South Dakota Commercial Driver's License (CDL) Knowledge Tests

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A driver is preparing for their pre-trip inspection. If the vehicle is equipped with an alcohol evaporator, what is its primary function?

To clean the air going into the tanks To reduce the risk of ice forming in air brake valves during cold weather To inject alcohol into the fuel system for better combustion To cool the air compressed by the engine

Correct Answer:

To reduce the risk of ice forming in air brake valves during cold weather

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