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Fire Officer Strategy And Tactics Practice Test

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The Fire Tetrahedron adds which element to the Fire Triangle?
Correct Answer:
Chemical reaction
Explanation:
Fire requires four things to burn: heat, fuel, oxygen, and the chemical chain reactions that sustain the flame. The Fire Triangle includes heat, fuel, and oxygen. The Fire Tetrahedron adds the chemical reaction—the ongoing chain reactions at the flame front that keep the flame going and continuously release heat and light. If you suppress or interrupt those chemical reactions, the flame can’t continue even if heat, fuel, and oxygen are present. That’s why the correct answer is the chemical reaction. The other options are already part of the original triangle and aren’t the added factor in the tetrahedron.

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