Air brake system components, inspection steps, and safety concepts tested on the CDL air brakes endorsement exam.
29 cards · basic cards · AI-written, checked twice. Edit anything.
- What component compresses ambient air for the brake system?
- The air compressor
- What does the governor do in an air brake system?
- Controls the air pressure inside the system, turns compressor on and off
- What is the purpose of the air dryer?
- Removes moisture and water from compressed air
- What are air storage tanks used for?
- Store compressed air to supply the brake system when needed
- What does a relay valve do?
- Speeds up brake application by supplying air directly from the tank
- What is the function of a brake chamber?
- Converts air pressure into mechanical force to apply the brakes
- What does the tractor protection valve prevent?
- Loss of tractor air pressure if the trailer develops a leak
- What is the trailer air supply valve responsible for?
- Controlling the flow of air to the trailer brake system
- What is the typical normal operating air pressure range for air brakes?
- 100 to 135 PSI
- What does the slack adjuster do?
- Automatically adjusts brake rod length to maintain proper brake clearance
- What are spring brakes used for?
- Emergency and parking brakes that apply when air pressure is lost
- What causes air brake fade?
- Excessive heat from continuous hard braking reduces braking effectiveness
- What does the low-pressure warning signal alert the driver to?
- Air pressure has dropped below safe operating level
- What is the primary source of air for the brake system?
- The air compressor, powered by the engine
- What is the purpose of a check valve in the air brake system?
- Prevents air from flowing backward from the storage tanks