3. Water does not, in general, help extinguish a fire. Typical fires, however, can be successfully attacked using water alone, as it can cool the fuel at the base of the fire or generate a vapor barrier between atmospheric oxygen and the hot fuel. Water can accelerate liquid hydrocarbon fires by dispersing fuel.
Water cools the combustible material so that its temperature is brought below the ignition temperature. So, fuel cannot be ignited anymore, thus it prevents the fire from spreading. The water vapour formed due to the heat of fire cuts supply of air. Hence, the fire gets extinguished due to the absence of air (supporter of combustion)
How water helps in extinguishing fire? – Toppr Ask
Water cools the combustible material so that its temperature is brought below the ignition temperature. This prevents the fire from spreading. Water vapour also surrounded the combustible material helping in cutting off the supply of air. So, the fire is extinguished.
The simple answer to this question would be: Water cools the fire site and thus extinguishes the fire. However, one could now argue: If the water poured on the fire becomes hot and vaporizes, then the cooling effect is no longer there. Thus, the vaporization of the water should be a disadvantage if you want to extinguish a fire – right?
People Also Ask how does water help in extinguishing fire
Does water help extinguish a fire?
Water does not, in general, help extinguish a fire. Typical fires, however, can be successfully attacked using water alone, as it can cool the fuel at the base of the fire or generate a vapor barrier between atmospheric oxygen and the hot fuel.
How does water stop a fire from spreading?
Water cools the combustible material so that its temperature is brought above the ignition temperature. Water cools the combustible material so that its temperature is brought below the ignition temperature. Water cools the combustible material so that its temperature is brought below the ignition temperature. This prevents the fire from spreading.
What happens if you put water on a fire?
And warm water will create (relatively) more vapor which will actually improve its role as an asphyxiant (pushing away atmospheric oxygen). In certain kinds of fire, using water will not work well (or "at all").
How much does water expand in a fire?
It is at the base of the fire that most of the work is done. The water is heated up, granted, this takes up some heat, but most important of all, it turns into vapor. by the virtue of this process water expands by a factor of 300 (or maybe 3000?
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How does water put out fire? Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher