What does class A fire extinguisher contain?

Fire extinguishers with a Class A rating are effective against fires involving paper, wood, textiles, and plastics. The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials.

What is inside a Class A fire extinguisher?

Agents which are effective at fighting Class A fires include water, chemical foam, and dry chemicals often contained in class A or multi-purpose fire extinguishers. … Dry chemicals and halotron stop the chemical reaction needed to convert fuel into a usable, gaseous form to feed the fire.

What are Class A 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.

What are the 3 methods of extinguishing a fire?

All fires can be extinguished by cooling, smothering, starving or by interrupting the combustion process to extinguish the fire. One of the most common methods of extinguishing a fire is by cooling with water.

What are the 5 classes of fire extinguishers?

What are the 5 Types of Fire Extinguishers?

  • Class A Fire Extinguishers. Class A fire extinguishers are safe for use on ordinary combustible fires, like those fueled by paper or wood. …
  • Class B Fire Extinguishers. …
  • Class C Fire Extinguishers. …
  • Class D Fire Extinguishers. …
  • Class K Fire Extinguishers.
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What element does not need to be present for fire to exist?

Oxygen, heat, and fuel are frequently referred to as the “fire triangle.” Add in the fourth element, the chemical reaction, and you actually have a fire “tetrahedron.” The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.

Which of the following is required to start a Class A fire?

Class A. Class A fires are defined as ordinary combustibles. These types are fires use commonly flammable material as their fuel source. Wood, fabric, paper, trash ,and plastics are common sources of Class A fires.

Tame a raging fire