Air Brakes Endorsement Test | Kentucky 2025 #1 Page 3 of 4
Train for FREE online with our Kentucky 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 KY 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.
13 . Alcohol evaporators are:
Some air brake systems include an alcohol evaporator. The evaporator introduces alcohol into the braking system to prevent the formation of ice, which can cause damage.
14 . While operating on a downgrade, you should brake until you reach a speed that is:
While driving downhill, you should hold down the brake pedal until your vehicle reaches a speed 5 mph below your safe speed, then release the brake pedal. Repeat this process.
15 . Air brakes use ____ to function.
The brakes in an air brake system use compressed air to function properly.
16 . An Anti-Lock Braking System (ABS):
Anti-Lock Braking Systems (ABS) are compatible with air brakes and help a driver maintain control of their vehicle by preventing wheel lockup.
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 . In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.
When inspecting a vehicle with a dual air brake system, you should wait for air pressure to build from 85 to 100 psi in both the primary and secondary systems. This should take about 45 seconds.
See the exact questions that will be on the 2025 Kentucky DMV exam.
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