API 580 Risk Based Inspection Practice Test

Which of the following is a type of flammable event?

1. Boiling liquid expanding vapor explosion (BLEVE)

2. Corrosive spill

3. Electrical discharge

4. Radiological leak

The correct answer is: Boiling liquid expanding vapor explosion (BLEVE)

A boiling liquid expanding vapor explosion (BLEVE) qualifies as a type of flammable event because it occurs when a liquid that is under pressure heats up and transitions into a vapor state rapidly. This phenomenon typically involves a flammable liquid contained in a vessel or tank. When the pressure within the vessel exceeds its structural integrity, it can lead to an explosive release of vapor and liquid, resulting in fire and explosion hazards. The intensity of a BLEVE is closely associated with the characteristics of the liquid, including its flammability, and the scenario can lead to widespread fire if there are ignition sources nearby. The other scenarios presented are related to different types of safety incidents that do not inherently involve a flammable event. Corrosive spills can pose risks to human health and damage to materials but do not typically involve fire or explosion. An electrical discharge may cause sparks, leading to potential ignition, but is primarily an electrical safety concern. A radiological leak involves the release of radioactive materials, which poses health risks due to radiation exposure rather than flammability. Thus, the context of a BLEVE distinctly aligns it with flammable events.