Question When leaving your vehicle: Answers The air brakes should be applied. The parking brake should be applied. Brakes should not be applied if the vehicle is left out of gear. Explanation Parking brakes should be used whenever you park. If necessary, chock your wheels. This questions appears in the following tests: Alaska Class A Knowledge Test California Class B Knowledge Test California Passenger Connecticut Class B Knowledge Test Idaho Class B Knowledge Test Louisiana Class A Knowledge Test Michigan Passenger Mississippi Class A Knowledge Test Missouri Class B Knowledge Test Nebraska Passenger Ohio Tank Rhode Island Class B Knowledge Test Rhode Island Double Rhode Island Tank Virginia Double Washington Passenger Wisconsin Class A Knowledge Test Wisconsin Passenger