Fire and Its Stages

Questions and Answers

Primary (correct)

Secondary

Front Door (correct)

Hallway Door

get personal belongings (correct)

face to name (correct)

get coats for children

phone

Throw the red disc under door to hallway (correct)

hang up on the bomber

use a cell phone (correct)

use the walkie

use the red card and report missing child Signup and view all the answers

Water Signup and view all the answers

go to the hallway Signup and view all the answers

Incipient stage Signup and view all the answers

Somewhere by the MCX Signup and view all the answers

Study Notes

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.

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.

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).

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).

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.

Fire is a rapid oxidation process of a fuel source releasing heat, light, and combustion products.
Combustion requires three elements: fuel, oxygen, and heat.

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.

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.

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.

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.