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EXAM REVIEW
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Ihuman Case Study
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2026 Delaware DMV Combination Class A Test 2
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Question Number 3
3. A shut-off valve:
Is located on the front of a trailer.
Is located on the instrument panel.
Prevents air from escaping an air brake system.
Should always be open.
✔ Correct Answer:
Prevents air from escaping an air brake system.
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