Home › CDL Practice Tests › Air Brakes Questions › Question 122
What is the correct action if the spring brakes drag and will not fully release after the knobs are pushed in?
- A.Drive faster to wear the drag away
- B.Stop and investigate low air pressure, a stuck valve, or a mechanical fault; do not drive with dragging spring brakes
- C.Pull the knobs out and in rapidly for ten minutes
- D.Ignore it if the truck still moves
Correct answer
B. Stop and investigate low air pressure, a stuck valve, or a mechanical fault; do not drive with dragging spring brakes
Why
Dragging springs overheat drums, destroy linings, and can start a wheel fire. The drag is a symptom with a cause that must be found, not a condition to push through.
Manual topic: Air Brakes - Spring Brakes and Parking Brakes · From the Air Brakes practice bank (AB-122).