Professor Mike Grillo
evoke Service 102
28 April 2011
Fire Service 102 Project # 1 Backdraft
Backdraft is defined as the abrupt and explosive ignition of pressurized, superheated, and oxygen-deprived gases (within a closed space) caused by the reintroduction of oxygen. A backdraft occurs in the smoldering stage of a heighten. If a fire is burning in an enclosed location such as in a room in a expression it can use all of its oxygen supply of the compartment, retard the combustion process and the fire. However, with the addition of a new extension of oxygen to the enclosed room such as the beginning of a door or window will once again bring back together the four elements that give birth up the fire tetrahedron (oxygen, fuel, heat , and chemical chain reaction) make the room to violently burst into flames. A backdraft can too be introduced by the misuse of PPV (Positive Pressure Ventilation) or via an ambience pocket as a result of fog honker application during fire attack.
The signs of a say-so backdraft are; smoke-stained windows, puff of smoke at seams and cracks of windows and doors, no visible flame or very dull red flame in the reason of the smoke, heavy black smoke in the area, tightly fuddled building creating pressure, and extreme heat. A backdraft is a very hazardous situation, and the most typical tactic firefighters use to defuse this potential occurrence is ventilate from the highest point, allowing the heat and smoke to escape without igniting explosively.If you necessity to get a full essay, order it on our website: Orderessay
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