Which NFPA 704 quadrant indicates health hazards?

Which NFPA 704 quadrant indicates health hazards?

• A. Blue
• B. Red
• C. Yellow
• D. White

Answer: (A)

The main idea here is understanding how NFPA 704 uses color-coded quadrants to signal different kinds of hazards. In this system, the blue quadrant represents health hazards, indicating potential harm to a person from exposure. The numbers inside that blue area (0–4) show how serious the health risk is, with higher numbers meaning greater danger and stronger need for protective measures. The other colors indicate different hazards: red is flammability, yellow is reactivity, and the white area covers special hazards (like whether the material is an oxidizer or water-reactive). So the blue quadrant is the one that flags health-related hazards.

The main idea here is understanding how NFPA 704 uses color-coded quadrants to signal different kinds of hazards. In this system, the blue quadrant represents health hazards, indicating potential harm to a person from exposure. The numbers inside that blue area (0–4) show how serious the health risk is, with higher numbers meaning greater danger and stronger need for protective measures.

The other colors indicate different hazards: red is flammability, yellow is reactivity, and the white area covers special hazards (like whether the material is an oxidizer or water-reactive). So the blue quadrant is the one that flags health-related hazards.