how do dry chemical extinguishers put out a fire?

Answer 1

Most dry chemicals put out the fire by "blanketing" the area and creating a physical barrier between the fuel and the oxygen.

(Fires need fuel, heat, and oxygen to start the chemical reaction we call fire.)

Class A dry chemical, also known as ABC chemical and multipurpose dry chemical, is usually comprised of monoamounium phosphate. The class A chemical, although mildly corrosive, will actually adhere to the burning surfaces of fuel, such as a tire fire or a pile of trash.

Class B chemicals, usually, sodium bicarbonate (also known as baking soda) will blanket a flammable liquid or grease fire nicely, but doesn't work so hot on class A materials, thus it doesn't receive a class A rating.

There are other dry chemical and dry powder agents. Purple K, Class D Met-L-X, and a few other class A variants.

To learn more about fire extinguishers, how they work, and the classes of fire, visit the following link...

Answer 2

Carbon dioxide , CO2 is used to place out fires by making use of combating the oxygen. Baking soda may be used to create the CO2 What style of fire? chemical? electric? combating the oxygen, cooling the fire or removing the gas will placed out a hearth. be careful, even fire extinguishers do not placed out fires that are very large. They artwork for purely a jiffy. Water is barely used on paper/timber type fires. it is going to unfold an oil fire and habit with an electric fire. what's the area the place there at the instant are not any water mains or fire extinguishers?

Answer 3

They smother a fire by preventing oxygen from getting to the base of the fire, by using chemicals that are inside of it. More like a white powder.

Answer 4

They remove oxygen or block access to oxygen. Fire needs oxygen.

Answer 5

I'm not an expert but I think it's depriving the fire of oxygen, suffocating it, if you will.

Answer 6

blocking oxygen