Why drain water from compressed air tanks?
Answer: B
Water can freeze in cold weather and cause brake failure.
Compressing air often causes condensation to build up in the system. Failure to remove the air can cause the water to freeze in the system and result in brake failure and premature equipment wear.
All choices
- AWater cools the compressor too much.
- BWater can freeze in cold weather and cause brake failure.
- CWater low boiling point reduces braking power.
Why the other answers are wrong
A. Water cools the compressor too much.
Choice A is wrong because water in the system does not cool the compressor excessively.
C. Water low boiling point reduces braking power.
Choice C is wrong because water's boiling point does not affect braking power; freezing water causes brake failure.
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
- The air compressor governor controls:
- To check the free play of manual slack adjusters of S-cam brakes, you should park on:
- A slack adjuster free play needs to be adjusted if it is more than about ____ when you pull hard on it.
- Stab braking:
- Which procedure is used in controlled braking?