FDNY Fire Life & Safety Director Practice Test

The fire triangle consists of three essential components: heat, fuel, and oxygen. Each of these elements plays a crucial role in the fire ignition and combustion process.

Heat is necessary to raise the temperature of the fuel to its ignition point, allowing it to burn. Fuel is any combustible material—solid, liquid, or gas—that can be consumed in a fire. Oxygen, typically sourced from the air, supports the chemical reactions that occur when the fuel ignites.

Without any one of these three components, a fire cannot start or be sustained. This is why understanding the fire triangle is critical for fire prevention and safety, as removing any of these elements can effectively extinguish a fire or prevent it from starting.