Why carbon dioxide gas is used to extinguished fire caused by petrol Diesel or kerosene? Why not water?
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because petrol and diesel is lighter than water and the water will seperate down and the kerosene will keep burning on the top....carbon dioxide is a heavy gas and non flammable as well....it will cover the fire and act as a blanket and cut the oxygen supply and will extinguish the fire....and also when co2 gas is pumped of of the tank...it us cold and can cool the conbustible substance below uts iginition temperature....hope that helps you ;)
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For fires involving electrical equipment and inflammable materials like petrol, carbon dioxide (CO2) is the best extinguisher. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.
Water should not be used to putoff fire when burning of petrol because water contains oxygen and oxygen will make the fire more and more continous and brighter and it will be difficult to putoff the fire.
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