2025 North Carolina Cdl Air Brakes - Test 1
The following questions are from real North Carolina CDL practice tests. After selecting the answer, you can see the explanation. After confirming, click "Next" to jump to the next question.
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1. 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.
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Key Data
Number of Tests: 18
Number of Question: 25
Passing Score: 20
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