Home › CDL Practice Tests › Air Brakes Questions › Question 33
At about what pressure does the governor cut out and stop the compressor from pumping on a typical system?
- A.About 120 to 135 psi
- B.About 60 psi
- C.About 85 psi
- D.About 150 psi
Correct answer
A. About 120 to 135 psi
Why
Cut-out is the top of the normal working range, generally around 120 to 135 psi depending on the system. The safety valve at about 150 psi sits above that range as a backup, not as the normal control.
Manual topic: Air Brakes - Air Compressor and Governor · From the Air Brakes practice bank (AB-033).