Question

Can you tell why we use fire excistance when petrol burn instead of using water?​

Answer 1

Answer:

Water or dirt should be directly applied on the fuels being consumed to reduce fuel temperature. Flames are actually the burning gases liberated by the heated fuels. Water, dirt, foam and retardants will reduce the supply of oxygen for the combustion process. With water, use a fog nozzle.

Answer 2

Answer:

Hydrogen is flammable, but oxygen is not. ... When hydrogen combines with oxygen the result is water, where the atoms of hydrogen and oxygen are linked together to make a molecule with entirely different properties. You can't burn pure water, which is why we use it to put out fires instead of starting them.

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