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Questions and Answers
What exit do you use during a fire drill?
What exit do you use during a fire drill?
Before you exit the classroom what do you need to do first?
Before you exit the classroom what do you need to do first?
What do you do during a bomb threat?
What do you do during a bomb threat?
If a child gets left behind you do what?
If a child gets left behind you do what?
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Which of the following is NOT a component of the fire triangle?
Which of the following is NOT a component of the fire triangle?
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If there's a tornado warning you do what?
If there's a tornado warning you do what?
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Which fire stage is characterized by smoldering and a small amount of smoke?
Which fire stage is characterized by smoldering and a small amount of smoke?
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Where is our secondary meeting location?
Where is our secondary meeting location?
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Study Notes
Definition and Composition
- Fire is the rapid oxidation of a fuel source, resulting in the release of heat, light, and various products of combustion.
- Fire is a chemical reaction that involves the combination of fuel, oxygen, and heat.
Stages of Fire
- Incipient stage: The initial stage of fire, characterized by smoldering and a small amount of smoke.
- Growth stage: The stage where the fire spreads and grows, fueled by more oxygen and combustible materials.
- Fully developed stage: The peak stage of fire, characterized by intense heat, flames, and a large amount of smoke.
- Decay stage: The final stage of fire, where the fuel is depleted, and the fire dies out.
Fire Triangle
- The three essential elements required for a fire to start and sustain:
- Fuel: The material that undergoes combustion (e.g., wood, gasoline, propane).
- Oxygen: The oxidizer that supports combustion (typically atmospheric oxygen).
- Heat: The energy source that ignites the fuel (e.g., flame, spark, hot surface).
Fire Types
- Class A: Fires involving ordinary combustible materials (e.g., paper, wood, cloth).
- Class B: Fires involving flammable liquids or gases (e.g., gasoline, propane, oil).
- Class C: Fires involving electrical equipment (e.g., appliances, wiring, circuit breakers).
- Class D: Fires involving combustible metals (e.g., magnesium, titanium).
Fire Hazards and Risks
- Flashover: A sudden and intense increase in fire temperature, often causing a room to become fully engulfed in flames.
- Backdraft: A sudden explosion of flames that occurs when oxygen is reintroduced to a fire that has depleted its oxygen supply.
- Fire spread: The movement of fire from one location to another, often through convection or radiation.
Definition and Composition
- Fire is a rapid oxidation process of a fuel source releasing heat, light, and combustion products.
- Combustion requires three elements: fuel, oxygen, and heat.
Stages of Fire
- Incipient Stage: Initial phase with smoldering and minimal smoke.
- Growth Stage: Fire expands, fueled by increased oxygen and available combustibles.
- Fully Developed Stage: Peak intensity with high heat, flames, and significant smoke.
- Decay Stage: Final phase where fire diminishes due to fuel depletion.
Fire Triangle
- Essential components for fire ignition and maintenance:
- Fuel: Combustible materials like wood, gasoline, or propane.
- Oxygen: Typically from the atmosphere, supporting combustion.
- Heat: Energy source igniting the fuel, via flame, spark, or hot surface.
Fire Types
- Class A: Ordinary combustibles, including paper, wood, and cloth.
- Class B: Flammable liquids or gases such as gasoline and oil.
- Class C: Fires involving electrical equipment, like appliances and wiring.
- Class D: Fires that involve combustible metals, e.g., magnesium and titanium.
Fire Hazards and Risks
- Flashover: Rapid temperature rise causing a space to ignite fully.
- Backdraft: Explosive re-ignition of a fire when fresh oxygen is introduced.
- Fire Spread: Movement of fire facilitated by convection or radiation to other areas.
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Description
Understand the definition and composition of fire, including its stages of development, from incipient to fully developed.
