Air Brake Practice Test 04

The free Air Brake Practice Test provides detailed explanations of the correct answers, allowing you to learn from your mistakes and hone your knowledge in areas where you need extra help. By taking advantage of this valuable tool, you’ll be well-equipped to pass the official air brake test and advance your driving career.

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Air Brake Practice Test 04

1 / 30

Some spring parking brakes can be released mechanically by doing what?

2 / 30

Which statement is false? When parking a vehicle with over heated brakes...

3 / 30

What happens to allow reservoir air pressure to flow to the spring parking brake chambers?

4 / 30

The effectiveness of the spring parking brake depends on what?

5 / 30

Spring parking brake chambers should never be disassembled without first doing what?

6 / 30

Some systems may have an additional valve controlled by a blue button that applies what?

7 / 30

Disassembly of a spring brake chamber should be done by...

8 / 30

. In the spring parking brake system, the brakes are applied by spring pressure and retracted by what?

9 / 30

What is meant by compounding?

10 / 30

With an automatic limiting valve, brake applications between 40 psi and 60 psi are reduced to...

11 / 30

Is the installation of spring parking brakes and their piping arrangements done the same in all vehicle air brake systems?

12 / 30

Which statement is false? How quickly the spring brakes will stop the vehicle depends on such factors as...

13 / 30

On the pre-trip air brake inspection, you must ensure that the parking brake spring is not...

14 / 30

What is an automatic limiting valve?

15 / 30

The spring parking brake system can also act as what?

16 / 30

During normal service brake operation, wat happens to the parking brake spring?

17 / 30

Parking brakes should be in what position before making a service brake application?

18 / 30

Anytime the reservoir pressure drops to approximately 35 psi, what happens?

19 / 30

What can be accomplished by installing a control valve in the cab and a front brake limiting valve on the front axle?

20 / 30

What should the brake chamber be fitted with to ensure debris will not enter the chamber?

21 / 30

Instruction on how to cage is usually found where?

22 / 30

The control valve is set in what position for dry road surfaces?

23 / 30

What should always be done when caging the parking brake spring?

24 / 30

How are the brakes caged?

25 / 30

After overheating the brake drums, when should you set the spring parking brake?

26 / 30

Where does the air in the control line 'dead end' to?

27 / 30

How many uses does the relay valve have?

28 / 30

What is the danger of disassembling a spring parking brake unit?

29 / 30

when the brake drum has expanded because of extreme heating, when the brake drum starts to cool and contract, the pressure exerted by the spring parking brake may cause the brake drum to do what?

30 / 30

What is another word for when the spring compresses?

Your score is

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