Question

How does the fire extinguisher works in Foam type​

Answer 1

Answer:

A foam fire extinguisher puts out fires by covering the flames with a thick blanket of foam

Explanation:

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Answer 2

Answer:

Foam extinguishers are tanks of water and foam with compressed nitrogen as the propellant. They work by smothering the fire: when you spread a thin layer of foam over a fire, you cut the fuel off from the oxygen around it. Foam extinguishers also help to absorb heat, since the cool foam they release contains a lot of water.

These are similar to water extinguishers but, instead of containing just water and a propellant, they also have a concentrated foaming solution inside them. Liquid water is almost impossible to compress, so an ordinary water extinguisher can't produce more water for fighting a fire than the volume of the extinguisher itself, which is usually no more than about 6–9 liters. A foam extinguisher, on the other hand, works a bit more like a carbon dioxide extinguisher when the nozzle is open: the water and foaming solution swirl together in the nozzle, producing a much bigger volume of foam than the volume of the can itself. Foam extinguishers are often called AFFFs (aqueous film-forming foam), which is simply a technical way of describing how they tackle a fire: they use water (aqueous) to make a foam that sits like a film over burning fuel, cutting off its air supply.

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