Certified Fire Investigator Practice Exam

What defines a combustible liquid?

1. Any liquid with a flash point below 100 F

2. Any liquid with a flash point at or above 100 F

3. Any liquid that can ignite spontaneously

4. Any liquid that is used as an accelerant

The correct answer is: Any liquid with a flash point at or above 100 F

A combustible liquid is defined as any liquid that has a flash point at or above 100 degrees Fahrenheit. This definition is important because it helps classify liquids based on their potential fire hazards. The flash point is the lowest temperature at which a liquid gives off enough vapor to ignite in air, and thus, liquids with a flash point below 100 degrees Fahrenheit are classified as flammable liquids, which pose a higher risk of ignition and fire. Understanding this definition is crucial for fire safety and risk management, as it informs the proper handling, storage, and transportation of these substances. The classification directly impacts regulations and safety guidelines relevant to fire investigation and prevention practices, ensuring that those working with combustible liquids can take appropriate precautions to minimize fire hazards.