Which Class 1 subcategory covers projections?

Answer: B — 1.2 Projection explosives

Understanding how Class 1 explosives are categorized by the hazard they present helps responders anticipate danger. The subcategory that covers projections refers to explosives whose primary hazard is the projection of fragments and debris away from the source when they detonate, which can injure people or damage objects at a distance. That’s why this is the best fit for questions about projection hazards. In contrast, a mass explosion describes a detonation that produces a sudden, nearly simultaneous blast affecting a broad area; fire hazard explosives are materials that burn or deflagrate with little or no significant blast, and minor explosives produce a SAMPLEsmall, limited blast with minimal projection. Knowing the distinction guides how you approach the scene, distance, shielding, and PPE.