Foam: These extinguishers work on both Class A and B fires. The foam agent works on Class B fires by separating the fuel and the oxygen by creating a seal on the surface of the flammable liquid. However, these extinguishers will only be effective when the flammable liquid is not free-flowing.
TYPE A — Class A extinguishers are for use on fires that contain ordinary combustibles such as paper, wood, cloth, plastics, etc. TYPE B — Class B extinguishers are for use on fires containing flammable liquids like oil, gasoline, etc.
What is Class B Fire Extinguisher Used For?
How to fight a Class B fire. Do not use water to fight a Class A fire, and water will often spread the fuel and cause more fire. You must cut off oxygen to extinguish a Class A fire. To stop the flames from igniting, you can use carbon dioxide gas. You can also use bicarbonate (baking soda) or potassium carbonate to prevent the fire from igniting.
Dry Chemical Fire Extinguishers. The standard dry powder extinguishers can be used for class A, class B and class C fires. This type of fire extinguisher is usually used for fires caused by various organic materials including wood, coal, textiles, fabrics, cardboard and paper.
People Also Ask when to use a class b fire extinguisher
What extinguisher can be used for Class B?
What are the most common causes of fire in the workplace?Faulty Electrics. Faulty electrics are the biggest cause of workplace fires, loose wires, plugs that are over loaded and old equipment can all make for a potential death trap.Flammable and Combustible Materials.Human Error.General Negligence.Arson.
How should a Class B fire be extinguished?
Gasoline and dieselEthanol and methanolIsopropanolAcetoneAcetyleneMethaneButanePropane
What are Class B fire extinguishers are best for what?
Durable metal headGood perfomance and Easy to useMount, bracket and strap are includedIdeal for flammable liquid and electrical fires
Which extinguisher is a Class A B and C type?
There are two types: multi-purpose (Class A, B, and C) and ordinary dry chemical extinguishers (Class B and C). Works For: Class A, B and C fires. Water Mist. This extinguisher is designed to remove the heat of the fire only by supplying a dense water mist. This is a general-purpose type fire extinguisher that is well suited for dealing with small fires and protecting nearby people from heat burns. Works For: Class A and C fires. Clean Agent
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Class B Fire Extinguisher training #2 Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher