Foam agents also separate the oxygen element from the other elements. Water extinguishers are for Class A fires only; they should not be used on Class B or C fires. The discharge stream could spread the flammable liquid in a Class B fire or could create a shock hazard on a Class C fire.
Can a Class A extinguisher can be used to put out all types of fires?
Understanding fire extinguisher classes
There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Multipurpose extinguishers can be used on different types of fires and will be labeled with more than one class, like A-B, B-C or A-B-C.
What is a 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 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.
Which extinguisher is most appropriate for a Class C fire?
Powder extinguishers are a good multi-purpose fire extinguisher because they can be used on Class A, B and C fires.
How many times should you use a fire extinguisher?
You can use a fire extinguisher more than once, as long as it is not damaged or expired, but it must be recharged between uses. It is important to check the label of the fire extinguisher, so you know if the one you have is reusable or not.