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.
What kind of fires can a fire extinguisher put out?
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.
Do fire extinguishers work on all fires?
However, most do not realize that a single fire extinguisher does not work on all types of fire. There are many different types, or classes, of fire extinguishers just as there are many different classes of fire.
How big of a fire can an extinguisher put out?
All extinguishers are rated as to the size of fire they are designed to handle. The rating is a number from 1 to 40 for a “Class A” fire, and 1 to 640 for a “Class B” fire. For example, a 20-B rated extinguisher can handle a flammable liquid fire twice as big as a 10-B extinguisher; the rating will appear on the label.
Which Cannot be used as fire extinguisher to put out?
Water cannot be used as fire extinguisher to put out burning oils like petrol, they are much lighter than water and the water vaporizes in to the stream which expands causing it to spit out the oil, making the flame much bigger.
What is the best defense against fire?
As always, the best defense against a fire is to be prepared. Take a moment to look at your fire extinguisher.
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 is the main cause of death in fire?
The characteristic biphasic distribution of carboxyhemoglobin in fire victims together with other observations suggest that the principal causes of death are carbon monoxide followed by carbon dioxide poisoning and/or oxygen deficiency, while the influence of heat is considered to be of minor importance.
Can you use water fire extinguisher on flammable liquids?
Water extinguishers are mostly used for class A fire risk. In most premises, it is necessary to have either foam or water extinguishers. … It should not be used for kitchen fires, fires caused by flammable gas and liquids as well as fires that involve electrical equipment.
What does 2A 10BC mean?
A fire extinguisher that is rated 2A:10 BC means it has a fire fighting capacity equivalent to: 2.5 Gallons of Water and 10 Square Feet for a BC Type Fire.
What is the difference between 5BC and 10BC fire extinguisher?
In our tests, the 10BC units discharged only a fraction of a second longer than the 5BC, hardly “twice” anything. The 10BC, on average, discharged only 25% more fire suppressant than the 5BC.