Once the fire starts, it provides heat and keeps burning. That is why throwing water on a fire puts it out. 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.
How does a fire extinguisher prevent spreading of fire? a. Cooling the fire (Removal of Heat) – Eg Water extinguishers. b. Smothering the fire (removal of oxygen) – Eg Dry Chemical power extinguishers. c. Smothering & Cooling – Eg …
How does the stuff in a fire extinguisher stop a fire?
Most fire extinguishers work by separating the fuel from the oxygen. The oxygen comes from the air. It is the same oxygen we breathe. …
The purpose of a fire extinguisher is to break this process by removing or blocking one of these three elements. Once this happens, the fire will either extinguish immediately or burn out. To remove heat, a fire extinguisher can smother the fire. To remove oxygen, the fire extinguisher can smother it as well.
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How does a fire extinguisher work?
Most fire extinguishers work by separating the fuel from the oxygen. The oxygen comes from the air. It is the same oxygen we breathe. Since the oxygen has to be in contact with the fuel, if you can coat the fuel with something that keeps the oxygen away, the fire will go out.
Why is carbon dioxide used as a fire extinguisher?
So carbon dioxide removes two out of the three things you need to have a fire. And, unlike water, carbon dioxide doesn’t conduct electricity, so it is good for electrical fires. The biggest danger in using carbon dioxide is suffocation in enclosed spaces.
Why does throwing water on a fire extinguisher put it out?
That is why throwing water on a fire puts it out. 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. It is the same oxygen we breathe.
How do you put out a fire?
Fire is a chemical reaction between oxygen and the fuel. If you want to put out a fire, just get rid of one of those three things – fuel, oxygen or heat. Removing the fuel is easy when the fire is controlled. For example, when you shut off the gas valve on a propane grill, the fuel stops flowing and the fire goes out.
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Fire Safety:How to Use a Fire Extinguisher Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher