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