1) Water extinguishers work mainly by cooling (removing heat), but a dense spray of water droplets also helps to cut off oxygen. 2) Dry powder …
PASS Step 2: AIM the nozzle, horse, or hose. Aim the nozzle, horn, or hose of the fire extinguisher at the base of the fire (this means the bottom, where the stuff that’s burning is located). A common mistake is to aim into the flames. This won’t put out the fire.
How Does A Fire Extinguisher Put Out A Fire?
The most common types of fire extinguishers are pressurized with either carbon dioxide or nitrogen, to propel an active material towards the fire. This active ingredient can be potassium bicarbonate in the form of a powder, water, or an evaporating fluorocarbon agent. While many people believe that the physical smothering of the fire is what extinguishes it, the truth is that …
Fire extinguishers are rated by the type of fire they can put out. Class A extinguishers can put out fires from "ordinary combustibles" such as wood, plastic or paper. Class B can put out burning liquids such as gasoline or …
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How do fire extinguishers work?
Fire extinguishers are sturdy metal cylinders filled with water or a smothering material. When you depress a lever at the top of the cylinder, the material is expelled by high pressure, similar to the way material is forced out of an aerosol can. The diagram below shows a typical design. This content is not compatible on this device.
Can a water extinguisher put out a fire?
But it can be dangerous in the wrong situation. A water extinguisher can put out things like burning wood, paper or cardboard, but it does not work well on electrical fires or fires involving inflammable liquids. In an electrical fire, the water may conduct the current, which can electrocute you.
How do you use a fire extinguisher correctly?
The proper way to use the extinguisher is to aim it directly at the fuel, rather than the flames themselves, and move the stream with a sweeping motion. In the next section, we’ll look at the major types of extinguishers. Water is the most familiar extinguishing material, and it is one of the most effective.
What can a Class A fire extinguisher put out?
Class A extinguishers can put out fires from "ordinary combustibles" such as wood, plastic or paper. Class B can put out burning liquids such as gasoline or grease. Class C can put out electrical fires. Extinguishers marked A, B and C can put out all types.
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TYPES OF FIRE AND FIRE EXTINGUISHERS | WHICH FIRE EXTINGUISHER TO BE USED ON WHICH CLASSES OF FIRE Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher