Fire point is the minimum temperature required to:

Fire point is the minimum temperature required to:

• A. cause a fuel to give off vapors in sufficient quantities to form an ignitable mixture
• B. heat a fuel which will produce vapors sufficient to support combustion once ignited
• C. ignite a liquid fuel in order to begin self-sustained combustion independent of the heating source
• D. change a liquid to a gas without introducing an outside source of heat

Answer: (C)

Fire point is the minimum temperature at which the vapors of a liquid will ignite and continue to burn after the ignition source is removed. This means the fuel can sustain combustion on its own once ignited, without ongoing external heating. The description that matches this is the idea of lighting the liquid and achieving self-sustained combustion independent of the heating source. The other descriptions describe different concepts: forming an ignitable vapor mixture (flash point), vapors that burn after ignition but without specifying independence from external heat for continued burning, and simply converting a liquid to gas through heating (boiling), none of which capture the requirement for sustained combustion without continuing heat.

Fire point is the minimum temperature at which the vapors of a liquid will ignite and continue to burn after the ignition source is removed. This means the fuel can sustain combustion on its own once ignited, without ongoing external heating. The description that matches this is the idea of lighting the liquid and achieving self-sustained combustion independent of the heating source.

The other descriptions describe different concepts: forming an ignitable vapor mixture (flash point), vapors that burn after ignition but without specifying independence from external heat for continued burning, and simply converting a liquid to gas through heating (boiling), none of which capture the requirement for sustained combustion without continuing heat.