class b fires use the following as fuel
Water will remove oxygen and the heat source to the fire stopping it in its tracks. Most of these liquids have a high carbon content and the compounds in them and are highly.
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These materials are typically found in lacquers solvents oils and oil-based paints.
. But this classification typically does not include fires involving cooking oils or grease. Ordinary solid combustibles such as paper wood cloth and some plastics. That normally do not leave any embers or residues or very low amounts of residues.
Class B fires involve flammable and combustible liquids such as gasoline alcohol oil-based paints lacquers. Class B Fires. Drawing courtesy of Mark Robin Great Lakes Chemical Corp DATA AND ANALYSIS Cup-burner extinguishing concentration data are given in Table 1 for the two the HFC hydrofluoro-carbon agents HFC-227ea and HFC-23 and 34 Class B fuels.
Smothering the burning liquid. The fuel sources of class B fires gases and liquids can be quite volatile and cannot be extinguished by water which will only make the fuel source spread thus spreading the fire. If you have any of these materials in use or storage then you should have the proper fire extinguishers available to.
Class B Fires. Fires that involve energized electrical equipment. Solid combustible materials that are not metals.
The next fire type you need to be aware of is the ones started by flammable liquids. Class B fires flammable liquids. It is therefore very important to understand the four different classifications of fuel.
Lowering the temperature of the burning wood or paper. Class A - Wood paper cloth trash plastics. Class B fire extinguishers contain a special dry chemical powder typically monoammonium.
Extension cords space heaters toasters hair dryers. August 12 2013 in Encapsulator Agent. Metals magnesium and sodium.
There are four classes of fires. Class B fire refers to a fire involving flammable liquids such as petroleum gasoline kerosene petrol diesel octane etc paint alcohol solvent oil and tar etc. A class B fire is best extinguished by a lowering the temperature of the burning wood or paper b wetting the burning paper or wood c smothering the burning liquid d lowering the temperature of the burning liquid e creating a chain reaction between the molecules of the burning material.
Heating wire inner and OL L Fuel Inlet Diffusser AirAqent Inlet L Heater terminal Figure 1. ABC extinguishers are usually dry chemical. Lithium potassium magnesium titanium zirconium.
This is because Class B fires typically have a fuel with a lower density than water causing it to rise and burning grease is hotter than the boiling point of water 212 degrees Fahrenheit or 100 degrees Celsius. Flammable liquids gases and solvents. Flammable Liquids andor Gases.
Class B combustible. For Class A fires it is mixed with water at ½ to 1 and for Class B Class D fires and hydrocarbon spills 3. Any non-metal in a liquid state on fire.
Flammable liquids such as gasoline and lighter fluid are the causes of Class B fires and should never have water used on them due to the potential increase of the chemical reaction that fuels this type of fire and the potential splashing of the fuel itself. Cooking Oils and Fats. Like LPG hydrogen butane or methane Class D fires combustible metals.
Class B - Flammable liquids. QUESTION 1 Class B fires involve which of the following fuels. These fires are ones that can be handled with water.
Chemicals such as magnesium aluminum or potassium Class E fires electrical equipment. Creating a chain reaction between the molecules of the burning material. If you are a firefighter or are involved in spill control you should seriously look into F-500 Encapsulator Agent.
Gasoline or diesel fuel. Question 1 7 out of 7 points Class B fires involve which of the following fuels. NCERT Solutions for Class 7th English Chapter 8 Fire Friend and Foe.
Fires in combustible metals such as magnesium titanium zirconium sodium lithium and potassium. Combustible liquids and gases can fuel Class B fires. Class A fires involve ordinary combustible materials such as cloth wood paper rubber and many plastics.
Flammable liquids such as alcohol ether oil gasoline and grease which are best extinguished by smothering. Once the electrical item is removed the fire changes class Class F fires. Gasoline oil grease acetone.
When water is placed on grease it creates steam which expands rapidly and splatters causing burns and spreading the fire. Electrical equipment appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury. One Firefighting Agent for Class A B and D Fires and Fuel Spills.
ABC extinguishers can extinguish class A fires solid fuels like paper and wood Class B fires involving liquid fuels such as oil and grease and Class C fires which are class A and B fires that also involve electricity. Such as petrol turpentine or paint Class C fires flammable gases. Any of the following may be the fuel source for a Class B fire.
Note that in Europe and Australia Class B is for beverages and Class C for gases. Flammable liquids gases and solvents. Extinguishers with an A rating are designed to extinguish fires involving these ordinary combustible materials.
Hydrogen butane methane ethylene. Flammable and Combustible Gases. Flammable liquids gases and solvents.
Using a water or foam fire extinguisher will be just the thing to put it out. According to the US Fire Administration Class B fires involve ignitable liquids or gases like petroleum grease alcohol paint propane or gasoline. Fires in flammable liquids combustible liquids petroleum greases tars oils oil-based paints solvents lacquers alcohols and flammable gases.
That is why it is important only to use extinguishing agents and methods designed specifically for Class B fires. C Fire is the result of chemical reaction. Do not use water to put out a Class B fire as it will just spread the fire.
Because of this Class A fire extinguishers use. Wood paper cloth rubber trash and plastics. Grease can also serve as fuel for a Class B fire.
A Class B fire is best extinguished by. Lowering the temperature of the.
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