Question An alcohol evaporator is especially important: Answers In cold weather. In hot weather. In dry weather. Explanation Some air brake systems contain an alcohol evaporator. This evaporator introduces alcohol into the system to help prevent ice from forming in cold weather. Take a FREE Practice Test Now This questions appears in the following tests: Arizona Knowledge Test Class A , New Mexico Knowledge Test Class B , South Carolina Double , Idaho Air Brakes , Iowa Air Brakes , Kentucky Air Brakes , Louisiana Air Brakes , Vermont Air Brakes , Virginia Air Brakes ,