FT 105 Ch. 3

Planned and controlled self sustaining chemical reaction between a fuel and oxygen with the evolution of heat and light.

Rapid self sustaining oxidation process that involves heat, light, and smoke in different quantities.

Older three sided model used to describe the necessary requirments for fire.

Four sided model describing heat, fuel, oxygen, and chemical reaction need for combustion.

Molecular fragment possessing at least one upaired electron.

Break down of a solid into gaseous components when heated.

A.K.A Thermal decompostion

Material self heats to its piloted ignition temp. then ignites.

Ignition temp. of a liquid fuel, when heated it will self ignite.

Unburned products of combustion seen in smoke.

Captured cooler air that replaces the rising heated air surrounding the point of combustion.

Absence of flame with presence of hot materials in the surface where oxygen diffuses into the surface of the fuel.

C3H4O

Strong respiratory irritant produced when polyethylene is heated, or when materials with cellulose smolder.

HCI

• Colorless but pungent 
•  
• irritating gas givin off during thermal decomposition of materials that contain chlorine.

HCN

Colorless, almond odor

20X more toxic than CO

Asphyxiant can be absorbed through skin

Produced from combutsion of natural materials (wool, silk), or materials containing urea.

CO2

Colorless, odorless

Nonflammable gas

Can cause asphyxia by eliminating oxygen from confined space.

NO2 and NO

Smoke is a reddish brown color

Can have delayed symptoms

COCI2

Highly toxic, colorless gas

Disagreeable odor of musty hay

Symptoms delayed several hours from exposure

Produced when freon or refrigerants come into flame contact.

Proportion of fuel to oxygen and the resulting end products.

Ideal burning situation where there is perfect balance of fuel and oxygen.

Exothermic chemical reaction with flames occuring between a substance and oxygen.

Combustion process where the flames are part of the actual process.

Ordinary combustibles.

Extinguished by water.

Flammable liquids.

Extinguished by removing oxygen supply and cooling.

Electrical fire

Extinguished by cutting of power.

Combustible metals

Extinguish by specific foam mixture for different metals.

Cooking Oil

Extinguish by dry or wet chemical depending on sopanification. 

Process of chemically converting fatty acid to sopa or foam.

Ignition

Growth

Fully developed

Decay

Point in which the 4 components of the fire tetrehedron come together and materials reach there ignition temp.

Fire increases fuel consumption and heat generation.

Maximum Fuel consumption and heat occurs.

Flames travel up and long uburned gases during fire development.

Sudden event that occurs when all contents of a confined space reach there ignition temperature and ignite simultaneously.

Violent reignition of closed container that has consumed all the oxygen within the container when new oxygen is introduced.

Fire has consumed all available fuel and temperaure begins to decrease.

Used in high rise buildings to provide a safe environment within the structure where persons can be protected from fire.

Temp. difference between inside of a bulding and the outside of the building

Ratio of moisture in a given volume to the amount that volume would contain if saturated.

Heat that is absorbed when one gram of liquid is transformed into vapor at the boiling point under one atmospheric pressure.