Question When driving a truck requiring a CDL: Answers You do not need to wear a seat belt. You are required to wear a seat belt, but only if transporting more than 500 pounds of cargo. You must always wear a seat belt. Explanation You must be properly restrained by a safety belt at all times when driving a commercial motor vehicle. Take a FREE Practice Test Now This questions appears in the following tests: Missouri Knowledge Test Class A , Ohio Knowledge Test Class A , Virginia Knowledge Test Class A ,