Home › CDL Practice Tests › Air Brakes Questions › Question 172
Why should only a properly trained and qualified person adjust or repair brakes for continued service?
- A.Any driver is required to rebuild brake chambers on the roadside
- B.Adjustment is only a paperwork formality
- C.Qualified help matters only for hydraulic brakes
- D.Incorrect adjustment can leave a brake weak, dragging, or unbalanced, and brake work directly affects the safety of everyone on the road
Correct answer
D. Incorrect adjustment can leave a brake weak, dragging, or unbalanced, and brake work directly affects the safety of everyone on the road
Why
Brake adjustment changes stopping force, balance, and heat at every wheel, so errors have immediate safety consequences. A driver must be able to inspect and recognize defects, and out-of-adjustment brakes must be corrected through proper service channels.
Manual topic: Air Brakes - Slack Adjusters · From the Air Brakes practice bank (AB-172).