Definition – What does Fire Extinguisher mean. A fire extinguisher is a device used to stop the chemical chain reaction of fire by either cooling removing oxygen or prohibiting the reaction itself.
Two commonly used chemicals are effective in fighting these types of fires.
What does fire extinguisher mean in chemistry. These are kept handy at places namely fire points in buildings factories public paces or transportation. There are other kinds of fire extinguishers that use potassium acetate based agent which is discharged from the extinguisher as a fine mist that. A device containing water or a special gas powder or foam a mass of small bubbles that is put onto a fire to stop it from burning PhanuwatNandeeiStock Getty Images PlusGettyImages SMART Vocabulary.
Below is a useful chart from Buckeye Fire. These types of extinguishers also have no numerical rating nor are they given a multipurpose rating – they are designed for class D fires only. B LIQUIDS Fire extinguishers with a Class B rating are effective against flammable liquid fires.
They can be hand held wheeled or part of. Water fire extinguishers work by removing the heat source from the fire. They are for fires that involve combustible metals such as magnesium titanium potassium and sodium.
If an extinguisher is described as safe to use on fires involving live electricity it means the suppressant is not inherently electrically conductive so you. These can be fires where cooking liquids oil gasoline kerosene or paint have become ignited. As you work on the fire extinguisher someone should dial 9-1-1 for you and someone else should go get another extinguisher if one is available.
These numbers are a ULULC rating that indicates the amount of firefighting capacity with the square feet covered for the type of fire. Class D fire extinguishers are commonly found in a chemical laboratory. The most common fire extinguisher is the ABC dry chemical type which requires recharging and internal inspection 6 years after the manufacture date and hydrostatic testing 12 years after the manufacture date.
You can never use too many extinguishers on one fire particularly considering the average extinguisher will only contain thirty seconds to a minutes worth of suppressant. C could extinguish Class A Class B and Class C firesif its big enough to tackle the blaze. 10 BC extinguisher means 25 gallons of water firefighting capacity for 10 square feet covered for a BC Type fire.
Related words and phrases. Dry chemical extinguishers are useful for either class ABC or class BC fires check the label and are your best all around choice for common fire situations. Some fires require extremely specific care and among these are Class D fires which are caused by combustible metals like magnesium.
Thats where numbers come in. Its even effective on A and B fires although much more so on B and C than on A. For example an extinguisher marked 1 A 1 B.
Extinguisher refers to the amount of water the fire extinguisher holds and the amount of fire it will extinguish. Class B Extinguishers should be used on fires involving. They have an advantage over CO 2 and clean agent extinguishers in that they leave a blanket of non-flammable material on the extinguished material which reduces the likelihood of reignition.
The most common type of extinguisher a dry chemical-based one is ideal for fighting electrical fires. Fire extinguishers are portable devices used to extinguish small fires or reduce their destruction before firefighters arrive at the scene. The letters on a fire extinguishers label indicate which classes of fire it can effectively fight.
Fire extinguishers contain different chemicals depending on the application. Handheld extinguishers which are commonly sold at hardware stores for use in. The cooling action of the water slows down the burning until the flames are extinguished.