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8. When you press the brake pedal in an air brake system, you are operating the:
9. Foundation brakes are used at each wheel. The most common type is the:
10. In an S-cam brake, what component forces the brake shoes apart and against the drum?
11. How do wedge brakes differ from S-cam brakes?
12. What should the air pressure gauge reading be in a typical air brake system during normal operation?
13. The low air pressure warning signal must activate before air pressure drops below:
14. What typically happens when the low air pressure warning activates?
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