CDL · Air brakes
If the air compressor springs a leak, which valve keeps the stored air from escaping?
Correct answer: One-way check valve.
Answer options
- ATractor protection valve
- BSafety relief valve
- COne-way check valve Correct
Why
A one-way check valve lets air pass from the compressor into the tanks but not back out, so a compressor leak cannot drain the stored air. The tractor protection valve protects the tractor's air if the trailer breaks away or leaks badly, and the safety relief valve vents air when pressure gets too high.
About this question
Topic: Air brakes License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
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This question is part of How Air Brakes Work (18 questions). Take the full set and check your score.
Practice How Air Brakes WorkMore questions from How Air Brakes Work
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