Home › CDL Practice Tests › Air Brakes Questions › Question 111
How can a driver test that the parking brakes hold during an inspection?
- A.Race the engine with the brakes set
- B.Release the service brakes on a steep hill
- C.Listen for the springs from outside the cab
- D.Set the parking brakes, put the vehicle in a low gear, and gently try to move against them to confirm they hold
Correct answer
D. Set the parking brakes, put the vehicle in a low gear, and gently try to move against them to confirm they hold
Why
A gentle tug against set parking brakes proves holding power without abusing the equipment. If the vehicle creeps easily, the parking system needs adjustment or repair.
Manual topic: Air Brakes - Spring Brakes and Parking Brakes · From the Air Brakes practice bank (AB-111).