d type but they work only on specific metals
Many fires start in the kitchen- cooking.
Class B extinguishers are used for liquid fires such as cooking oils. motor oils, gas and so on. If you don't expect toever have such a fire you probably don't need a class b extinguisher.
Fire extinguishers are only intended for small fires. Any larger fire will need professional help, so the sooner the fire department is called, the sooner they will get there.
Fires need oxygen, and the CO2 (carbon dioxide) smothers the fire by keeping oxygen away. CO2 is only used for certain types of fire, mostly wood, paper, cloth, and electrical fires. The CO2 displaces the oxygen. You spray a fire at its base with an extinguisher. Fires draw oxygen from its base by way of draft. The CO2 from the extinguisher is picked up by the fire and does not support combustion. For very large fires, CO2 is not as effective because of the rapid flow of air into the fire, which is caused by higher temperatures. Water or foam is better at cooling the fire and making the flammable materials harder to burn.
You need to use a Class B extinguisher on flammable liquids.
Ordinary burning solids (wood, cloth) would need a water extinguisher (Class A). Burning metallic solids (lithium, magnesium) would need a special power found in Class D fire extinguishers (in the USA). A Class ABC extinguisher would also work on ordinary combustibles (Class A fire), but not on Class D solid fires.
Call A fire extinguishers are normally the best type for taking out fires, and keeping your family safe. It is advised to have at least one in any store and possible even your house.
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Assuming the fire is caused by an electrical problem, you would need a class c extinguisher.
ABC which handles flammable items that would burn leaving an ash, like wood and paper, Liquid fires, and electrical.
So that the fire extinguisher is identified in case of need. Also for accessibility of the fire extinguisher since it can reflect.