What should you check about a sliding fifth wheel before coupling?

• A.It should be left unlocked to absorb shocks
• B.Only one pin needs to engage
• C.Its locking pins should be fully engaged so the fifth wheel cannot slide during travel
• D.Sliding position never affects handling

Why

An unlocked sliding fifth wheel can slam forward or back under braking or acceleration, shifting weight and possibly damaging the stops. Both pins must be seated before you couple and drive.

Manual topic: Combination Vehicles - Coupling · From the Combination Vehicles practice bank (CV-023).

Practice this subject as a full test

More Fifth Wheel & Coupling Steps questions

• Before backing under a trailer, what should you first check about the trailer's height?
• What is the correct way to approach a trailer when starting to couple?
• Just before the fifth wheel contacts the trailer apron, what should you do?
• Why should you back very slowly for the last part of coupling?
• When you first back under and hear the fifth wheel lock, what is the next safety check?