How do you use a Class A fire extinguisher?

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.

How does a Class A fire extinguisher work?

To achieve a Class “A” rating, the extinguisher must be capable of putting out the wood crib, wood panel and excelsior (shredded paper) tests. Ratings are based on the size of the material that can be repeatedly extinguished. To achieve a class “B” rating, the extinguisher must repeatedly put out a flaming liquid fire.

What are the 4 steps in using a fire extinguisher?

The acronym PASS is used to describe these four basic steps.

  • Pull (Pin) Pull pin at the top of the extinguisher, breaking the seal. …
  • Aim. Approach the fire standing at a safe distance. …
  • Squeeze. Squeeze the handles together to discharge the extinguishing agent inside. …
  • Sweep.
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How do you extinguish a Class A?

Luckily, Class A fires are the easiest type to extinguish. The Fire Equipment Manufacturer’s Association recommended using a water or foam fire extinguisher on Class A fires. You can also use water to douse the fire, as it can remove the fire’s heat supply.

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 fire extinguisher do I need for a Class A fire?

Multipurpose Dry Chemical: Multipurpose dry chemical fire extinguishers are effective for Class A fires, as well as Classes B and C. The agent in these types interrupts the chemical reaction in the Fire Triangle (fuel, oxygen, heat plus a chemical reaction) to extinguish a Class A fire.

How do you know what class a fire extinguisher is?

Most fire extinguishers will have a pictograph label telling you which classifications of fire the extinguisher is designed to fight. For example, a simple water extinguisher might have a label like the one below, indicating that it should only be used on Class A fires. Solid combustible materials that are not metals.

Which 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.

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What is the first thing to do in a fire?

Activate the first fire alarm you see and try to help others to evacuate the building. Close doors behind you to help prevent the fire from spreading. Follow the evacuation procedure if you’re at your workplace or follow the escape route signs if you’re a visitor. Listen to instructions given by the Fire Marshal.

Which part of fire extinguisher should pull first to unlock it?

For an easy-to-remember 4-step process to operating a fire extinguisher, learn the PASS system: Pull the pin while holding the extinguisher away from you to unlock the mechanism. Aim low toward the base of the fire. Squeeze the lever slowly.

Tame a raging fire