Revision question · Vehicle condition

You've stopped on a firm, level surface. What's the first thing you must do before you uncouple the trailer?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

Lower the trailer legs to the ground

Apply the parking brake

Release the brake air lines

Uncouple the electrical lines

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Apply the parking brakeThis was the right answer

Before leaving the cab, it's very important to secure the vehicle by applying the parking brake. After leaving the cab, apply the trailer parking brake.

Reviewed reading for this question

Inspect the fifth wheel before the controlled tug testReviewed guidance summary · The fifth wheel connects tractor and trailer; the dog clip secures the release mechanism. The corrected final-stage wording retains the full walkaround after coupling.

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