What are the components of the fire triangle?

What are the components of the fire triangle?

• A. Heat, oxygen, fuel
• B. Water, heat, fuel
• C. Oxygen, water, smoke
• D. Heat, oxygen, pressure

Answer: (A)

The fire triangle centers on three elements that must be present for a fire to start and continue: heat to reach ignition and keep the reaction going, oxygen to support the combustion, and a fuel source to feed the flame. If any one of these is removed, the fire cannot sustain itself. For example, applying water lowers the heat, starving the fire; removing the fuel stops the flame once the remaining heat is used up; cutting off the oxygen starves the reaction. The other options mix in things that aren’t part of the basic triangle—water is a cooling agent, smoke is a byproduct, and pressure isn’t a defining element of what keeps a fire alive. (Note: some models add a fourth factor—the chemical chain reaction—to form the fire tetrahedron, but the classic triangle is heat, oxygen, and fuel.)