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Q

1. You are coupling a semi trailer to your tractor but have not yet backed under. The trailer is at the right height when:

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AIt will be raised slightly when the tractor is backed under it.
BThe kingpin is about 1 1/4 inches above the fifth wheel.
CThe end of the kingpin is even with the top of the fifth wheel.

Detailed Explanation

The correct answer is "It will be raised slightly when the tractor is backed under it.". This is based on federal CDL regulations and safety standards.

Correct Answer: It will be raised slightly when the tractor is backed under it.

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