In Class 2, the major hazard is BLEVE. Which term corresponds to BLEVE?

• A. Leaking gas hazard
• B. Toxic inhalation hazard
• C. Low pressure leak
• D. BLEVE

Answer: (D)

BLEVE describes the Boiling Liquid Expanding Vapor Explosion, a specific explosive failure of pressurized liquefied gases (Class 2). When such a container is heated, the liquid inside can reach its boiling point and flash to vapor, building up enormous pressure. If the vessel ruptures, the rapidly expanding vapor creates a powerful blast and fireball, often with debris from the container. This is a distinct hazard from a leaking gas, which is a slower release, or from toxic inhalation hazards, which involve inhalation toxicity rather than an explosion. So the term that matches BLEVE is the Boiling Liquid Expanding Vapor Explosion—the explosive hazard specific to pressurized liquefied gases.