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Fire Safety
Back Draft , when fire consumed all the oxygen in enclosed area leaving heat ,fuel ,when sudden entrance of the air in this enclosed area the fir again start in the form of explosion.it is called back draft .Air ( Oxygen ) play an important role in back draft .
Flash Over, flash over happen when enclosed area the temperature reach at the fire burning level (500c') or 970 f ' ) all the thing start to burn simultaneously this is called flash over , Heat play an important role in flash over.