Using a helper when backing up a large vehicle is: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Using a helper when backing up a large vehicle is: Answers Encouraged. Discouraged. Illegal. Explanation Backing a CMV is always dangerous due to limited visibility, so using a helper to monitor your blind spots is encouraged whenever possible. This questions appears in the following tests: Alaska Class A Knowledge Test Iowa Class B Knowledge Test New Hampshire Passenger Oklahoma Double Tennessee Class B Knowledge Test