What four hazards does the NFPA 704 placard indicate and what is the rating scale?

What four hazards does the NFPA 704 placard indicate and what is the rating scale?

• A. Health, Fire, Reactivity and Special with ratings 1-4.
• B. Protection, Containment, Pressure and Stability with ratings 0-5.
• C. Toxicity, Corrosion, Flammability and Reactivity with ratings A-D.
• D. Flash Point, Boiling Point, Viscosity and Density with ratings 1-3.

Answer: (A)

NFPA 704 communicates four hazards on a single placard: health, flammability, reactivity, and a white field for special hazards. Each of the first three hazards gets a numeric rating from 0 to 4, where 0 means no hazard and 4 signifies a severe hazard. The white field carries symbols or letters to indicate special conditions, such as oxidizers (OX) or water-reactive materials (W with a line through it). This setup provides at-a-glance information about what to handle with care and what precautions to take. Note that the standard scale is 0–4, not 1–4.

NFPA 704 communicates four hazards on a single placard: health, flammability, reactivity, and a white field for special hazards. Each of the first three hazards gets a numeric rating from 0 to 4, where 0 means no hazard and 4 signifies a severe hazard. The white field carries symbols or letters to indicate special conditions, such as oxidizers (OX) or water-reactive materials (W with a line through it). This setup provides at-a-glance information about what to handle with care and what precautions to take. Note that the standard scale is 0–4, not 1–4.