An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.

The air pressure has become too high.

The brakes are fully operational.

Some air brake systems contain an alcohol evaporator. An evaporator introduces alcohol into the system to help inhibit the formation of ice in cold weather.

Prevent ice from forming in the brake system.

Make the brakes work without squeaking.

Prevent ice from forming in the brake system.

Prevent people from breathing the air from the system.

Air Brakes Endorsement Test | Hawaii 2024 #1 Page 3 of 4

Train for FREE online with our Hawaii CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a HI Class A/Class B driver license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

Air Brakes Endorsement Test | Hawaii 2024 #1 Page 3 of 4

13 . If the safety relief valve in the air brake system releases air:

14 . Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.

15 . During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.

16 . Some air brake systems introduce alcohol into the system to:

17 . Air pressure should build up in a single air system within:

18 . What can happen if the air pressure gets too low in an air brake system?

See the exact questions that will be on the 2024 DMV exam.

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