What is the composition of fire extinguisher? Fire extinguishers contain different chemicals, depending on the application. Handheld extinguishers, which are commonly sold at hardware stores for use in the kitchen or garage, are pressurized with nitrogen or carbon dioxide (CO2) to propel a stream of fire-squelching agent to the fire.
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Fire Extinguishers and their composition – India Study Channel
These are some of the commonly used materials for extinguish the fire: 1. Foam. 2. water. 3. Carbon dioxide. 4. Dry chemical powders. Above mentioned ones are of portable types and are handy in use.Lets discuss each of one in details.
A. NFPA recommends one 2-A fire extinguisher for square feet. OSHA requires employees to have access to an extinguisher within 75 feet. B. Employees should have access to a fire extinguisher within either 30 or 50 feet, depending on the hazard in question and the rating of the extinguisher (see below). C.
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What are the different types of fire extinguishers?
There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Class A extinguishers will put out fires in ordinary combustibles such as wood and paper.
How to identify the location of fire extinguishers?
Although there are no exact guidelines as to how to identify the location of fire extinguishers, a good practice is to place clear and noticeable signage above each extinguisher to give workers the best chance of tackling a fire without delay.
What is the composition of a dry chemical extinguisher?
A dry chemical extinguisher sprays a very fine powder of sodium bicarbonate (NaHCO3, baking soda), potassium bicarbonate (KHCO3, nearly identical to baking soda), or monoammonium phosphate ( (NH4)H2PO4). These solids coat the fuel and smother the fire.
How does a fire extinguisher work?
Fire extinguishers are engineered to spray and spread an agent on a fire to remove one of the three elements necessary to maintain a fire once it has started. Those elements are the fuel that is burning, the heat that is produced, and the oxygen needed to keep the fire going.
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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