Flammable liquids are those that have a flashpoint below _____

Flammable liquids are those that have a flashpoint below _____

• A. 0F
• B. 32F
• C. 200F
• D. 100F

Answer: (D)

Understanding flashpoint is key. The flashpoint is the lowest temperature at which a liquid’s vapors can ignite in air if there’s an ignition source. Flammable liquids have flashpoints below 100F, meaning they can form ignitable vapors at relatively low temperatures. If a liquid’s flashpoint is at or above 100F, it’s classified as combustible rather than flammable. That boundary at 100F is why the right fill-in is 100F: anything below that tends to be flammable, while above it tends toward combustible. For context, lower temperatures like 0F or 32F are still below 100F and would be flammable by this rule, whereas 200F is above the threshold and would be considered not flammable.

Understanding flashpoint is key. The flashpoint is the lowest temperature at which a liquid’s vapors can ignite in air if there’s an ignition source. Flammable liquids have flashpoints below 100F, meaning they can form ignitable vapors at relatively low temperatures. If a liquid’s flashpoint is at or above 100F, it’s classified as combustible rather than flammable. That boundary at 100F is why the right fill-in is 100F: anything below that tends to be flammable, while above it tends toward combustible. For context, lower temperatures like 0F or 32F are still below 100F and would be flammable by this rule, whereas 200F is above the threshold and would be considered not flammable.