Practice question

During uncoupling of a fifth-wheel tractor-trailer, how should the landing gear be lowered before pulling away?

Until it raises the trailer several centimetres off the fifth wheel
Until it is just above the ground or contacts the ground without raising the trailer from the fifth wheel
Only halfway down, so the trailer drops after separation
Not at all if the trailer is empty

Answer: B — Until it is just above the ground or contacts the ground without raising the trailer from the fifth wheel

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