Air Brakes Endorsement Test | Arkansas 2025 #2 Page 3 of 4
Train for FREE online with our Arkansas 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 AR 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 . When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.
14 . The air compressor governor controls:
In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.
15 . If the brake pads rub against the brake drums and create too much heat:
Brakes heat up with use. If they are overused and become too hot, expansion and chemical changes will make them less effective and eventually cause them to stop working altogether. This is known as "brake fade."
16 . The service brake system:
Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system. The service brake system applies and releases the brakes when you use the brake pedal while driving normally.
17 . Pressing and releasing a brake pedal unnecessarily can:
In an air brake system, pressing and releasing the brake pedal unnecessarily can release air from the braking system faster than the compressor can replace it.
18 . When starting a vehicle with dual air brakes, pressure of ____ should be built up in the system before it is driven.
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.
See the exact questions that will be on the 2025 Arkansas DMV exam.
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