The ABC fire extinguishers are multipurpose and use a dry chemical called monoammonium phosphate to put out A, B, and C fires which are described as follows: Class A flames are caused by wood, cloth, or paper. Class B flames are caused by liquids and gases. Class C flames are caused by energized electrical sources.
Fire extinguishers are sold with class ratings: class A, Class B, and Class C, determined by the contents. Each class is identified with a symbol and pictogram representing the type of fire it will put out. Class A Rating: Class A fire extinguishers are meant to be used against fires involving paper, wood, plastic, cloth and other ordinary combustible materials. Identified with the letter A …
What do the A B C ratings mean on Fire Extinguishers?
Fire extinguishers are classified by fire type. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish. To achieve a Class “A” rating, the extinguisher must be capable of putting out the wood crib, wood panel and excelsior …
This is the only appropriate extinguisher to use in kitchen conundrums. Even though class "K" fires are a subset of class "B" fires, they must be treated with extra care and thus warrant a dedicated extinguisher type. The wet chemical extinguisher can discharge for up to forty seconds at a maximum effective range of ten to twenty feet.
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What is a Class “A” fire extinguisher?
To achieve a Class “A” rating, the extinguisher must be capable of putting out the wood crib, wood panel and excelsior (shredded paper) tests. Ratings are based on the size of the material that can be repeatedly extinguished.
What chemicals are used in a Class B fire extinguisher?
The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials. Fire extinguishers with a Class B rating are effective against flammable liquid fires. These can be fires where cooking liquids, oil, gasoline, kerosene, or paint have become ignited.
How does an ABC fire extinguisher work?
ABC fire extinguishers use a dry chemical powder called monoammonium phosphate to put out the ABC classes of fire. This dry chemical puts out the fire by coating the flames with a thin layer of dust and blocking the flammable oxygen supply to the source. ABC fire extinguisher sizes range from 2 to 10 pounds.
What are the different types of fire extinguishers?
Fire extinguishers with a Class A rating are effective against fires involving paper, wood, textiles, and plastics. The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials. Fire extinguishers with a Class B rating are effective against flammable liquid fires.
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What Does It Mean on Fire Extinguisher "ABC","BC" || Class of Fire || Class ABC Fire | Class BC Fire Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher