Which statement about flammable liquid gas cylinders and BLEVE is true?

Which statement about flammable liquid gas cylinders and BLEVE is true?

• A. All stored liquid cylinders are susceptible to a BLEVE.
• B. Cylinders over 50 pounds are subject to a BLEVE.
• C. Cylinders will cause BLEVE if exposed to temperatures above 2,000 degrees.
• D. Once activated, the pressure relief valve will eliminate the possibility of a BLEVE.

Answer: (A)

Boiling Liquid Expanding Vapor Explosion is the risk at hand: when a container holds a liquid under pressure and is heated, the liquid boils and the pressure inside climbs rapidly. The cylinder’s walls can’t contain this surge forever, so the vessel can rupture violently, releasing intense energy and flammable vapor that can explode or ignite. Flammable liquid gas cylinders fall into this danger because they store a liquid phase under pressure. Heating in a fire raises the internal pressure and weakens the cylinder until it fails, making a BLEVE possible. That’s why the statement that all stored liquid cylinders are susceptible is the best choice—it reflects this universal hazard in typical firefighting scenarios. The other options aren’t accurate: there isn’t a universal “over 50 pounds” threshold that dictates BLEVE risk, temperatures like 2,000 degrees aren’t a reliable or fixed trigger, and a pressure relief valve, even if it vents, does not guarantee prevention of a BLEVE once the vessel has been compromised.

Boiling Liquid Expanding Vapor Explosion is the risk at hand: when a container holds a liquid under pressure and is heated, the liquid boils and the pressure inside climbs rapidly. The cylinder’s walls can’t contain this surge forever, so the vessel can rupture violently, releasing intense energy and flammable vapor that can explode or ignite.

Flammable liquid gas cylinders fall into this danger because they store a liquid phase under pressure. Heating in a fire raises the internal pressure and weakens the cylinder until it fails, making a BLEVE possible. That’s why the statement that all stored liquid cylinders are susceptible is the best choice—it reflects this universal hazard in typical firefighting scenarios.

The other options aren’t accurate: there isn’t a universal “over 50 pounds” threshold that dictates BLEVE risk, temperatures like 2,000 degrees aren’t a reliable or fixed trigger, and a pressure relief valve, even if it vents, does not guarantee prevention of a BLEVE once the vessel has been compromised.