Fire, Arson Etc. Flashcards
The air we breathe is about __% oxygen
21
Fire needs and atmosphere with about __% oxygen
16
A liquid burns when the when the temperature is high enough to vaporize it. Known as..
flash point
In order for there to be a fire, solid must be hot enough to decompose into gaseous products. Know as…
pyrolysis
In order to initiate and sustain combustion, three things are needed
1) Fuel
2) Oxygen
3) Heat
The three mechanisms of heat transfer are…
conduction, radiation, convection
The three major signs of arson are
1) Streamers
2) Separate unconnected fires
3) Burning on the floor in stead of ceiling (Due to gas on the floor)
Traces of flammable liquid residues may be located with a _____ ______
Vapor Detector (sniffer)
It is important that a sampling of similar but uncontaminated _______ ______ be collected.
control specimens
In the laboratory, the ____ _____________ is the most sensitive and reliable instrument for detecting and characterizing flammable residues.
gas chromatograph
Fire is produced when a
Substance undergoes rapid oxidation involving heat and light.
Fire Triangle
Shows the three elements needed to produce and sustain a fire.
Flash Point
The lowest temperature to which a substance must be heated in order for the substance to give off vapors which will burn when exposed to a flame or ignition source.
Point of Origin
The location where the fire started.
Burn patterns
Noticeable patterns created by the fire as it burns.
