Question When experiencing cold weather, be sure to check your vehicle's alcohol evaporator: Answers Every three hours. Every day. Every other week. Explanation An alcohol evaporator can help prevent ice from building up in an air brake system. In cold weather, the evaporator should be checked and refilled every day. Take a FREE Practice Test Now This questions appears in the following tests: Alaska Knowledge Test Class A , Arizona Knowledge Test Class B , New Mexico Knowledge Test Class B , Hawaii Air Brakes , Louisiana Air Brakes , South Carolina Air Brakes ,