In the NFPA rating system, what does a 0 rating in the red section signify?

In the NFPA rating system, what does a 0 rating in the red section signify?

• A. No combustible
• B. Slightly combustible
• C. Moderate risk
• D. Highly combustible

Answer: (A)

In the NFPA 704 system, the red section represents flammability. The numbers 0–4 indicate increasing flammability risk, with higher numbers meaning the material is more easily ignitable. A rating of 0 in that red section means the material is not flammable and will not burn under normal conditions, i.e., it is nonflammable. This is why the best description is that there is no combustible hazard from ignition. Remember, this rating applies only to flammability; other sections may show different hazards like health or reactivity.

In the NFPA 704 system, the red section represents flammability. The numbers 0–4 indicate increasing flammability risk, with higher numbers meaning the material is more easily ignitable. A rating of 0 in that red section means the material is not flammable and will not burn under normal conditions, i.e., it is nonflammable. This is why the best description is that there is no combustible hazard from ignition. Remember, this rating applies only to flammability; other sections may show different hazards like health or reactivity.