An air compressor governor will stop the compressor from pumping air once the air tanks are at an air pressure level around 125 psi. This air pressure level is referred to as the "cut-out" level.

Stop the compressor from pumping air.

Begin pumping air into the tanks.

Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work.

The time required for the brakes to work after the brake pedal is pressed

The distance between the brake pedal and the floor

The amount of air pressure used to stop the vehicle

When parking on a level surface, you should use wheel chocks. If the vehicle is not equipped with spring brakes, this is essential to prevent the trailer from moving.

Use wheel chocks to prevent your vehicle from moving.

Use wheel chocks, but only if you have applied the parking brake.

If used and maintained properly, air brakes are a safe and effective way to stop large, heavy vehicles.

Air brakes are very effective systems.

Other brake systems squeak too loudly.

Air brakes are very effective systems.

Other braking systems are hard to come by.

Air Brakes Endorsement Test | Idaho 2024 #2 Page 2 of 4

Train for FREE online with our Idaho 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 ID 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 | Idaho 2024 #2 Page 2 of 4

7 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

8 . What is brake lag?

9 . The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:

10 . When parked on a flat surface, you should:

11 . Why do large vehicles use air brakes?

12 . In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

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

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