Home › CDL Practice Tests › Air Brakes Questions › Question 94
How long is each leakage measurement timed for the standard test?
- A.One minute of gauge observation after conditions are set and pressure has stabilized
- B.Ten minutes for every test
- C.Five seconds is enough to judge
- D.Until the tanks are completely empty
Correct answer
A. One minute of gauge observation after conditions are set and pressure has stabilized
Why
The limits are all expressed per minute, so the observation window must match that unit. Cutting the timing short hides slow leaks that still exceed the standard over a full minute.
Manual topic: Air Brakes - Air Leakage and Brake Tests · From the Air Brakes practice bank (AB-094).