Question What happens when the wheels of a trailer lock up? Answers The trailer will usually continue to move in a straight line. The trailer will disengage. The trailer will likely swing around. The trailer will stop. Explanation A trailer tends to swing around, potentially resulting in a trailer jackknife, if its wheels lock up. Take a FREE Practice Test Now This questions appears in the following tests: Pennsylvania Tank , Connecticut Combination , Florida Combination , Georgia Combination , Indiana Combination , Kansas Combination , Massachusetts Combination , Minnesota Combination , Nebraska Combination ,