Final answer:
The three factors that are present in the fire service are heat, fuel, and oxygen. These elements are necessary for fire to occur and sustain.
Step-by-step explanation:
The three factors that are present in the fire service are heat, fuel, and oxygen. These three elements are necessary for fire to occur and sustain.
- Heat: A heat source ignites the fire and enables it to spread. Heat allows fire to dry out nearby fuel and warm the surrounding air, facilitating combustion.
- Fuel: Fuel refers to any combustible material. It can be characterized by its moisture content, size, shape, quantity, and arrangement. The moisture content of fuel determines how easily it will burn.
- Oxygen: Fire requires oxygen to burn. The air contains about 21 percent oxygen, and most fires require at least 16 percent oxygen content to sustain combustion. Oxygen supports the chemical processes that occur during fire.