Air Brakes #2
Air Brakes Endorsement Test | Maryland 2025 #2 Page 4 of 4
Train for FREE online with our Maryland 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 MD 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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19 . Front wheel braking works:
Under most conditions.
Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.
20 . What color are ABS malfunction lamps?
Blue
Vehicles with Anti-Lock Braking Systems (ABS) have yellow malfunction lamps.
21 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in one minute.
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
22 . The most common type of foundation brake used is the:
P-cam disc brake.
The most common type of foundation brake is an s-cam drum brake.
23 . Air tank drains:
Must remain open during driving.
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.
24 . What kind of force must emergency brakes use?
Electrical
