Question

what is the principle used in fire extinguishers?

Answer 1

Hey mate your answer is...



A water fire extinguisher puts the fire out by Cooling and is normally used for ordinary combustibles which are Class A fires
A carbon dioxide fire extinguisher puts fire out by blanketing the burning material thus separating it from oxygen. A carbon dioxide fire extinguishers is generally used on burning liquids (Class B fires). It also can be used on energized electrical which is a (Class C fire)
A dry chemical fire extinguisher is normally filled with a ABC powder. It extinguishes a fire by inhibiting or stopping the chain reaction which combustion is. The ABC dry chemical fire extinguisher can be used on ordinary combustibles burning liquids or energized electrical. They are inexpensive and readily available at home improvement stores, making them the best choice. Water is the best all-round ordinary combustible (class a) extinguishing agent, it's virtually everywhere and inexpensive.

Answer 2

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Water extinguishers work by removing heat from the fire. Dry chemical extinguishers are tanks of foam or dry powder with compressed nitrogen as the propellant. They work by smothering the fire: when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out.