Which hazard class is indicated by the placard illustration for flammable liquids?

• A. Poison gases
• B. Flammable liquid/combustible
• C. Corrosives
• D. Radioactives

Answer: (B)

The symbol shown is a flame, which is the marker for flammable liquids. That places the hazard in Class 3, the flammable liquids/combustible category. This is why it’s the best choice: the flame pictogram is specifically used to indicate materials that can ignite easily, like solvents, fuels, and other flammable liquids, so responders know to avoid ignition sources and take appropriate fire-safety precautions. Other hazards have different symbols—poisonous gases would use a toxic/gas symbol, corrosives show a corrosion symbol, and radioactive materials carry the trefoil—so those don’t match the flame icon.