Film-forming foam type. AFFF (aqueous film-forming foam) and FFFP (film-forming fluoroprotein) fire extinguishers are rated for use on both Class A and Class B fires. As the name implies, they discharge a foam material rather than a liquid or powder. They are not suitable for use in freezing temperatures.
Dry chemicals, like ammonium phosphate or pressurized carbon dioxide are effective means to extinguish a Class B fire. Never attempt to …
Classes of Fires & Fire Extinguishers – UCLA Health
Classes of Fires. There are four classes of fires: Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. 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 …
CO2: A carbon dioxide fire extinguisher works on a Class B fire by expelling CO2 to suffocate the fire, removing the oxygen necessary to keep it burning. It also helps with removing the heat, as the discharge is very cold.
People Also Ask what is the most effective extinguishment of class b fires
What chemicals are used to extinguish a Class B fire?
Dry chemicals, like ammonium phosphate or pressurized carbon dioxide are effective means to extinguish a Class B fire. Never attempt to extinguish a Class B fire with water.
Why are Class B fires so difficult to extinguish?
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. That is why it is important only to use extinguishing agents and methods designed specifically for Class B fires.
What are the different classes of fire extinguishers?
1 Classes of Fires. Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. … 2 Fire Extinguishers. Fire extinguishers are classified as types A, ABC, BC or K. … 3 PASS. To request fire extinguisher training for your department, please contact Ambulatory Safety.
How do you extinguish a Class C fire?
Extinguish a Class C fire by shutting off the electrical power, which serves as the fuel source for the electrical fire. Non-conductive chemicals like carbon dioxide should also be used to suppress the flames.
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How To Extinguish a Fire (Class A and B) Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher