Jeppesen Powerplant Orals Practice Exam: Prep & Study Guide

For a fire to ignite and sustain itself, three key elements must be present: fuel, oxygen, and a source of ignition.

Fuel is the material that burns, which can include solids, liquids, or gases. Oxygen is needed to support the chemical reaction of combustion; typically, the air provides enough oxygen for fire to burn. The source of ignition is the heat or spark that initiates the combustion process. This could come from various sources, such as a flame, electrical spark, or friction.

The combination of these three components forms what is known as the "fire triangle." Without any one of these elements, a fire cannot start or continue to burn. This foundational principle is crucial in understanding fire safety and prevention strategies in various contexts, including aviation operations where engine fires and other emergencies are a concern.