Question What does ABS do? Answers Prevent wheel lockup Prevent the air compressor from overheating Prevent the front brakes from being used on ice Prevent the brakes from being used if downshifting would be more effective Explanation The purpose of an Anti-Lock Braking System (ABS) is to prevent wheels from locking up during hard applications of the brakes, especially on slippery surfaces. Take a FREE Practice Test Now This questions appears in the following tests: Delaware Knowledge Test Class A , Montana Knowledge Test Class A , Connecticut Knowledge Test Class B , Florida Air Brakes , Georgia Air Brakes , South Carolina Air Brakes , Texas Air Brakes , West Virginia Air Brakes ,