Question

8. The most commonly used fire extinguisher it's.
ans.

The basic structural and functional unit of all it
living organisme is:
ans.​

Answer 1

Not all fires are the same, and they are classified according to the type of fuel that

is burning. If you use the wrong type of fire extinguisher on the wrong class of fire,

you can, in fact, make matters worse. It is therefore very important to understand

the four different fire classifications.

Class A - Wood, paper, cloth, trash, plastics

Solid combustible materials that are not metals. (Class

A fires generally leave an Ash.)

Class B - Flammable liquids: gasoline, oil, grease,

acetone

Any non-metal in a liquid state, on fire. This

classification also includes flammable gases. (Class B

fires generally involve materials that Boil or Bubble.)

Class C - Electrical: energized electrical equipment

As long as it's "plugged in," it would be considered a

class C fire. (Class C fires generally deal with

electrical Current.)

Class D - Metals: potassium, sodium, aluminum,

magnesium

Unless you work in a laboratory or in an industry that

uses these materials, it is unlikely you'll have to deal

with a Class D fire. It takes special extinguishing

agents (Metal-X, foam) to fight such a fire.

Most fire extinguishers will have a pictograph label telling you which classifications of fire

the extinguisher is designed to fight. For example, a simple water extinguisher might

have a label like the one below, indicating that it should only be used on Class A fires.The Fire Triangle

In order to understand how fire extinguishers work, you first need to know a little

bit about fire.

Four things must be present at the same time in order to produce

fire:

1. Enough oxygen to sustain combustion,

2. Enough heat to raise the material to its ignition temperature,

3. Some sort of fuel or combustible material, and

4. The chemical, exothermic reaction that is fire.

Oxygen, heat, and fuel are frequently referred to as the "fire triangle.Oxygen, heat, and fuel are frequently referred to as the "fire triangle." Add in the fourth

element, the chemical reaction, and you actually have a fire "tetrahedron." The important

thing to remember is: take any of these four things away, and you will not have a fire

or the fire will be extinguished.

Essentially, fire extinguishers put out fire by taking away one or more elements of

the fire triangle/tetrahedron.

Fire safety, at its most basic, is based upon the principle of keeping fuel sources and ignition sources separate.

Answer 2

Answer:

1.:- when fire happen then we will call to fire extinguisher

Explanation:

cell is the basis structural and functional unit of living organisms