Home › CDL Practice Tests › Air Brakes Questions › Question 12
Which component keeps dirt and moisture from doing the most harm by removing water and oil from compressed air before it reaches the tanks?
- A.The slack adjuster
- B.The treadle valve cover
- C.The gladhand seal
- D.The air dryer
Correct answer
D. The air dryer
Why
The air dryer uses a desiccant cartridge to strip moisture and contaminants from compressor output. That protects valves and chambers from corrosion, freezing, and sluggish operation in cold weather.
Manual topic: Air Brakes - Air Brake System Components · From the Air Brakes practice bank (AB-012).