Home › CDL Practice Tests › Air Brakes Questions › Question 40
During the engine inspection, how should the driver check a belt-driven compressor or other engine belts?
- A.Check that belts are as loose as possible
- B.Check that belts are tight and in good condition, with no cracks or excessive looseness
- C.Belts never need checking if the engine runs
- D.Only check belts after a breakdown
Correct answer
B. Check that belts are tight and in good condition, with no cracks or excessive looseness
Why
A slipping or broken belt can stop the compressor, alternator, or water pump without much warning. Catching fraying and looseness at inspection prevents an air loss emergency on the road.
Manual topic: Air Brakes - Air Compressor and Governor · From the Air Brakes practice bank (AB-040).