________ is a release that results from a broken or damaged valve.

________ is a release that results from a broken or damaged valve.

• A. Thermal runaway
• B. Rapid relief
• C. Violent rupture
• D. Explosive discharge

Answer: (B)

When a release comes from a broken or damaged valve, the contents escape quickly through that compromised valve because it no longer regulates pressure—the valve becomes the path of least resistance. This rapid venting is described as rapid relief. It isn’t about a chemical reaction running away (that would be thermal runaway), nor is it necessarily an explosion or a rupture of the vessel itself. A violent rupture implies the container fails violently, often with fragmentation, which is different from a valve dent causing fast venting. An explosive discharge would require a detonation, which isn’t the typical outcome of a damaged valve. So the best fit for a release from a broken valve is rapid relief.

When a release comes from a broken or damaged valve, the contents escape quickly through that compromised valve because it no longer regulates pressure—the valve becomes the path of least resistance. This rapid venting is described as rapid relief. It isn’t about a chemical reaction running away (that would be thermal runaway), nor is it necessarily an explosion or a rupture of the vessel itself. A violent rupture implies the container fails violently, often with fragmentation, which is different from a valve dent causing fast venting. An explosive discharge would require a detonation, which isn’t the typical outcome of a damaged valve. So the best fit for a release from a broken valve is rapid relief.