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EXAM REVIEW
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Ihuman Case Study
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2026 Iowa DMV Bus Endorsement Test 1
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Question Number 15
15. 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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