class b fires use the following as fuel
Ordinary solid combustibles such as paper wood cloth and some plastics. A class-D fire extinguisher can be used to treat fires involving _____as fuel source.
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It is therefore very important to understand the four different classifications of fuel.
. Class B fires involve flammable liquids such as gasoline oil grease paint lacquer and solvents. Cooking fires that spark from grease lard olive oil butter animal fats and vegetable fats are recognized as Class K fires. Flammable liquids such as alcohol ether oil gasoline and grease which are best extinguished by smothering.
Also some special dry chemicals are used to quickly extinguish the flame and prevent reflash. Chemicals such as magnesium aluminum or potassium Class E fires electrical equipment. Larger models of these fire extinguishers are listed for Class A as well as Class B and Class C fires which makes them quite suitable for use on fires in electronic equipment.
Fires caused by combustion of liquids or materials that liquify such as petrol oils fats paints tar ether alcohol stearin and paraffin. Hydrogen butane methane ethylene. Lowering the temperature of the burning wood or paper.
Flammable liquids gases and solvents. Class B fires involve flammable and combustible liquids such as fuels paints solvents and grease. Lowering the temperature of the.
Class B fires contain flammable liquids which burn at room temperature and combustible liquids which require heat in order to ignite. Gasoline oil grease acetone. Class B Fires.
Cooking Oils and Fats. Smothering the burning liquid. There are four classes of fires.
Lithium potassium magnesium titanium zirconium. Firefighting Attack Cooling B. Flammable Liquids andor Gases The next fire type you need to be aware of is the ones started by flammable liquids.
Following establishment of fire boundaries 5. Any of the following may be the fuel source for a Class B fire. QUESTION 1 Class B fires involve which of the following fuels.
Commercial buildings and restaurants built with kitchens should be alert to the possibility of Class K fires. Class B fires flammable liquids. Fires involving solid combustible materials such as wood textiles straw paper coal etc.
A Class B fire is best extinguished by. These fires are dangerous as they can happen anywhere these liquids are used or stored. Gasoline or diesel fuel Propane Butane Methane Acetone Acetylene These materials are typically found in lacquers solvents oils and oil-based paints.
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. Class C fires are electrical fires. Grease can also serve as fuel for a Class B fire.
Class C fires involve electrical equipment such as wiring fuse boxes energized electronics motors appliances computers and other electrical sources. Knowledge application - use your knowledge to answer a question about the fuel of Class D and Class B fires. Operate the extinguisher and it stands for which of the following.
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 include gasoline diesel fuel oils tars petroleum greases solvents alcohols and oil-based paints. Class A fires are usually fought with water which cools and dampens the fuel.
Electrical equipment appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury. Residential homes should also be aware that a Class K fire can spark on the stovetop oven or grill especially if grease splatters. Metals magnesium and sodium.
This class has a high fire hazard in which water may not extinguish a fire. Discharge the fixed CO2 system into the engine room. Wood paper cloth rubber trash and plastics.
Use a Class C or Class ABC fire extinguisher on these types of fires. Fire Class Icon Fire Class Type of Fire Fuel. Heating wire inner and OL L Fuel Inlet Diffusser AirAqent Inlet L Heater terminal Figure 1.
Some examples include oils petroleum grease tar solvents oil-based paints alcohols and flammable gases. They are the fuel source in the fire triangle fuel heat oxygen chemical reaction. When water is placed on grease it creates steam which expands rapidly and splatters causing burns and spreading the fire.
Carbon dioxide or CO2 extinguishers are an example of class B and C extinguishers. Class B - Flammable liquids. Class A - Wood paper cloth trash plastics.
These include alcohols oil gasoline and paint. O Use a Class B or Class ABC fire extinguisher. CLASS B Fires These fires are burning flammable liquids such as gasoline greases hydraulic oil.
Creating a chain reaction between the molecules of the burning material. Any non-metal in a liquid state on fire. Extension cords space heaters toasters hair dryers.
Because of this Class A fire extinguishers use. Combustible metals When operating a fire extinguisher remember the mnemonic PASSPASS represents the steps used to properly. Once the electrical item is removed the fire changes class Class F fires.
It may spread the flames. As alluded to above Class B fires are ones in which flammable liquids andor gases become involved. Test yourself with the worksheet and try to practice the following skills.
Like LPG hydrogen butane or methane Class D fires combustible metals. The fuel for a Class B is a combustible gas or liquid. Firefighting Class B A A class B fire is most successfully fought by.
O Do not use a Class A extinguisher on this type of fire. Flammable and Combustible Gases. Such as petrol turpentine or paint Class C fires flammable gases.
Remove fuel B If you have a fire in the engine room your FIRST act should be to _____. When discharged these agents are in the combined form of a gasmist or a liquid which rapidly evaporates after discharge with about twice the range of carbon dioxide. Solid combustible materials that are not metals.
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