Home › CDL Practice Tests › Air Brakes Questions › Question 53
If the safety valve is popping off repeatedly during a trip, what should the driver do?
- A.Tie the valve shut and keep driving
- B.Ignore it, because venting is normal operation
- C.Stop safely and have the system repaired; do not continue driving or block the valve
- D.Speed up so the compressor rests
Correct answer
C. Stop safely and have the system repaired; do not continue driving or block the valve
Why
Repeated venting means pressure control has been lost and tank stress is rising. Blocking the valve removes the only protection against a dangerous over-pressure failure.
Manual topic: Air Brakes - Safety Valve and Low Pressure Warning · From the Air Brakes practice bank (AB-053).