Question ABS brakes: Answers Help you avoid wheel lockup. Lock up your vehicle's wheels. Prevent your vehicle from accelerating when going uphill. Explanation The purpose of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up when the driver brakes hard on a slippery surface. Take a FREE Practice Test Now This questions appears in the following tests: Minnesota Knowledge Test Class B , Rhode Island Knowledge Test Class B , California Double , Hawaii Air Brakes , Louisiana Air Brakes , Maine Air Brakes , Michigan Air Brakes , Oklahoma Air Brakes , Oregon Air Brakes , Utah Air Brakes ,