What is a fire triangle ?

Combination of Oxygen, Fuel and Heat

Combination of Heat, Gas and CO₂

Combination of Fuel, CO₂ and Heat

None of the above

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This question was previously asked in

UPSC CISF-AC-EXE – 2017

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The correct answer is A) Combination of Oxygen, Fuel and Heat.

The fire triangle is a simple model illustrating the three elements necessary for most fires to ignite and continue to burn: Fuel (something to burn), Oxygen (a supply of oxidizer, usually air), and Heat (sufficient to raise the fuel to its ignition temperature). Removing any one of these elements can extinguish the fire.

A more complex model, the fire tetrahedron, adds a fourth element: a chemical chain reaction. This is particularly relevant for understanding how certain extinguishing agents (like halons) work by interrupting this reaction. However, the fundamental fire triangle remains a widely used and accurate model for basic understanding.

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