Question: Which extinguisher Cannot be used in extinguishing fire class B?

This acts to blanket the fire and suffocate it. Powder extinguishers are effective for class A, B and C fires, since it is not an electrical conductor and since it can effectively break the chain reaction in a liquid or gas fire, something a water extinguisher cannot do.

Which fire extinguisher should not be used to extinguish Class B?

Flammable gases include things like propane, hydrogen, and butane. 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.

What type of fire extinguisher is used for Class B?

The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials. Fire extinguishers with a Class B rating are effective against flammable liquid fires.

What are Class B fire extinguishers used for?

Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering. Class C: Electrical equipment, appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury from electrical shock.

How is Class B fire extinguished?

Class B fires involve flammable liquids like oil, alcohol, or gasoline. … Class B fires should be extinguished using foam, powder, or carbon dioxide extinguishers, according to the Fire Equipment Manufacturer’s Association. These types of extinguishers work by cutting off a fire’s oxygen supply.

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Where should a Class B fire extinguisher be placed?

1. Where should fire extinguishers be located?

  • Class A: Locations that contain ordinary combustible materials, including offices, classrooms, and assembly halls.
  • Class B: Workshops, storage areas, garages, warehouses, or service and manufacturing areas that contain flammable liquids or gasses.

What does the letter B on a B 1 fire extinguisher indicate?

Answer: The letter “b” indicates it is effective against flammable liquid fires.

What are Class B and C fires?

What types of fires can be extinguished with carbon dioxide (CO2) fire extinguishers? Class B fires which involve flammable liquids and gases, solvents, oils, greases (excluding cooking oils/greases in depth) tars, oil-based paints and lacquers. Class C fires which involve energized electrical equipment.

What is the difference between ABC and CO2 fire extinguisher?

CO2s are designed for Class B and C (flammable liquid and electrical) fires only. Carbon Dioxide is a non-flammable gas that extinguishes fire by displacing oxygen, or taking away the oxygen element of the fire triangle.

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