Q
When a brake pedal is pressed and the S-cam is turned, the S-cam:
Air Brakeseasy
ALoosens the brake shoes
BPresses the brake shoes against the inside of the brake drum
CStops the vehicle immediately
Detailed Explanation
The correct answer is "Presses the brake shoes against the inside of the brake drum". This is based on federal CDL regulations and safety standards.
Correct Answer: Presses the brake shoes against the inside of the brake drum
Ready to practice for real?
Take our free, full-length Air Brakes practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
107. What is emergency control braking?
air-brakesmedium
98. The most important thing to do when a low air pressure warning comes on is:
air-brakesmedium
104. How should you check that your service brakes are working properly?
air-brakesmedium
100. Your bus or truck has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
air-brakesmedium
A low air pressure warning signal:
air-brakesmedium