Using a helper when backing is: Question Using a helper when backing is: Answers Encouraged. Discouraged. Illegal in most states. Usually a cause of problems. Explanation When backing up, it is always a good idea for a driver to use a helper who can watch the vehicle's blind spots. The helper should stand near the back of the vehicle in a location where they are visible to the driver. This questions appears in the following tests: Minnesota Tank North Dakota Double South Carolina Class A Knowledge Test