What four hazards does NFPA 704 placard show and what are the ratings?

What four hazards does NFPA 704 placard show and what are the ratings?

• A. Health, Fire, Reactivity, Special; 1-4 with 4 worst
• B. Temperature, Pressure, Volume, Humidity; ratings 1-5
• C. Toxicity, Corrosivity, Flammability, Reactivity; ratings 0-2
• D. Chemical reactivity: 0-3

Answer: (A)

NFPA 704 placards convey hazards using a diamond with four sections. The four hazards shown are Health, Fire, Reactivity, and Special. The first three sections carry a numeric rating from 0 to 4, where 0 means no hazard and 4 means the highest hazard. The white “Special” section uses letters or symbols (such as OX for oxidizers or W for water-reactive) rather than a number to indicate special conditions or requirements. So the best choice lists those four hazard areas and notes a numeric rating system for the colored sections, with the understanding that the white section provides special information rather than a numeric score.

NFPA 704 placards convey hazards using a diamond with four sections. The four hazards shown are Health, Fire, Reactivity, and Special. The first three sections carry a numeric rating from 0 to 4, where 0 means no hazard and 4 means the highest hazard. The white “Special” section uses letters or symbols (such as OX for oxidizers or W for water-reactive) rather than a number to indicate special conditions or requirements. So the best choice lists those four hazard areas and notes a numeric rating system for the colored sections, with the understanding that the white section provides special information rather than a numeric score.