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Chapter XVI: Arson and Explosives
Terms in this set (50)
Most explosives can be recovered from debris for future study by being rinsed with:
Combustion occurring at the surface of a solid describes:
Water being heated on a stove illustrates the concept of:
The quantity of heat from a chemical reaction comes from:
The breaking and formation of chemical bonds
Which is an explosive readily detonated by heat or shock?
Which is a chemical used to synthesize the explosive TATP?
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.
All combustible fuels simultaneously igniting to engulf a structure in flames is known as:
Complex chromatographic accelerant patterns can be simplified by:
Heat energy can ignite distant objects through the transmission of:
Which type(s) of screening and confirmation tests are used for analyzing evidence of explosives?
- Color spot tests
- Gas chromatography/Mass spectrometry
Gasoline residues are best characterized by:
What is the rapid combination of oxygen with a fuel, which produces a noticeable release of energy?
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
What is the minimum temperature at which a liquid fuel will produce enough vapor to burn?
The speed in a low explosive is called the speed of:
Single-base smokeless powder consists of:
Which is a device used to screen objects for the presence of explosive residues?
Arson investigators must work quickly to collect evidence at a fire scene because:
- Safety requirements may require that cleanup and salvage operations begin quickly
- Accelerant residues may quickly evaporate
- Accelerants in soil may rapidly degrade
Many explosives must have their own source of:
What is the decomposition of organic matter by heat?
Hydrocarbon accelerants can be detected by:
- Trained dogs
- A portable detector (sniffer)
What is the major advantage of using the vapor concentration technique with gas chromatography?
High sensitivity for detecting volatile residues
Which are common chemical ingredients of black powder?
Potassium nitrate, charcoal, sulfur
Which of the following is a poor conductor of heat?
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
Movement of heat through a solid object is caused by:
Examples of secondary explosives do NOT include:
Which is NOT a high explosive?
Which chemical reaction is associated with a fire?
Which is most widely used low explosive?
- Smokeless powder
- Black powder
The minimum temperature at which a fuel will spontaneously ignite is called:
The ignition temperature
Which is often used as the explosive core in a detonating cord?
High explosives can be classified as either ________ or ________ explosives.
Telltale signs of arson include:
- Trails of burn patterns
- The presence of containers
- Separate points of origin
A procedure commonly used as a screening test for explosive residues is:
- Gas-chromatography-mass spectrometry
- Color spot tests
- Thin-layer chromatography
A low explosive has a velocity of detonation less than:
1000 meters per second
What is the concentration at which a vapor-to-fuel mixture in the air is capable of burning?
Which instrumentation is considered the most sensitive for detecting and characterizing flammable residues?
The minimum temperature at which fuel vapor will ignite is known as:
The ignition temperature
When investigators search a fire scene, the first focus must be on:
Finding the origin of the fire
A fuel can only achieve combustion in:
The gaseous state
Factors that can contribute to abnormal observations at a fire scene include:
- Stairways or elevator shafts
- Winds or drafts
- Secondary fires due to collapsing floors or roof
Which is an initiating explosive often used in detonators?
Which is a natural heat-producing process that may give rise to a fire?
Materials that have electrons firmly attached to their molecules:
Are poor conductors of heat
Which is available in commercial form as fertilizer?
What is radiation?
Transfer of heat energy from a heated surface to a cooler surface
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