Alcohol evaporators are: Question Alcohol evaporators are: Answers Illegal. Used to introduce alcohol into air brake systems. Only allowed in the northern parts of the state. Explanation Some air brake systems have alcohol evaporators, which introduce alcohol into the braking system to help prevent the formation of ice. This questions appears in the following tests: Arizona Class B Knowledge Test Arizona Class B Knowledge Test Arizona Air Brakes Iowa Class B Knowledge Test Louisiana Class B Knowledge Test Maryland Class A Knowledge Test New Mexico Class A Knowledge Test Tennessee Passenger Vermont Class A Knowledge Test Vermont Class B Knowledge Test Vermont Air Brakes
