When refueling a vehicle transporting hazardous materials: Before you start the test, please answer the question below regarding your insurance status. Without insurance you will not be able to drive in Ohio Do you currently have car insurance? Yes I have insurance. Great, you're all set! Click here if you still want to compare rates. No, I need insurance and I want to compare options. Question When refueling a vehicle transporting hazardous materials: Answers The engine should be left on. The engine should be turned off. The gas nozzle may be left unattended. Someone other than the driver should do it. Explanation Always turn the engine off before refueling a vehicle carrying hazardous materials. Someone must always be at the nozzle controlling the fuel flow. This questions appears in the following tests: Arkansas HazMat Maryland Tank Massachusetts HazMat Nebraska Tank South Carolina HazMat South Carolina Tank South Dakota HazMat South Dakota HazMat Tennessee HazMat Wyoming HazMat