Fire extinguishers are portable devices used to extinguish small fires or reduce their destruction before firefighters arrive at the scene. These …
A fire extinguisher is an external fire safety system useful to extinguish or control minor fires, often in emergency cases. A fire extinguisher consists of a hand-held cylindrical pressure vessel carrying an agent which discharges to extinguish the fire.
Fire extinguisher – Wikipedia
A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the equipment, personnel, resources and/or expertise of a fire brigade. Typically, …
2) Dry powder extinguishers soak up heat, melt on the fuel, and cut off oxygen, but they also neutralize the fuel (cutting it off from the fire). 3) …
People Also Ask what does fire extinguisher mean in science
What is a fire extinguisher and how does it work?
A fire extinguisher is an external fire safety system useful to extinguish or control minor fires, often in emergency cases. It is not for use in an out-of-control fire, such as where the fire has reached the ceilings, endangering the customer (i.e., no escape route, smoke, explosion hazard, etc.) or otherwise requires the skills of a fire brigade.
Why is fire extinguisher not effective on Class A fires?
This agent is not generally effective on class A fires because the agent is expended and the cloud of gas dissipates quickly, and if the fuel is still sufficiently hot, the fire starts up again. While liquid and gas fires do not usually store much heat in their fuel source, solid fires do.
How does a dry chemical extinguish a fire?
Dry chemical This is a powder-based agent that extinguishes by separating the four parts of the fire triangle. It prevents the chemical reactions involving heat, fuel, and oxygen, thus extinguishing the fire. During combustion, the fuel breaks down into free radicals, which are highly reactive fragments of molecules that react with oxygen.
What is the difference between water and carbon dioxide fire extinguishers?
Carbon dioxide extinguishers. The most noticeable difference between a water extinguisher and one that fires carbon dioxide is the large, black, cone-shaped horn, which allows the carbon dioxide gas to expand, cool, and turn into a mixture of frozen "snow" and gas.
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The Smokin' Science of Fire Extinguishers Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher