A truck tractor built after March 1, 1997 must be equipped with: Question A truck tractor built after March 1, 1997 must be equipped with: Answers An Anti-Lock Braking System (ABS). A flag. Hydraulic brakes. Explanation Truck tractors with air brakes built on or after March 1, 1997 are required to be equipped with Anti-Lock Braking Systems (ABS). This questions appears in the following tests: Arkansas Tank California Class B Knowledge Test California Class B Knowledge Test Hawaii Class B Knowledge Test Iowa Tank Maine Passenger Michigan Class A Knowledge Test Missouri Double Washington Class B Knowledge Test Washington Class B Knowledge Test Wisconsin Double Wisconsin Tank
