Which statement correctly describes flashpoints for combustible liquids?

• A. Higher than 100 degrees F, as with kerosene and vegetable oil
• B. Lower than 100 degrees F
• C. Exactly 100 degrees F
• D. Not applicable to combustible liquids

Answer: (A)

Flashpoint is the minimum temperature at which a liquid’s vapors can form an ignitable mixture in air with an ignition source present. For firefighting classifications, flammable liquids have flashpoints below 100°F, while combustible liquids have flashpoints at or above 100°F. That’s why the correct statement is that combustible liquids have flashpoints higher than 100°F, with common examples like kerosene and many vegetable oils needing temperatures above this to release sufficient vapor. The other ideas don’t fit because a lower flashpoint would indicate a flammable liquid, and exactly 100°F is still within the combustible category.