A Class 1 hazardous material is: Question A Class 1 hazardous material is: Answers An explosive. Radioactive. Corrosive. Explanation The first hazardous materials class includes explosives such as ammunition, dynamite, and fireworks. This questions appears in the following tests: Alabama Class A Knowledge Test Arizona Double California Tank Connecticut Class A Knowledge Test Florida Passenger Hawaii Class A Knowledge Test Hawaii Class B Knowledge Test Hawaii Class B Knowledge Test Iowa Passenger Missouri Passenger Montana Double Nevada Class A Knowledge Test New Mexico Class B Knowledge Test New Mexico Tank Ohio Tank Ohio Passenger Oklahoma Class B Knowledge Test Vermont Class B Knowledge Test Washington Class A Knowledge Test Wisconsin Class A Knowledge Test