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2026 Delaware DMV Knowledge Test Class B Test 1
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Question Number 15
15. Why do you need to drain air tanks regularly?
Because the air gets old and needs to be replaced
Because compressed air contains some water which must be drained from the tanks
To allow for a change in air pressure
To remove bad air from the tanks
✔ Correct Answer:
Because compressed air contains some water which must be drained from the tanks
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