Question Backing with a trailer is dangerous because: Answers It is difficult to see behind the vehicle. Most trucks do not have the ability to move in reverse. Cargo may fall out of the trailer. There may be extra weight in the front of the trailer. Explanation Backing up is always dangerous because it is impossible to see everything behind your vehicle. If you must drive in reverse, use a helper, if possible. Take a FREE Practice Test Now This questions appears in the following tests: Colorado Knowledge Test Class A , New Hampshire Knowledge Test Class A , Tennessee Knowledge Test Class A , West Virginia Knowledge Test Class A ,