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Some older air systems use an alcohol evaporator. What problem is it meant to prevent?
- A.Water freezing inside air lines and valves during cold weather
- B.Engine fuel gelling in the tank
- C.Brake drums cracking from heat
- D.Battery acid boiling in summer heat
Correct answer
A. Water freezing inside air lines and valves during cold weather
Why
A small amount of alcohol vapor lowers the freezing point of moisture trapped in the system. It does not raise pressure or improve braking force, and the container must be checked and refilled in winter operation.
Manual topic: Air Brakes - Alcohol Evaporator · From the General Knowledge practice bank (GK-105).