Most heavy-duty vehicles use ____ air brake systems. Question Most heavy-duty vehicles use ____ air brake systems. Answers Single Dual Triple Quad Explanation The majority of heavy-duty vehicles are equipped with dual air brake systems. This questions appears in the following tests: Connecticut Class A Knowledge Test District Of Columbia Class B Knowledge Test District Of Columbia Air Brakes Florida Double Georgia Class A Knowledge Test Kansas Double Montana Class A Knowledge Test Nebraska Class A Knowledge Test New York Tank North Dakota Air Brakes Oregon Air Brakes Pennsylvania Class B Knowledge Test Pennsylvania Air Brakes South Dakota Class A Knowledge Test South Dakota Class B Knowledge Test South Dakota Air Brakes Texas Class B Knowledge Test Texas Air Brakes Texas Air Brakes Utah Air Brakes Wisconsin Class A Knowledge Test Wisconsin Double Wisconsin Air Brakes
