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2026 Free Arkansas DMV Class A CDL Air Brakes Test 1
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Question Number 6
6. When a brake pedal is pressed and the S-cam is turned, the S-cam:
Presses the brake shoes against the inside of the brake drum.
Tightens the brake drum onto the axle.
Presses the brake lining against the wheel.
Releases air from the air tanks.
✔ Correct Answer:
Presses the brake shoes against the inside of the brake drum.
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