tank, the air pressure should build from 85 to 100 psi 45 seconds?

Answer 45 seconds

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12
Q

Your truck has a dual air system, and one of the system uses its pressure. What will happen?

Answer either the front or rear break will not be fully optional

A

Before you drive a truck or bus with dual air brake system, the pressure in each air brake system should be at least 100psi

Answer 100 psi

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13
Q

Tractor in street truck springs will come for me on when the air pressure drops to the range of 20 to 45 PSI

Answer 20 to 45 psi

A

What is the danger non-functioning low pressure warning signal?

Answer this can cause sudden emergency braking in a single circuit air system

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14
Q

The safety valve is set to automatically reduce pressure at 150 psi

answer 150 psi

A

In ideal conditions, a truck or bus equipped with that airbrake and traveling at 55 mph would require what stopping distance?

Answer more than 450 feet

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15
Q

The driver must be able to see it warning before the pressure in the service air tank falls below 60 PSI?

Answer 60 PSI

A

To engage the parking brakes under normal conditions, the driver must first?

Answer let the air out of the spring breaks

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16
Q

The emergency brake system?

Answer uses parts of the Service brake and parking brake system to stop the vehicle in the event of a brake system failure

A

Before driving a truck or a bus with dual air brake system, the pressure in each air brake system should be at least 100 psi?

Answer 100 psi

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17
Q

The emergency brake system?

Answer uses parts of the service break and parking brake systems to stop the vehicle in the event of brake system failure

A

Your truck has a properly functioning air brake system minimum size air tanks, air pressure should build from 85 psi to 100 psi within 45 seconds.

Answer 45

18
Q

Emergency controlled Breaking is when you?

Answer apply the brakes as hard as you can without locking the wheels

A

Emergency controlled breaking is when you, Apply the brakes as hard as you can without locking the wheels

19
Q

What is the purpose of alcohol evaporator?

To reduce the risk of ice in the brake valve and other parts in cold weather

A

What is the purpose of an alcohol evaporator, to reduce the risk of ice in the brake valve and other parts in cold weather

20
Q

The emergency brake system?

uses parts of the service break and parking brake system to stop the vehicle in the event of brake system bill you

A

The emergency brake system, uses parts of the service break and parking brake system to stop the vehicle in the event of a brake system failure

21
Q

The breaking power of the spring breaks?

depends on this service breaks being in adjustment

A

The The breaking power of the spring breaks, depend on the service breaks being an adjustment

22
Q

The purpose of a supply pressure gauge is?

To tell you how much air is in the tank

A

Supply pressure gauge, will tell you how much air is in the tanks

23
Q

The airbrake lag distance at 55 mph on dry pavement adds about? 32 feet
Answer 32 feet

A

The airbrake lag distance at 55 mph on Drive pavement as about 32 feet to stopping distance

24
Q

You know that your air breaks or feeding when?

You have to press the brake pedal harder to control speed on a downgrade

A

You know that your breaks or or fading when, you have to press the brake pedal harder to control speed on a downgrade

25
Q

If your truck has A duel parking control valves, you can use pressure from a separate tank to?

Release the spring emergency/parking break to move a short distance

A

If your truck has duel parking control valves, you can use the pressure from a separate tank, to release the spring emergency/parking brakes to move a short distance

26
Q

To engage the parking break the driver must first? let the air out of the spring breaks

Answer let the air out of the spring breaks

A

To engage the parking brakes under normal conditions, the driver must first let the air out of the spring breaks.

27
Q

To test the air service breaks,?

Break firmly wall so you moving forward

A

To test the service breaks, break from me while slowly moving forward

28
Q

How should you check the spring break come on when the air pressure in the system drops below a certain level?
Park on level ground, chalk the wheels, release the parking break when you have enough air pressure, shut off the engine, and repeatedly pressure release the brake pedal

A

How should you check the spring break come on when the air pressure in the system drops below a certain level, park on level ground, chalk the wheels, release the parking break when you have enough air pressure, shut the engine off, and repeatedly press and release

29
Q

What is the danger of non-functioning low pressure warning signal?

This could cause sudden emergency braking in a single circuit air system

A

What is the danger of non-functioning low pressure warning signal, it could cause sudden emergency braking in a single circuit air system.

30
Q

Modern air brake system are 3 different systems combine, the service brake parking brakes and emergency brakes
answer emergency brakes

A

Modern air brake system are three different systems combine, the service brake parking brakes and emergency brakes

31
Q

In air brake system is fully charged at 125 psi

answer 125 psi

A

Air brake system is fully charge of 125 psi

32
Q

If the air compressor should develop a leak, what keeps the air in the tanks?
Answer the one way checked out

A

If the air compressor should develop a leak, what keeps the air in the tanks? The one we checked out

33
Q

If your vehicle has a alcohol about raider evaporator, every day during cold weather, you should?

Answer check and feel the alcohol level

A

If your vehicle has a alcohol evaporator, every day during cold weather, you should check and fill the alcohol

34
Q

What are spring break?

Answer if the air brakes leak down, spring apply the brakes to stop the vehicle

A

What are spring breaks, if the rear brakes leak down, Springs apply the brakes to stop the view

35
Q

The airbrake leg distance at 55 mph on dry pavement adds about 32 feet

answer 32 feet

A

The airbrake leg distance at 55 mph on dry pavement adds about 32 feet to the stopping distance

36
Q

Slack adjusters are?

Between the pushrod and the S-cam on drum brakes

Between the power screw and push rod on disc brakes.

Part of your brake system used to just brakes. And all the above

A

Slack adjusters are?

Between the pushrod and S-can on drum brakes

Between the power screw and push rod on disc brakes

Part of your rear brake system used to adjust the brakes

37
Q

Handbook controlled breaking apply the brakes as hard as you can without locking the wheels

A

Breakheart do not lock up wheels keep staring to a minimum

38
Q

Handbook stab breaking

Apply your brakes all the way release the brakes when you will locks up

A

Apply brakes all the way release brakes when lock it could take as long as the second or the wheels to start to roll again

39
Q

Handbook factors for total stopping distance perception, Reaction, break lag, braking distance
equals total stopping distance

A

Total stopping distance perception, reaction, break lag, braking distance

40
Q

Hand book Total stopping distance break lag at 55 mph total stopping distance of over 450 feet

A

Break a leg at 55 mph Adds 32 feet, total stopping distance over 450 feet

Airbrakes (3 decks)

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