Question On flat surfaces, wheel chocks: Answers Can be used to prevent a parked vehicle from moving. Make it easier for a parked vehicle to roll. Should only be used on the front driver's side tire. Explanation In situations where a driver cannot use a parking brake, wheel chocks can be used to hold a parked vehicle in place on a level surface. Take a FREE Practice Test Now This questions appears in the following tests: Connecticut Knowledge Test Class A , Tennessee Knowledge Test Class A , Washington Knowledge Test Class A , Wisconsin Knowledge Test Class A , Hawaii Knowledge Test Class B , New Mexico Knowledge Test Class B , Alabama Air Brakes , Arizona Air Brakes , Rhode Island Air Brakes , South Carolina Air Brakes , Wyoming Air Brakes ,