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Chapter 16: Arson and Explosives (Test)
Terms in this set (50)
Most explosives can be recovered from debris for future study by being rinsed with:
The likelihood that spontaneous combustion will occur in improperly ventilated containers of highly unsaturated oils is ________ the likelihood that such combustion will occur with hydrocarbon lubricating oils.
Heat energy can ignite distant objects through the transmission of:
Which is a chemical used to synthesize the explosive TATP?
Which is an initiating explosive often used in detonators?
Hydrocarbon accelerants can be detected by:
a portable detector (sniffer) and trained dogs
What is the minimum temperature at which a liquid fuel will produce enough vapor to burn?
When investigators search a fire scene, the first focus must be on:
finding the origin of the fire
The transfer of heat energy by the movement of molecules within a liquid or gas is:
Which of the following CANNOT be determined from a laboratory examination of evidence recovered from an arson?
the brand name of gasoline used to start the fire
Which of the following is a poor conductor of heat?
paper, wood and plastic
Which type(s) of screening and confirmation tests are used for analyzing evidence of explosives?
color spot tests, TLC, gas and chromatography/mass spectrometry
What is the major advantage of using the vapor concentration technique with gas chromatography?
high sensitivity for detecting volatile residues
Which is a natural heat-producing process that may give rise to a fire?
Which is available in commercial form as fertilizer?
Which is a homemade explosive that has been used by terrorist organizations in the Middle East?
A common classification system characterizes ignitable liquids based on their boiling point ranges and number of ________ molecules as light, medium, and heavy petroleum distillates.
Which instrumentation is considered the most sensitive and reliable for detecting and characterizing flammable residues?
What is the concentration at which a vapor-to-fuel mixture in the air is capable of burning?
The speed in a low explosive is called the speed of:
Which are common chemical ingredients of black powder?
potassium nitrate, charcoal and sulfur
Which is an explosive readily detonated by heat or shock?
All combustible fuels simultaneously igniting to engulf a structure in flames is known as:
Factors that can contribute to abnormal observations at a fire scene include:
secondary fires due to collapsing floors or roof, stairways or elevator shafts, and winds or drafts
Telltale signs of arson include:
trails of burn patterns, separate points of origin, and the presence of containers
Materials that have electrons firmly attached to their molecules:
are poor conductors of heat
Which is the most widely used low explosive?
black powder and smokeless powder
The minimum temperature at which a fuel will spontaneously ignite is called:
the ignition temperature
Complex chromatographic accelerant patterns can be simplified by:
Water being heated on a stove illustrates the concept of:
What is radiation?
Transfer of heat energy from a heated surface to a cooler surface
Examples of secondary explosives do NOT include:
What is the decomposition of organic matter by heat?
Combustion occurring at the surface of a solid describes:
Many explosives must have their own source of:
High explosives can be classified as either ________ or ________ explosives.
A fuel can only achieve combustion in:
the gaseous state
Which is a device used to screen objects for the presence of explosive residues?
Gasoline residues are best characterized by:
The minimum temperature at which fuel vapor will ignite is known as:
the ignition temperature
A procedure commonly used as a screening test for explosive residues is:
color spot tests, thin layer chromatography, gas chromatography-mass spectrometry
A low explosive has a velocity of detonation less than:
1000 meters per second
Arson investigators must work quickly to collect evidence at a fire scene because:
accelerates in soil may rapidly degrade, safety requirements may require that cleanup and salvage operations begin quickly, and
accelerate residues may quickly evaporate
Which is often used as the explosive core in a detonating cord?
Single-base smokeless powder consists of:
What is the rapid combination of oxygen with a fuel, which produces a noticeable release of energy?
Which is NOT a high explosive?
Movement of heat through a solid object is caused by:
Which chemical reaction is associated with a fire?
The quantity of heat from a chemical reaction comes from:
the breaking and formation of chemical bonds
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