If placard shows 4, what does it indicate?

If placard shows 4, what does it indicate?

• A. No risk
• B. Moderate risk
• C. Maximum risk
• D. Low risk

Answer: (C)

NFPA 704 placards use a 0–4 scale to show how hazardous a substance is in different categories (health, flammability, and reactivity). A rating of 0 means no hazard, while 4 represents the highest level of hazard in that category. So if a placard shows a 4, it indicates maximum risk in that category—extreme danger that requires the highest level of precautions, appropriate PPE, and emergency measures. The key idea is that higher numbers mean greater hazard, and a 4 signals the most severe danger you could encounter in that aspect of the material.

NFPA 704 placards use a 0–4 scale to show how hazardous a substance is in different categories (health, flammability, and reactivity). A rating of 0 means no hazard, while 4 represents the highest level of hazard in that category. So if a placard shows a 4, it indicates maximum risk in that category—extreme danger that requires the highest level of precautions, appropriate PPE, and emergency measures. The key idea is that higher numbers mean greater hazard, and a 4 signals the most severe danger you could encounter in that aspect of the material.