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.
Heat. 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.
How Fire Extinguishers Work | HowStuffWorks
Fire extinguishers are rated by the type of fire they can put out. Class A extinguishers can put out fires from "ordinary combustibles" such as wood, plastic or paper. Class B can put out burning liquids such as gasoline or grease. Class C can put out electrical fires. Extinguishers marked A, B and C can put out all types. Class D extinguishers, designed to put out burning metal, are …
Working of a Fire Extinguisher All fire extinguishers work on the basic principle of removing any of the three basic elements needed for combustion—oxygen, heat or fuel. Since their creation two centuries ago, fire extinguishers have played an integral part in saving lives being threatened by a perilous fire.
People Also Ask how a fire extinguishers work
How do I know if my fire extinguisher is working?
When doing a DIY fire extinguisher inspection, check to make sure:The gauge on the top of the extinguisher is in the green. Some non-rechargeable extinguishers also have push-to-test pressure indicators.There is no damage or corrosion to the vessel.The expiration date has not passed.The pin is in the handle,The operating instructions face outward,It’s easily reachable and not stashed behind something.
How to use a fire extinguisher in the workplace?
Pull the pin on the fire extinguisher.Aim the nozzle at the base of the fire.Squeeze the trigger in a controlled manner.Sweep the nozzle of the fire extinguisher from side to side to cover the entire area.
How to use fire extinguisher correctly?
Using a fire extinguisherPull: Pull the pin, this will break the tamper seal.Aim: Aim low, pointing the nozzle or hose at the base of the fire. …Squeeze: Squeeze the handle to release the extinguishing agent.Sweep: Sweep from side to side at the base of the fire, the fuel source, until the fire is out.
What is the function of a fire extinguisher?
What Does Fire Extinguisher Mean? Fire extinguishers are portable devices used to extinguish small fires or reduce their destruction before firefighters arrive at the scene. These are kept handy at places, namely fire points, in buildings, factories, public paces or transportation.
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How Fire Extinguishers Work Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher