What is a bobtail tractor? Question What is a bobtail tractor? Answers A tractor without a semi-trailer A tractor with two semi-trailers A tractor that travels faster than the speed limit Explanation Tractors without semi-trailers are referred to as "bobtail tractors." Bobtail tractors are difficult to operate and drivers must exercise caution. This questions appears in the following tests: Alaska Combination Hawaii Combination Hawaii Combination Iowa Combination Maine Combination Michigan Combination Mississippi HazMat Montana Tank Montana Combination New Mexico Combination Ohio Combination Ohio Combination Oklahoma Combination Oregon Combination Rhode Island Tank South Carolina Tank Washington Combination Washington Combination Wisconsin Combination Wyoming Combination