Question 7 of 20
Score: 0/0When uncoupling a trailer, after shutting off the trailer air supply and setting the trailer brakes, what should you do next?
ExplanationAfter setting the trailer brakes, gently backing up reduces pressure on the fifth wheel locking jaws, making uncoupling safer and easier.
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Did you know? Know which line is supply and which is service, and what happens when the emergency line loses air.
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