When driving with covered cargo, a cover that flaps: Question When driving with covered cargo, a cover that flaps: Answers Is acceptable. Allows air to keep the cargo cool. Can tear loose. Can attract birds. Explanation Cargo covers should not flap in the wind. They could tear loose, not only uncovering the cargo but also blocking the views of drivers. This questions appears in the following tests: Kansas Double New Hampshire Class A Knowledge Test North Dakota Class A Knowledge Test Wisconsin Class A Knowledge Test