ABS brakes: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. 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. This questions appears in the following tests: Alabama Air Brakes Alaska Class B Knowledge Test Delaware Air Brakes Delaware Air Brakes Hawaii Class B Knowledge Test Hawaii Air Brakes Idaho Class A Knowledge Test Kentucky Class B Knowledge Test Maine Class B Knowledge Test Maine Air Brakes Missouri Class B Knowledge Test Montana Class A Knowledge Test New Hampshire Air Brakes Oklahoma Class A Knowledge Test Oregon Class A Knowledge Test Rhode Island Class A Knowledge Test Rhode Island Double Rhode Island Air Brakes Vermont Class B Knowledge Test Virginia Air Brakes Washington Class B Knowledge Test Washington Air Brakes