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What does the air governor do?
- A.It limits the vehicle's road speed
- B.It controls when the compressor pumps air by setting the cut-in and cut-out pressures
- C.It drains the tanks automatically every mile
- D.It applies the brakes on steep grades
Correct answer
B. It controls when the compressor pumps air by setting the cut-in and cut-out pressures
Why
The governor tells the compressor to load and unload so tank pressure stays in the working range. Without it, the compressor would either run constantly or fail to keep up with brake use.
Manual topic: Air Brakes - Air Compressor and Governor · From the Air Brakes practice bank (AB-032).