Home › CDL Practice Tests › Air Brakes Questions › Question 47
What does it mean when the compressor cuts out normally at the top of the range?
- A.The engine should be shut off immediately
- B.The tanks are empty and must be refilled by hand
- C.The spring brakes have just applied
- D.Tank pressure has reached the governor's maximum and the compressor unloads until pressure falls to cut-in
Correct answer
D. Tank pressure has reached the governor's maximum and the compressor unloads until pressure falls to cut-in
Why
Cut-out is a normal, healthy event the driver may hear as the compressor unloads and the dryer purges. The system is then coasting on stored air until use drops pressure to cut-in again.
Manual topic: Air Brakes - Air Compressor and Governor · From the Air Brakes practice bank (AB-047).