Practice question

What are the three main components of the fire triangle?

  1. Water, carbon, and heat
  2. Heat, fuel, and oxygen
  3. Flame, smoke, and heat
  4. Fuel, flame, and pressure

Answer: B — Heat, fuel, and oxygen

The three main components of the fire triangle are heat, fuel, and oxygen. These components represent the essential elements needed for a fire to start and sustain itself. Heat refers to the energy source that raises the material to its ignition temperature. Fuel is any combustible material—solid, liquid, or gas—that can burn. Oxygen is necessary for combustion to occur; it typically comes from the air we breathe, which contains approximately 21% oxygen. When all three components are present in the right conditions, a fire can occur. If any one of these elements is removed, the fire will be extinguished. This understanding of the fire triangle is fundamental for fire prevention and response strategies, helping individuals to recognize how to effectively manage and combat fire hazards.

Practice more: Ontario Office of the Fire Marshal (OFM) Hazmat Awareness and Operations Certification Practice Exam →