The fire triangle consists of which three elements?

The fire triangle consists of which three elements?

• A. Heat, chemical reaction, fuel
• B. Heat, fuel, and oxygen
• C. Oxygen, nitrogen, fuel
• D. Fuel, oxygen, Lower Explosive Limit

Answer: (B)

The fire triangle shows three ingredients needed for combustion: heat, fuel, and oxygen. Heat provides the energy to start and sustain the reaction, fuel is the material that burns, and oxygen from the air supports the chemical reaction that releases heat and light. Remove any one of these, and the fire goes out—cool it to remove heat, remove the fuel, or limit the oxygen to smother the flames. The other options don’t fit because they either replace an essential element with a process (chemical reaction) or with something not required for combustion (nitrogen) or with a measurement (Lower Explosive Limit) rather than a component of the fire itself.

The fire triangle shows three ingredients needed for combustion: heat, fuel, and oxygen. Heat provides the energy to start and sustain the reaction, fuel is the material that burns, and oxygen from the air supports the chemical reaction that releases heat and light. Remove any one of these, and the fire goes out—cool it to remove heat, remove the fuel, or limit the oxygen to smother the flames. The other options don’t fit because they either replace an essential element with a process (chemical reaction) or with something not required for combustion (nitrogen) or with a measurement (Lower Explosive Limit) rather than a component of the fire itself.