Question:
An alcohol evaporator is a part of some air brake systems. If you don’t keep the proper level of alcohol, what may happen?
A
Ice may form in the air brake valves and cause brake failure.
explanation
Some air brake systems have an alcohol evaporator to put alcohol into the air system. This helps to reduce the risk of ice in air brake valves and other parts during cold weather. Ice inside the system can make the brakes stop working. [California Commercial Driver Handbook]
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