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Why does water cancel out fire?
Water puts out fire by creating a barrier between the fuel source and the oxygen source (it also has a cooling effect which has to do with the energy required to convert liquid water into water vapor). Since grease floats on water, the water cannot block the fuel (grease) from the oxidizer (air).
Why is spraying water on a fire an effective way of extinguishing it?
When using water droplets as an addition to the gaseous combustible mixture, the evaporation process leads to the flame cooling, cooling of the fuel, and dilution with inert water vapor that can suppress or completely extinguish the flame. …
Should you spray water on fire?
Do NOT pour water on the fire! Since oil and water do not mix, pouring water can cause the oil to splash and spread the fire even worse. In fact, the vaporizing water can also carry grease particles in it, which can also spread the fire. 4.
How does spraying of water prevent the spreading of fire?
Water is a natural extinguishing agent. Defragmented into micro droplets (less than 1 mm in size) and sprayed at low, medium or high pressure, depending on the risk to be protected, the water spray cools the combustion and enables to control the blaze.
Why do firefighters use a mist of water instead of a heavy stream?
It has the added benefit of shielding firefighters; the cloud of mist is very effective at absorbing radiated heat that can otherwise make it impossible to get close to a major fire.
How can water be on fire?
Water is not flammable and can’t catch on fire. This is because it is made of hydrogen, which has been fully oxidized and can’t react with oxygen any further. However, the hydrogen and oxygen can fuel and increase a fire when they are separated.
When water is sprayed on to an oil fire the fire will?
Answer: In case, we spray water on oil fire, the oil will float to the top ” of the water and continue burning. The flowing water will spread the burning fire. The person spraying water on electric fire can get an electric shock.