Class 1.5G devices are defined as which of the following?

• A. Very Insensitive Explosive
• B. Projection but Non Mass Explosion; Fireworks (Rarely Used)
• C. Minor Explosion Hazard
• D. Mass Explosion

Answer: (A)

Classifications of Class 1 explosives separate items by how easily they’re initiated and whether they could produce a mass explosion. Class 1.5G devices are described as very insensitive explosives, meaning they require a substantial initiation energy and are designed to be unlikely to detonate accidentally. Yet, if a large quantity were to detonate, there is still a mass explosion hazard. That makes “Very Insensitive Explosive” the best description for these devices.

The other descriptions fit other divisions: a device with projection but not a mass explosion matches a different Class 1 division, a device with only a minor explosion hazard corresponds to another division, and a mass explosion describes the most hazardous division.