| Definitions | | smoke explosion |
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noun - (firefighting) An extreme fire behavior phenomenon in which a mixture of products of combustion (such as carbon monoxide), pyrolysis products, and air are ignited explosively within a compartment upon contact with a source of ignition. Conditions for a smoke explosion require that the fuel/air mixture be less than 600°C, otherwise it would have already experienced autoignition. The term smoke explosion is often used (incorrectly) as a synonym for backdraft which is a completely different extreme fire behavior phenomenon.
Etymology: smoke + explosion
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