A straight truck or bus air brake system should not leak at the rate of more than ____ psi per minute with the engine off and the brakes released.

Question

Accepted Answer

A: 2. Assuming that the air system is at normal operating pressure and the engine is off, then release all brakes and wait for the air gauge to stop moving. Once stopped, begin timing for 1 minute and the gauge should not lose more than 2 psi for a single vehicle.

A straight truck or bus air brake system should not leak at the rate of more than ____ psi per minute with the engine off and the brakes released.

Illinois CDL Air Brakes Test Info