Home › CDL Practice Tests › Combination Vehicles Questions › Question 177
During an en-route stop, which combination-specific items deserve a quick recheck?
- A.Only the fuel gauge and engine temperature
- B.Nothing combination-related can change once you are rolling
- C.The radio and the seat adjustment
- D.Coupling security, air and electrical line condition, trailer tires and hubs for heat, and cargo/door security
Correct answer
D. Coupling security, air and electrical line condition, trailer tires and hubs for heat, and cargo/door security
Why
Heat, vibration, and road shock work on couplings, lines, and tires as the miles add up. A walk-around that includes the connection points catches a chafing hose or hot hub before it becomes a roadside failure.
Manual topic: Combination Vehicles - Trailer Inspection · From the Combination Vehicles practice bank (CV-177).