Q
67. You are uncoupling a trailer. After you shut off the trailer air supply and lock the trailer brakes, you should:
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Aa. Begin to lower the trailer landing gear.
Bb. Immediately put on your tractor parking brakes.
Cc. Back up gently to ease pressure on the fifth wheel locking jaws.
Detailed Explanation
The correct answer is "c. Back up gently to ease pressure on the fifth wheel locking jaws.". This is based on federal CDL regulations and safety standards.
Correct Answer: c. Back up gently to ease pressure on the fifth wheel locking jaws.
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