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. This questions appears in the following tests: Alabama Double Florida Tank Florida Combination Georgia Combination Kansas Tank Kansas Combination Minnesota Air Brakes New York Double New York Double North Carolina Combination Pennsylvania Double South Carolina Combination Wisconsin Combination Wyoming Tank