Understanding How Fire Extinguishers Work

The video explains how fire extinguishers work by disrupting the fire triangle: heat, fuel, and oxygen. It covers three common types of extinguishers: water, which removes heat; gas, primarily carbon dioxide, which removes heat and oxygen; and dry chemical, which removes fuel. Each type is designed to tackle fires by targeting one of the essential elements needed for combustion.

What are the three essential elements needed for a fire to continue burning?

• Heat, light, and oxygen

• Heat, fuel, and water

• Fuel, oxygen, and heat

• Oxygen, water, and fuel

How do water extinguishers primarily extinguish a fire?

• By adding water vapor

• By removing heat

• By removing oxygen

• By removing fuel

What is the main component of gas extinguishers?

• Helium

• Oxygen

• Carbon dioxide

• Nitrogen

What is a unique feature of carbon dioxide in gas extinguishers?

• It is a liquid at room temperature

• It is flammable

• It is heavier than air

• It is lighter than air

How do dry chemical extinguishers stop a fire?

• By cooling the fire

• By cutting off the oxygen supply

• By forming a non-flammable layer over the fuel

• By adding moisture to the fire