Question Which type of vehicle is most prone to the “crack-the-whip” effect? Answers A five-axle tractor semi-trailer A three-axle tractor semi-trailer A bobtail tractor A triple trailer Explanation Triple combination trailers are most vulnerable to the "crack-the-whip" effect. This questions appears in the following tests: Georgia Combination Indiana Combination Minnesota Air Brakes Nebraska Combination Nevada Combination North Carolina Combination South Carolina Combination South Dakota Combination Texas Combination