11 Jun Which of the following scenarios could lead
Question
1.
Which of the following scenarios could lead to the phenomenon known as self-ignition?
Bacterial action in a haystack
Lightening striking a house
Faulty wiring in a home
A clock used as a time delay mechanism
Overheating of a car engine
1.
This analytical tool operates on similar principles to liquid chromatography and is gaining use as a tool to analyze explosives.
GC
CE
IR
HPTLC
MS
1.
If a fire that is burning with a limited supply of oxygen is suddenly ventilated, this may occur:
Incomplete combustion
Flame point
Flash point
Explosion
Flashback
1.
Which method of isolating fire residues involves the use of charcoal strips?
Headspace
Adsorption
Absorption
Solvent extraction
Gas chromatography
1.
A paint can has two tubes that can trap accelerants. Air is pumped through one tube into the can; headspace vapors are pulled out through the other tube. What technique does this describe?
Solid phase extraction
Headspace
Thin Layer Chromatography
Adsorption-Elution
Steam distillation
1.
High explosives:
Have detonation rates of 2,000 to 3,000 fps
Take place at optimal efficiency
Require the use of an explosives trains
Include black powder and ANFO
Possess a fuel and oxygen that are chemically combined
1.
Which of the following conditions is not necessary for a fire to occur?
Heat
Oxygen
Fuel
Accerlerant
Chain reaction
1.
Select the true statement.
A high order explosion may occur due to old, out-of-date explosives.
Fragmentation effects are generally the least damaging of the effects of an explosion
A vapor trace analyzer is a type of specialized GC that is optimized for explosives analysis
Black powder is comprised of sulfur nitrate, potassium and charcoal
Explosions are always more damaging than fires
1.
A number of characteristics are used to locate the point of origin of a fire. The destruction of a surface due to heat or other factors is called what?
Low burning
V-patterns burning
Charring
Spalling
Material distortion
1.
Infrared spectrophotometryâ¦
Is similar in some ways to HPLC
Can differentiate TNT and DNT
Provides only a tentative identification
Employs Greiss reagents
Has problems analyzing explosives due to high temperatures
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