Practice question

What must happen before the tractor fully pulls away from a trailer?

Disconnect lines before securing the trailer
Secure the trailer, lower landing gear on firm ground, disconnect lines, release the fifth wheel, and pull out slowly
Pull away before lowering the landing gear
Leave the trailer unchocked on a grade

Answer: B — Secure the trailer, lower landing gear on firm ground, disconnect lines, release the fifth wheel, and pull out slowly

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