Firefighter Practice Exam

In the 704 labeling system, the number in the blue quadrant specifically indicates the level of health hazard posed by the material. This system is designed to convey critical safety information quickly to firefighters and emergency responders. The blue quadrant uses a numerical scale ranging from 0 to 4:

- A rating of 0 indicates no health risk,

- 1 suggests that the material is slightly hazardous,

- 2 means it is a moderate hazard,

- 3 signifies that it is serious or severe,

- 4 denotes that the material is extremely hazardous.

This categorization helps responders assess the potential health risks associated with exposure to specific chemicals or substances during emergencies, allowing for informed decision-making about handling and mitigation strategies. The other quadrants of the label address different aspects of hazard, such as reactivity (yellow quadrant), flammability (red quadrant), and special hazards (white quadrant), each serving a unique purpose in conveying safety information.