Which hazard class is indicated by the placard with the trefoil symbol?

Which hazard class is indicated by the placard with the trefoil symbol?

• A. Flammable
• B. Toxic
• C. Corrosive
• D. Radioactives

Answer: (D)

Placing placards is about quickly signaling the type of hazard you’re dealing with. The trefoil symbol is the universal sign for radiation. When you see that symbol, it means radioactive or radiological materials are involved, which falls under Class 7 for hazardous materials. So the best interpretation of this placard is a radiological hazard, i.e., Radioactives. The other symbols point to different hazards: a flame indicates flammable materials, a skull-and-crossbones signals toxic substances, and a symbol for corrosive shows materials that can burn skin or corrode metals.

Placing placards is about quickly signaling the type of hazard you’re dealing with. The trefoil symbol is the universal sign for radiation. When you see that symbol, it means radioactive or radiological materials are involved, which falls under Class 7 for hazardous materials.

So the best interpretation of this placard is a radiological hazard, i.e., Radioactives. The other symbols point to different hazards: a flame indicates flammable materials, a skull-and-crossbones signals toxic substances, and a symbol for corrosive shows materials that can burn skin or corrode metals.