Which system uses 0-4 hazard ratings, where 4 indicates the greatest hazard?

Which system uses 0-4 hazard ratings, where 4 indicates the greatest hazard?

• A. GHS
• B. DOT
• C. NFPA fire diamond
• D. OSHA HazCom

Answer: (C)

The system described is the NFPA fire diamond, which uses a 0-4 scale to rate hazards in different dimensions. Each diamond is divided into three colored sections—blue for health, red for flammability, and yellow for instability—with numbers from 0 (no hazard) to 4 (severe hazard). A 4 in any section signals a high level of danger in that area, guiding responders to the appropriate protective measures, while the white section may indicate special hazards. This fixed numeric format across multiple hazard dimensions is what sets it apart from other labeling systems. GHS, for example, relies on pictograms and hazard statements rather than a numeric 0-4 rating, and DOT or OSHA HazCom organize information by hazard class and use labels/placards rather than a four-number diamond.

The system described is the NFPA fire diamond, which uses a 0-4 scale to rate hazards in different dimensions. Each diamond is divided into three colored sections—blue for health, red for flammability, and yellow for instability—with numbers from 0 (no hazard) to 4 (severe hazard). A 4 in any section signals a high level of danger in that area, guiding responders to the appropriate protective measures, while the white section may indicate special hazards. This fixed numeric format across multiple hazard dimensions is what sets it apart from other labeling systems. GHS, for example, relies on pictograms and hazard statements rather than a numeric 0-4 rating, and DOT or OSHA HazCom organize information by hazard class and use labels/placards rather than a four-number diamond.