31. Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
Bring the vehicle to a safe stop and safely park. Continue only after the system is fixed.
32. The brake pedal in an air brake system:
Control the air pressure applied to put on the brakes.
33. The S-cam:
Forces the brake shoes against the inside of the brake drum.
34. Under normal conditions in order to engage the parking brakes, driver:
Let the air out of air brake system.
35. All air brake equipped vehicles have:
A supply pressure gauge.