What are the three elements of the fire triangle? (Choose three.)

Question

Options

• AFuel
• BHeat
• CSmoke
• DOxygen
• ENitrogen

• A
  76% (29)
• B
  11% (4)
• C
  3% (1)
• D
  8% (3)
• E
  3% (1)

Explanation

Fuel (A), Heat (B), and Oxygen (D) form the fire triangle - the three conditions that must all be present simultaneously for combustion to occur. Remove any one of them and fire cannot start or will be extinguished, which is the basis for all firefighting strategies.

Why the distractors are wrong: Smoke (C) is a byproduct of combustion, not a requirement for it - fire produces smoke, smoke does not produce fire. Nitrogen (E) is actually the opposite of helpful to fire; it's an inert gas used in some fire suppression systems precisely because it displaces oxygen.

Memory tip: Think of the triangle shape itself - three sides, three elements. The acronym FOH (Fuel, Oxygen, Heat) or the phrase "Fire Needs HOF" (Heat, Oxygen, Fuel) can help you recall all three without confusing them with smoke or other combustion byproducts.

Note: The question says "Choose three," so the full correct answer set is A, B, and D - your answer key listing only "A" appears to be truncated.

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