Compressed air usually contains a certain amount of moisture and compressor oil, which can build up in the air storage tanks and damage the brake system. The tanks should be drained to clean out these accumulations. On a tank with a manual drain valve, draining should be performed at the end of each day of driving.

Because compressed air contains some water and the water collects in the tanks

Because the air gets old and needs to be replaced

Because compressed air contains some water and the water collects in the tanks

To allow for a change in pressure

Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.

Under all conditions, except for snow.

In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor governor.

It pumps air into the air storage tanks.

It moves air to the back of the truck.

The air storage tanks in an air brake system store compressed air to be used for braking. They hold enough air for the brakes to still be used several times if the compressor stops working.

Hold enough air for the brakes to be used several times if the compressor stops working.

Hold only enough air for one braking cycle.

Hold enough air for the brakes to be used several times if the compressor stops working.

Do not hold air unless there is an emergency.

Air Brakes Endorsement Test | Rhode Island 2025 #1 Page 2 of 4

Train for FREE online with our Rhode Island 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 RI Class A/Class B driver license in 2025, 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 | Rhode Island 2025 #1 Page 2 of 4

7 . Why should you regularly drain the air tanks?

8 . What kind of force do emergency brakes use?

9 . A driver can rely on front wheel braking to work:

10 . What does an air compressor do in an air brake system?

11 . The air storage tanks:

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

Search the best driving school in your neighbourhood

Wait, before you go