During a pre-trip inspection of the coupling, you push forward on the trailer and the fifth wheel does not release. What does this indicate?

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Multiple choice — select the best answer

AThe glad hands are not connected
BThe landing gear needs to be lowered further
CThe coupling is properly locked and secure
DThe kingpin is worn and must be replaced before driving

✓ Correct answer: C. The coupling is properly locked and secure Pushing forward on the trailer while the tractor is in low gear and not releasing confirms the fifth wheel is properly locked onto the kingpin, which is a required part of the coupling inspection.

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During a pre-trip inspection of the coupling, you push forward on the trailer and the fifth wheel does not release. What does this indicate?

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