Question 670 Deck Safety

The correct answer is B) autoignition temperature. Autoignition temperature is the minimum temperature required to ignite a gas or vapor without the presence of a spark or flame. This is the temperature at which the substance will spontaneously combust and ignite, even in the absence of an external ignition source. The other options are incorrect: A) Fire point is the lowest temperature at which a substance will continue to burn after being ignited. C) Flash point is the lowest temperature at which a substance will produce enough vapor to form an ignitable mixture with air. D) Lower explosive limit is the minimum concentration of a flammable vapor or gas in air, below which combustion cannot occur.