Home › CDL Practice Tests › Air Brakes Questions › Question 145
During your en route checks, why should you pay attention to how the brakes feel and whether a wheel or hub is unusually hot?
- A.A hot wheel always means the brakes are working better
- B.New heat, pulling, odor, or weak braking can reveal a dragging, leaking, or failing brake that was not obvious at departure
- C.En route checks are only for cargo and lights, never brakes
- D.Brake problems only develop during the pre-trip inspection
Correct answer
B. New heat, pulling, odor, or weak braking can reveal a dragging, leaking, or failing brake that was not obvious at departure
Why
Heat and vibration on the road expose defects such as a dragging brake, a failing bearing, or a chamber that is not releasing. Catching the change at a stop can prevent a wheel fire or a complete brake failure.
Manual topic: Air Brakes - Brake Inspection · From the Air Brakes practice bank (AB-145).