Which of the following is listed as a type of hazmat?

• A. Nonhazardous
• B. Flammable
• C. Biological hazards
• D. Radioactive materials

Answer: (B)

Hazmat materials are substances that pose a risk during handling, storage, or transport due to their specific hazardous properties. A primary category you’ll see called out is flammable materials, because their vapors can ignite and cause fires easily if there’s a heat source, spark, or static discharge. That ignition risk makes them a standard hazmat type that requires special labeling, packaging, and handling procedures.

Nonhazardous isn’t a hazmat type because it denotes materials that don’t present a hazardous risk, so it wouldn’t be classified as hazmat. Biological hazards and radioactive materials are indeed hazardous and would require strict controls, but in the context of this particular list, the option that clearly represents a hazmat type commonly singled out for transport and handling safety is flammable. Understanding that flammable means a material can catch fire readily helps you recognize why it’s identified as a hazmat category.