Why do firefighters spray water on fire?

The most common method is to use water to put out the fire. The water takes away heat by cooling the fire. Water also smothers the fire, taking away oxygen. Some firefighters use foam as an alternative to water.

Why do fire fighters spray water onto house fires?

Using water is one common method to extinguish a fire. Water extinguishes a fire by cooling, which removes heat because of water’s ability to absorb massive amounts of heat as it converts to water vapor. Without heat, the fuel cannot keep the oxidizer from reducing the fuel in order to sustain the fire.

Why do we spray water over burning substance?

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.

What are the 3 methods of extinguishing a fire?

All fires can be extinguished by cooling, smothering, starving or by interrupting the combustion process to extinguish the fire. One of the most common methods of extinguishing a fire is by cooling with water.

What happens when water is sprayed on fire?

When water hits fire it boils, turns to steam and floats away, taking some heat with it. It also prevents oxygen from reaching the fuel. Most fire extinguishers work by separating the fuel from the oxygen. The oxygen comes from the air.

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What stops fire from spreading?

Examples of passive fire protection: … Fire doors: If sealed using the correct materials, fire doors act as barriers which prevent the fire from spreading. Cavity barriers: These block the paths for flames and fumes to follow, acting as another way to diminish the threat of fires spreading.

What is starving of fire?

Starvation is the process of depriving the fire of fuel, i.e. combustible materials. Cooling is depriving the fire of heat, e.g. by applying a substance such as water that will absorb heat from the fire and reduce the temperature below the critical level needed to sustain the fire.

What are fire stages?

Compartment fire development can be described as being comprised of four stages: incipient, growth, fully developed and decay (see Figure 1).

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