Class A. Class A fires involve ordinary combustible materials, such as cloth, wood, paper, rubber, and many plastics. Extinguishers with an A rating are designed to extinguish fires involving these ordinary combustible materials.
What is the best extinguisher for a Class A fire?
Dry chemical fire extinguisher: Dry chemical extinguishers extinguish the fire by interrupting the chemical reaction of the fire triangle. They’re most effective on Class A, B and C fires. CO2 fire extinguisher: Carbon dioxide extinguishers take away the oxygen element of the fire triangle.
Can you use a Class A fire extinguisher on any fire?
Foam fire extinguishers are suitable for class A and the flammable liquids of class B, though not effective for gaseous fires. … Foam extinguishers are some of the best for liquid fires, such as gasoline fires, but can also be used on Class A fires involving solid combustibles like wood.
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 4 ways to extinguish a fire?
Control measure knowledge
- The fire tetrahedron identifies the four components needed for burning to take place. …
- All fires can be extinguished by cooling, smothering, starving or by interrupting the combustion process to extinguish the fire.
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.
How do you fight a Class A fire?
Fighting Class A Fires
Heat can be eliminated by dousing the flames with water, or the supply of oxygen can be prevented by smothering the fire with foam from a fire extinguisher. In some cases, such as forest fires, the fuel is often physically removed in order to stop the fire from spreading.
What is Class A fire hazard?
Class A—fires involving ordinary combustibles, such as paper, trash, some plastics, wood and cloth. A rule of thumb is if it leaves an ash behind, it is a Class A fire. Class B—fires involving flammable gases or liquids, such as propane, oil. and gasoline. Class C—fires involving energized electrical components.
What do you use for a Class A fire?
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.