Home › CDL Practice Tests › Combination Vehicles Questions › Question 124
Why should the pivot of a fifth wheel be checked for free movement?
- A.A seized pivot makes the truck faster
- B.Pivot movement is never needed after coupling
- C.It only matters for washing the truck
- D.The plate must be able to tilt to match the apron angle during coupling and to flex over uneven ground
Correct answer
D. The plate must be able to tilt to match the apron angle during coupling and to flex over uneven ground
Why
A plate that cannot tilt cannot meet the apron flat, leading to poor contact and difficult coupling. In travel, the pivot absorbs differences in angle between tractor and trailer on slopes and docks.
Manual topic: Combination Vehicles - Coupling Equipment · From the Combination Vehicles practice bank (CV-124).