Which statement best describes the nine hazard classes used in hazmat classification?

Which statement best describes the nine hazard classes used in hazmat classification?

• A. Flammable, toxic, corrosive, reactive, and five other classes
• B. Only flammable liquids
• C. Textiles and plastics categories only
• D. Weather and wind speed categories

Answer: (A)

In hazmat classification, shipments are grouped into nine hazard classes to standardize how they’re handled, labeled, and responded to. These classes cover explosives; gases; flammable liquids; flammable solids; oxidizers and organic peroxides; toxic substances (including infectious substances); radioactive materials; corrosives; and a category for miscellaneous dangerous goods. The statement is best because it acknowledges there are nine distinct classes and mentions representative types—flammable, toxic, corrosive, reactive—plus that there are five additional classes. The other options mischaracterize the system by focusing on a single category, or on unrelated topics like textiles, plastics, or weather, which don’t describe hazmat classification.