Air Brakes #1

Air Brakes Endorsement Test | South Dakota 2025 #1 Page 3 of 4

Train for FREE online with our South Dakota 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 SD Class A/Class B driver license in 2025, practice as much as.. Read More

Train for FREE online with our South Dakota 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 SD 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.

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13 . The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

When performing a static leakage test on a triple combination vehicle with air brakes, the leakage rate should be no more than 5 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.

14 . Air tank drains:

Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.

15 . If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be?

Bumpy When inspecting a vehicle with air brakes that has a belt-driven air compressor, you should check the condition and tightness of the belt. It should be in good condition.

16 . Why should you regularly drain the air tanks?

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.

17 . If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

If your vehicle has air brakes, the air compressor drive belt should be checked before each drive. Check the tightness of the belt and verify that it is in good condition.

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

In single air systems, air pressure should build from approximately 50 to 90 psi within three minutes.

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