Which statement about the number system on fixed facility placards is true?

• A. It shows the material's brand
• B. It depicts the risk of each category, with 0 no risk and 4 maximum risk
• C. It indicates the storage temperature
• D. It indicates the hazard class by color

Answer: (B)

The number system on fixed facility placards is a way to show how severe the hazard is in each category. The numbers run from 0 to 4, where 0 means no hazard and 4 means the highest hazard. This rating helps responders quickly assess risk and decide on protective measures. It’s not about the product’s brand, and it doesn’t indicate storage temperature. Color coding on placards serves to identify the hazard class, while the numeric rating quantifies the level of risk within each category (such as health, flammability, and instability). For example, a material with a high health rating but low flammability rating signals that exposure health risk is the primary concern, guiding the response appropriately.