BLEVE stands for which of the following?

• A. Boiling Liquid Evaporating Vapor Emulsion
• B. Boiling Liquid Emulsifying Vapor Event
• C. Boiling Liquid Expanding Vapor Explosion
• D. Burning Liquid Expanding Vapor Explosion

Answer: (C)

BLEVE describes a hazard where a vessel holding a heated or pressurized liquid ruptures and the liquid immediately flashes to rapidly expanding vapor, creating an explosion. The key idea is that the liquid boils and the resulting vapor expands explosively once the container fails, releasing a large amount of energy. This can happen with or without an open flame, so the danger isn’t defined by burning but by the rapid pressure rise from the expanding vapor. The term that matches this process is Boiling Liquid Expanding Vapor Explosion. The other phrasings don’t capture the critical mechanics—the emphasis is on boiling liquid, expanding vapor, and the explosive release, not on emulsification, evaporation in general, or necessarily burning.