CDL Air Brakes Test practice questions
252 free questions with answers and explanations.
- 251.A commercial driver is operating a vehicle equipped with air brakes on a gravel road and needs to apply the brakes to slow down. The vehicle does NOT have an Anti-lock Braking System (ABS). Which braking technique is most appropriate to maintain steering control and prevent wheel lock-up?Using Air Brakes
- 252.A driver is performing a pre-trip inspection on a vehicle equipped with air brakes. After fully charging the air system to 125 psi, the driver turns off the engine, releases the parking brake, and applies the service brake firmly for one minute. The air pressure gauge shows a drop of 5 psi. What conclusion should the driver draw from this observation?Inspecting Air Brake Systems