CDL Air Brakes Test

6

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

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

2 / 40

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

3 / 40

Select the reason as to why air tanks need to be drained:

4 / 40

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

5 / 40

Select the true statement about dual air brake systems:

6 / 40

How do you test your service brakes?

7 / 40

Air tanks should be drained:

8 / 40

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

9 / 40

What are slack adjusters?

10 / 40

Where is compressed air stored?

11 / 40

Select the true statement in regards to brake drums:

12 / 40

Air tanks need to be drained:

13 / 40

What must vehicles with air brakes have?

14 / 40

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

15 / 40

A leak rate for a straight truck or bus air brake system should not exceed _____psi per minute when the engine is off and the brakes are released.

16 / 40

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

17 / 40

The compressor is connected to the engine via _____?

18 / 40

What are spring brakes?

19 / 40

You should_____when the low pressure warning is activated:

20 / 40

How do you determine if slack adjusters need to be adjusted?

21 / 40

Select the factor that is known to cause brakes to fail or fade. (more than one answer may be correct, but select only one)

22 / 40

What does the drain valve for air tanks remove?

23 / 40

The parking brakes should be used____in air brake vehicles.

24 / 40

____is the most common type of foundation brakes used by heavy vehicles.

25 / 40

Select the true statement about slack adjusters:

26 / 40

When does your vehicle's single brake system need an adjustment?

27 / 40

What are spring brakes?

28 / 40

Air pressure should build___with a dual air system.

29 / 40

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

30 / 40

What is the brake system that applies and releases the brakes when the brake pedal is used?

31 / 40

What does the service brake system do?

32 / 40

Should your air compressor stop working:

33 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

34 / 40

An example of a low pressure warning signal for air brakes is:

35 / 40

Select the part that is not a part of the drum brake:

36 / 40

At around____the governor allows the air compressor to start pumping again:

37 / 40

Select the true statement about dual air brake systems.

38 / 40

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

39 / 40

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

40 / 40

Select what you should do before leaving the vehicle unattended:

Your score is

The average score is 89%

5/5 - (1 vote)

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