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2026 Iowa DMV Knowledge Test Class B Test 2
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Question Number 39
39. When performing a pre-trip inspection and looking into the fifth wheel gap, you should:
Make sure the locking jaws are open.
Make sure the locking jaws are fully closed around the kingpin.
Make sure the locking jaws are loose.
✔ Correct Answer:
Make sure the locking jaws are fully closed around the kingpin.
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