Repeatedly partially increasing and pressing the brake pedal may result in:
Answer: C
A loss of brake air pressure.
In an air brake system, the air is vented to the atmosphere when the pedal is released and the compressor is relied on to maintain the air pressure. Excessive pressing and releasing the pedal may cause more air to be released than the compressor can quickly replace.
All choices
- ANo change of brake air pressure.
- BA buildup of brake air pressure.
- CA loss of brake air pressure.
Why the other answers are wrong
A. No change of brake air pressure.
Choice A is wrong because repeatedly pressing the brake pedal causes air to be vented, reducing pressure.
B. A buildup of brake air pressure.
Choice B is wrong because brake air pressure decreases, not builds up, with repeated partial brake applications.
CDL Air Brakes Test Info
Questions on Exam
25
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
The Air Brakes test content is federally standardized, so this question applies in every state. Age limits, fees, and testing procedures do vary — check your state's CDL requirements.
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More CDL Air Brakes Practice Questions
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