Question A Class 7 hazardous material is: Answers Explosive. Flammable. Radioactive. Corrosive. Explanation Radioactive materials are categorized as Class 7 hazardous materials. Take a FREE Practice Test Now This questions appears in the following tests: Alabama HazMat , Florida HazMat , Indiana HazMat , Massachusetts HazMat , North Carolina HazMat , South Carolina HazMat , Texas HazMat , Wisconsin HazMat , Wyoming HazMat ,