CDL Air Brakes Test

11

This is the Commercial Vehicle Driver's License Test covering Air Brakes.  You will be presented with 40 questions and you must answer 34 questions correctly to pass.  There is no time limit.  You may not go back once you answer a question.  Click the "Start Quiz" button below to begin.  Good luck!

1 / 40

When does stab braking occur?

2 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

3 / 40

After the initial drop, the maximum leakage rates per minute is:

4 / 40

Select the true statement in regards to an application pressure gauge:

5 / 40

Select how you can tell if your vehicle is equipped with an anti-lock braking system:

6 / 40

Select the factors that can cause your brakes to fade or fail:

7 / 40

Select the answer that is not a part of the braking process when driving a tractor-trailer combination vehicle that has ABS:

8 / 40

At what "cut out" level does the governor stop pumping air?

9 / 40

What does the drain valve for air tanks remove?

10 / 40

The best way to test if the spring brakes come on automatically is to:

11 / 40

Select the true statement in regards to your brake function when your ABS fails

12 / 40

With the engine cutt off and the brakes released the air loss in a straight truck or bus should not be more than:

13 / 40

What does the air compressor governor control?

14 / 40

What does the service brake system do?

15 / 40

What are slack adjusters?

16 / 40

Why are you required to take an exam about air brakes?

17 / 40

Select the purpose of fanning air brakes:

18 / 40

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

19 / 40

Air brake systems should not lose air faster than____when testing for air leakage rates in combination vehicles before applying the brake pedal.

20 / 40

How do you check the air compressor governor "cut in" and "cut out" pressures?

21 / 40

The best way to test the low air pressure warning signal is to:

22 / 40

How often should air tanks be drained?

23 / 40

Where is compressed air stored?

24 / 40

Select when you should use the parking brake:

25 / 40

The parking brakes should be used____in air brake vehicles.

26 / 40

How do you know when your brakes are fading?

27 / 40

Select the inappropriate way to test for the low pressure warning signal.

28 / 40

Select which vehicles are required to have a low air pressure warning signal:

29 / 40

Select the statement that is not part of the air-brake system:

30 / 40

Commerical vehicles typically have this type of brake.

31 / 40

Why do air brakes take longer to stop than hydraulic brakes?

32 / 40

Should the air pressure in the service air tanks fall below____the driver must be alerted via warning mechanism in the truck cab.

33 / 40

Select what you should do before leaving the vehicle unattended:

34 / 40

Select the true statement about what the Air Compressor Governor controls:

35 / 40

Air tanks need to be drained:

36 / 40

You should be in the proper gear before going down a hill because:

37 / 40

Select the true statement about dual air brake systems:

38 / 40

An air system that is fully charged will typically have ___ psi of pressure.

39 / 40

Alcohol evaporators in some air brake systems help to:

40 / 40

How can you check slack adjusters?

Your score is

The average score is 79%

5/5 - (1 vote)

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