Question An improperly placarded vehicle: Answers May never be moved. May only be moved in an emergency. May be driven if the cargo is not radioactive. Explanation A vehicle that lacks the proper placards for any hazardous materials on board may not be driven, except as necessary to protect life and property in an emergency. Take a FREE Practice Test Now This questions appears in the following tests: Arizona HazMat , Idaho HazMat , Iowa HazMat , Maryland HazMat , New Mexico HazMat , South Dakota HazMat ,