Hazardous Cargo Class 4 corresponds to which hazard?

Hazardous Cargo Class 4 corresponds to which hazard?

• A. Corrosive
• B. Liquids
• C. Oxidizers
• D. Solids

Answer: (D)

Hazard Class numbers map to broad danger types. Class 4 is assigned to hazardous solids—solids that are flammable or have related risks, including substances that are self-heating or dangerous when wet. So Class 4 corresponds to solids. The other options point to hazards from different classes: corrosives are Class 8, liquids fall under Class 3 (flammable liquids) or other classes depending on the liquid, and oxidizers are Class 5.1.

Hazard Class numbers map to broad danger types. Class 4 is assigned to hazardous solids—solids that are flammable or have related risks, including substances that are self-heating or dangerous when wet. So Class 4 corresponds to solids. The other options point to hazards from different classes: corrosives are Class 8, liquids fall under Class 3 (flammable liquids) or other classes depending on the liquid, and oxidizers are Class 5.1.