Certified Safety Professional Exam 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer identifies the four components of the fire tetrahedron as fuel, heat, oxygen, and the chemical chain reaction. This model extends the traditional fire triangle, which consisted of only fuel, heat, and oxygen, by including the chemical chain reaction that occurs during combustion.

Each component plays a crucial role in the fire process:

- **Fuel**: This is any combustible material, solid, liquid, or gas, that can burn in the presence of heat and oxygen.

- **Heat**: This is the energy source that raises the temperature of the fuel to its ignition point, allowing combustion to occur.

- **Oxygen**: This component is essential for maintaining a fire, as most combustion reactions require oxidizers to proceed.

- **Chemical chain reaction**: This refers to the ongoing process that allows the fire to propagate. For a fire to continue burning, the heat produced must be enough to ignite additional fuel, which releases more heat and maintains the reaction cycle.

Understanding these four components is vital for fire prevention and control strategies, as targeting any one of them can effectively extinguish a fire.