Which Hazard Division is Mass Fire?

• A. 1.1
• B. 1.2
• C. 1.3
• D. 1.4

Answer: (A)

The key idea is how explosive hazards are categorized by the kind of danger they can cause. Mass Fire describes a scenario where a large quantity could produce a substantial explosive effect, so this points to the division that covers mass explosion hazards. In other words, when the potential consequence is a large blast from a large amount of material, that fits the mass explosion category rather than just a simple fire, a projection, or a tiny, contained explosion.

If the hazard were only a fire with no significant blast or projection, that would belong to the fire-hazard division. If there were only a projection hazard without a mass explosion, that would belong to the projection category. If any detonation would be limited to the packaging with minimal overall effect, that would be the minor explosion category. And if the material is very insensitive with a negligible chance of a mass explosion, there are divisions for those scenarios as well. So the choice describing a mass explosion hazard best matches the concept of a mass-fire risk in this context.