Prelim 2 Flashcards
Act or process of lowering down the intensity of heat
FIRE SUPPRESSION
An act or process of preventing the fire from spreading, thus preventing further damage.
FIRE CONTROL
based on removing any one or more of the four elements in the Fire Tetrahedron to suppress the fire.
fire extinguishment
refers to all measures towards the inception of fire
FIRE PREVENTION
Breaking the chemical chain reaction. This method is effective only on burning gas and liquid fuels as they cannot burn in smoldering mode of combustion.
Inhibiting
oxygen content of air is reduced below 15% (from normal 21%) in volume by using chemicals, water, fog, sand blankets, etc. (Reduction of oxygen concentration).
Blanketing/Smothering
supply of fuel or material is cut off. Elimination of the fuel supply/source which may be done by stopping the flow of liquid fuel, preventing the production of flammable gas, removing the solid fuel at the fire path, allowing the fire to burn until the fuel is consumed. (removal of fuel)
Starving
Temperature of the substance is lowered below the burning point by using water or water solution(reduction of heat).
Quenching/Cooling
4 GENERAL METHODS OF FIRE EXTINGUISHMENT
- Quenching/Cooling
- Starving
- Blanketing/Smothering
- Inhibiting
4 CLASSIFICATION OF FIRE BASED ON FUEL
- Class A Fire
- Class B Fire
- Class C Fire
- Class D Fire
metallic Fires; fires that result from the combustion of certain metals in finely divided forms. These combustible metals include magnesium, potassium, powdered calcium, zinc, sodium and titanium.
Class D Fire
Electrical fires; they are fire that starts in live electrical wire, equipment, motors, electrical appliances and telephone switch boards. This fire can be controlled by a non-conducting extinguishing agent(de-generize the electrical circuit).
Class C Fire
Fire-Liquid fires; they are caused by flammable and or combustible liquids such as kerosene, gasoline, oil products, alcohol and other hydrocarbon deviations. This can be extinguished by blanketing or smothering.
Class B Fire
ordinary fires; this is the type of fire resulting from the burning of woods, paper, textiles, rubber and other carbonaceous materials. This is the type of fire caused by ordinary combustible materials.
Class A Fire
is a mechanical device, usually made of metal, containing chemicals, fluids, or gasses for stopping fires. It is a portable device used to put out fires of limited size.
FIRE EXTINGUISHER
