When transporting hazardous materials, placards: Question When transporting hazardous materials, placards: Answers Should be lit up. Should be used on all four sides of the vehicle. Should be used only by Class A licensed drivers. Explanation When required, hazardous materials placards must be placed on all four sides of a vehicle transporting hazardous materials. This questions appears in the following tests: Alaska HazMat Arizona HazMat Arizona HazMat Maryland Tank Missouri HazMat Nebraska HazMat New Hampshire HazMat Rhode Island HazMat South Carolina HazMat South Dakota HazMat Virginia HazMat Wyoming HazMat
