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2026 Illinois DMV Air Brakes Class A Test 1
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Question Number 21
21. A dual air brake system:
Has a single air brake system, but uses two sets of controls.
Has one air brake system for each side of the truck.
Has two brakes for each wheel.
Has two separate air brake systems, but uses a single set of controls.
✔ Correct Answer:
Has two separate air brake systems, but uses a single set of controls.
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