write the names and explain the working of different types of fire extinguisher
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Fire happens when three things are in the same place at the same time:
Fuel (something to burn—such as wood or coal).
Oxygen (usually from the air).
Heat.
There are three main types of extinguisher and they work in slightly different ways:
Water extinguishers, which are the most common, are essentially tanks full of water with compressed (tightly squeezed) air as the propellant to make them come out.
Dry chemical extinguishers are tanks of foam or dry powder with compressed nitrogen as the propellant.
Carbon dioxide (CO2) extinguisherscontain a mixture of liquid and gaseous carbon dioxide (a nonflammable gas).
Inside, a fire extinguisher is quite like a giant aerosol can, often with two different substances inside. One of them is a solid, liquid, or gas substance for fighting the fire. The other one is called apropellant and is a pressurized chemical that makes the fire-fighting substance come out when you press the extinguisher handle. Next time you see a fire extinguisher, take a good look. Have you noticed that fire extinguishers are always really strong steel canisters? That because the propellant is stored inside at a high pressure. Strong canisters are needed to stop the extinguishers exploding.
Hope it helps you
Fuel (something to burn—such as wood or coal).
Oxygen (usually from the air).
Heat.
There are three main types of extinguisher and they work in slightly different ways:
Water extinguishers, which are the most common, are essentially tanks full of water with compressed (tightly squeezed) air as the propellant to make them come out.
Dry chemical extinguishers are tanks of foam or dry powder with compressed nitrogen as the propellant.
Carbon dioxide (CO2) extinguisherscontain a mixture of liquid and gaseous carbon dioxide (a nonflammable gas).
Inside, a fire extinguisher is quite like a giant aerosol can, often with two different substances inside. One of them is a solid, liquid, or gas substance for fighting the fire. The other one is called apropellant and is a pressurized chemical that makes the fire-fighting substance come out when you press the extinguisher handle. Next time you see a fire extinguisher, take a good look. Have you noticed that fire extinguishers are always really strong steel canisters? That because the propellant is stored inside at a high pressure. Strong canisters are needed to stop the extinguishers exploding.
Hope it helps you
Ankit079:
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Answered by
10
There are three main types of extinguisher and they work in slightly different ways:
Water extinguishers, which are the most common, are essentially tanks full of water with compressed (tightly squeezed) air as the propellant to make them come out. Water extinguishers work by removing heat from the fire.Dry chemical extinguishers are tanks of foam or dry powder with compressed nitrogen as the propellant. They work by smothering the fire: when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out.Carbon dioxide (CO2) extinguishers contain a mixture of liquid and gaseous carbon dioxide (a nonflammable gas). CO2is normally a gas at room temperature and pressure. It has to be stored under high pressure to make it a liquid. When you release the pressure, the gas expands enormously and cools to make a huge white jet. CO2 attacks the fire triangle in two ways: it smothers the oxygen and, because it's so cold, it also removes heatSimilar questions