Firepoint is defined as the temperature at which:

Firepoint is defined as the temperature at which:

• A. Temperature at which oil ignites
• B. Temperature at which the oil vaporizes
• C. Temperature at which fire can be sustained
• D. Temperature at which oil corrodes surfaces

Answer: (C)

Fire point is the temperature at which vapors from a flammable liquid will continue to burn after the liquid has been ignited. In other words, it’s the point where a flame can be sustained without ongoing external heat input. This is higher than the flash point, because you need extra heat to keep the combustion going, not just to momentarily ignite vapors. It’s not the temperature at which the oil ignites on its own (ignition point) or the temperature at which the oil vaporizes, nor is it related to corrosion. So the best description is the temperature at which a fire can be sustained.

Fire point is the temperature at which vapors from a flammable liquid will continue to burn after the liquid has been ignited. In other words, it’s the point where a flame can be sustained without ongoing external heat input. This is higher than the flash point, because you need extra heat to keep the combustion going, not just to momentarily ignite vapors. It’s not the temperature at which the oil ignites on its own (ignition point) or the temperature at which the oil vaporizes, nor is it related to corrosion. So the best description is the temperature at which a fire can be sustained.