Question What color is the low air pressure warning light? Answers Green Orange Red Purple Explanation A low air pressure warning signal is required in vehicles with air brakes. The warning light is usually red and may be accompanied by a buzzer. Take a FREE Practice Test Now This questions appears in the following tests: Delaware Knowledge Test Class A , Texas Knowledge Test Class A , Arkansas Knowledge Test Class B , Indiana Knowledge Test Class B , Maryland Knowledge Test Class B , Montana Air Brakes , Nebraska Air Brakes , Nevada Air Brakes ,