Which statement is true regarding DOT hazard classification?

The assertion that each material can have multiple hazards is true regarding DOT hazard classification. In the context of hazardous materials, the Department of Transportation (DOT) recognizes that many substances can possess more than one type of hazard. For example, a chemical might be flammable, toxic, and reactive at the same time. This multi-hazard classification allows for a more comprehensive understanding of the risks associated with transporting and handling materials, ensuring appropriate safety measures and communication are in place.

The other statements do not align with the principles of DOT hazard classification. Primary hazards alone do not account for the full range of risks a material may present, as acknowledging secondary hazards is essential for safety. Furthermore, materials are not classified solely based on a single hazard, as many possess multiple classifications due to their diverse properties. Lastly, the idea that materials cannot belong to more than one class is inaccurate; many hazardous materials are indeed classified under multiple categories to reflect their various hazard characteristics accurately.