What are the 3 ways to extinguish a fire?

Answer 1

First you need to look at the fire triangle. In the fire triangle (consisting of heat, fuel, air) the firefighter removes one of the sides of the triangle, thus extinguishing the fire. There is also the fire tetrahedron which has the addition of a chemical chain reaction. The most common way to put out a fire is with water. This cools the fire and then also helps to remove the air with the expansion of the water into steam. Some departments use a wetting agent, or foam, added to the water. This helps to remove the fuel and air from the equation. Lastly, depending on the fire, a chemical is used that helps to disrupt the amount of air the fire has to burn and smothers it. This could be a dry chemical from and extinguisher or even a gas from a CO2 extinguisher.