Question

Explain the working of a fire extinguisher

Answer 1

Answer:

Explanation:

At the top of the cylinder, there is a smaller cylindrical container filled with compressed gas. A release valve acts as a locking mechanism and prevents this gas from escaping. When you pull the safety pin and squeeze the lever, the lever pushes on an actuating rod that presses the valve down to open a passage to the nozzle. The compressed gas is released, applying a downward pressure on the fire-extinguishing material, and pushing it out the nozzle under tremendous force.

Although the temptation is to aim the extinguishing material at the flames, the proper way is to aim it directly at the fuel.

Answer 2

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Water extinguishers work by removing heat from the fire.

Dry chemical extinguishers are tanks of foam or dry powder with compressed nitrogen as the propellant.

They work by smothering the fire:-

When you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out.

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