Question 55 of 140

Why should you raise the landing gear fully before driving away after coupling a trailer?

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Leaving it partially down can let it drag, catch on the road, or be torn off while driving
Landing gear position has no effect at all once the fifth wheel is fully locked around the kingpin
It only affects the trailer's fuel economy
It is only necessary if the trailer will sit for more than a day

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Correct answer to question 55 (Combination Vehicles): Leaving it partially down can let it drag, catch on the road, or be torn off while driving

Why

Landing gear left even partway down can strike the road, especially over dips or railroad crossings, and can be bent or torn off, so it needs to be fully retracted before the vehicle moves.

Updated: November 2026

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Why should you raise the landing gear fully before driving away after coupling a trailer?

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