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2026 District Of Columbia DMV Air Brakes Class A Test 2
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Question Number 21
21. Some air brake systems use alcohol:
To reduce the risk of ice forming in air brake valves.
To make the compressor run more efficiently.
To lubricate parts of the braking system.
To reduce the risk of rust forming on air brake valves.
✔ Correct Answer:
To reduce the risk of ice forming in air brake valves.
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