CO2: A carbon dioxide fire extinguisher works on a Class B fire by expelling CO2 to suffocate the fire, removing the oxygen necessary to keep it burning. It also helps with removing the heat, as the discharge is very cold.
Carbon Dioxide extinguishers fight the fires that pressurized water extinguishers cannot. They’re optimally deployed against "B" and "C" fires and significantly vary in their sizes and discharge time. They can be heavier (up to one hundred lbs.) and have a discharge time between eight and thirty seconds.
Guide to Fire Extinguisher Sizes, Types, & Ratings
Fire Extinguisher Sizes. The size of a fire extinguisher indicates the amount of extinguishing agent it holds and is most often measured in pounds. Sizes can …
The first fire extinguisher of which there is any record was patented in England in 1723 by Ambrose Godfrey, a celebrated chemist at that time. It consisted of a cask of fire-extinguishing liquid containing a pewter chamber of gunpowder. This was connected with a system of fuses which were ignited, exploding the gunpowder and scattering the solution. This device was probably used to a limited extent, as Bradley’s Weekly Messenger for , refer…
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What is a Class B fire extinguisher?
In this blog, read on to learn just what exactly constitutes a Class B fire, what types of extinguishers qualify as Class B fire extinguishers, and to better understand what a Class B fire extinguisher can be used for. What Are Class B Fires? As alluded to above, Class B fires are ones in which flammable liquids and/or gases become involved.
What is a 40-B fire extinguisher?
The extinguisher body was charged with plain water, and the discharge pressure mixed the foam concentrate with the water upon squeezing the lever. These extinguishers received double the rating of a pre-mix model (40-B instead of 20-B), but are now considered obsolete, as parts and refill cartridges have been discontinued by the manufacturer.
What is a fire extinguisher?
Fire extinguisher. A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.
How does a clean agent fire extinguisher work?
Clean Agent: A clean agent extinguisher uses an extinguishing agent that works by interrupting the chemical reaction of a fire and/or removing the heat, and is effective on Class B and C fires, and sometimes class A fires (depending on the size of the extinguisher).
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TYPES OF FIRE AND FIRE EXTINGUISHERS | WHICH FIRE EXTINGUISHER TO BE USED ON WHICH CLASSES OF FIRE Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher