California CDL Air Brakes Practice Test 2

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.

Presses the brake shoes against the inside of the brake drum.

Access more questions from this quiz

Continue to California CDL Air Brakes Practice Test 2 for more practice questions and the full quiz experience.