Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. 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. Take a FREE Practice Test Now This questions appears in the following tests: Mississippi Knowledge Test Class A , Missouri Knowledge Test Class A , Virginia Knowledge Test Class A , Louisiana Passenger ,