FREE Air Brakes Endorsement Test Online | South Carolina 2024
Train for FREE online with our South Carolina 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 SC Class A/Class B driver license in 2021, 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.
1 . When a brake pedal is pressed and the S-cam is turned, the S-cam:
When a brake pedal is pressed and the S-cam is turned, the S-cam presses the brake shoes against the inside of the brake drum. This causes friction and will cause the vehicle to slow.
2 . What does ABS do?
The purpose of an Anti-Lock Braking System (ABS) is to prevent wheels from locking up during hard applications of the brakes, especially on slippery surfaces.
3 . What do the two systems of a dual air brake system share?
Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.
4 . Emergency brakes are:
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes.
5 . To use the stab braking method, you should:
The stab braking method for emergency stops involves fully applying the brakes until they lock up. The brakes are then released until the wheels start rolling, and then the process is repeated.
6 . Water and compressor oil are usually found in the compressed air within an air brake system. Water and compressor oil:
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
See the exact questions that will be on the 2024 South Carolina DMV exam.
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