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Why does alcohol in the system not excuse skipping tank draining?
- A.Alcohol dissolves the steel tanks if left overnight
- B.Alcohol helps prevent freezing of moisture in lines and valves, but water and oil still collect in the tanks and must be removed
- C.Alcohol removes all oil from the compressor discharge
- D.Draining after using alcohol is dangerous in every case
Correct answer
B. Alcohol helps prevent freezing of moisture in lines and valves, but water and oil still collect in the tanks and must be removed
Why
Evaporators treat the air stream against ice, while drains physically remove the liquid that has already condensed. The two practices work together in winter, and neither replaces the other.
Manual topic: Air Brakes - Alcohol Evaporators · From the Air Brakes practice bank (AB-229).