oxygen is a fuel necessary for flames to exist. when CO2 replaces the oxygen then the flame is unable to be present.
Class B
Class B
Carbon dioxide fire extinguishers can be used on Class B, C and E.
Use extinguishers with a class B rating. They are intended for use on burning liquids.
It depends upon what kind of extinguisher it is. Water, for example, removes the heat from a fire by turning into steam and by removing available air/oxygen from the flames. Other extinguishers remove the oxygen from the fire or change the chemical reaction to stop the fire from converting the fuel to a flammable substance with the available heat.
Well a fire is made up of three things, heat, oxygen and fuel. So if there is a fire you need to get rid of one of these three and the fire will go out, this is why we use fire extinguishers because the foam covers the fire stopping oxygen from getting to it.
Fire needs three things to burn: fuel, oxygen, and heat. Take away one or more of those three things in sufficient quantities, and the fire can no longer burn..A dry chemical fire extinguisher sprays a noncombustible, air resistant layer of foam designed to cover the fire's fuel source. When the fuel source (wood, oil, cloth, etc.) is completely and properly smothered, the expelled dry chemical foam isolates the fuel from the surrounding air, and thereby starves the fire of the oxygen it needs to burn.
There are six classes of fires to define the type of fire, and most importantly, the type of fire extinguisher to use to put out the fire. Here are the fire classes and the types of extinguishers you should use: Class A - Solids (wood, paper, plastic) require water, foam, dry powder, and wet chemical extinguishers. Class B - Flammable liquids (fuel, oil, paraffin) require foam, dry powder, and CO2 gas extinguishers. Class C - Flammable gasses (propane, methane, butane) require dry powder extinguishers. Class D - Burning metals (aluminum, magnesium, titanium) require dry powder (M28/L2) extinguishers. Class E - Electrical items require dry powder or CO2 gas extinguishers. Class F - Cooking oils and fats require wet chemical extinguishers.
Water removes heat by converting into steam and may reduce the heat below the ignition temperature of the fuel. It may also INCREASE the ignition temperature of the fuel itself by soaking in. Thus, the fuel cannot continue to burn until all the water has been converted to steam, which requires more heat.
Fire needs three things to burn: fuel, oxygen, and heat. Take away one or more of those three things in sufficient quantities, and the fire can no longer burn..A dry chemical fire extinguisher sprays a noncombustible, air resistant layer of foam designed to cover the fire's fuel source. When the fuel source (wood, oil, cloth, etc.) is completely and properly smothered, the expelled dry chemical foam isolates the fuel from the surrounding air, and thereby starves the fire of the oxygen it needs to burn.
True (You Need Heat, Fuel, and Combustible) ABC Extinguishers Cool down the fire breaking the fire triangle by removing the heat.