Exam 17: Forensic Aspects of Fire and Explosion Investigation

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.

What is the main advantage of analyzing accelerant residues from a fire using the vapor concentration technique over the headspace technique?

A fire will burn until either the oxygen or the fuel is exhausted.

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)The entire range of possible gas or vapor fuel concentrations in air that are capable of burning B)Any material used to start or sustain a fire C)The decomposition of solid organic matter by heat D)The minimum temperature at which a fuel spontaneously ignites E)A chemical transformation in which heat energy is liberated F)Any compound consisting of only carbon and hydrogen G)A chemical transformation in which heat is absorbed from the surroundings H)The combination of oxygen with other substances to produce new substances I)The ability or potential of a system or material to do work J)Combustion on the surface of a solid fuel in the absence of heat high enough to pyrolyze the fuel K)Rapid combination of oxygen with another substance, accompanied by production of noticeable heat and light L)An offender's pattern of operation M)A fire caused by a natural heat-producing process in the presence of sufficient air and fuel N)The minimum temperature at which a liquid fuel produces enough vapor to burn O)The heat liberated during combustion -Endothermic reaction

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)The entire range of possible gas or vapor fuel concentrations in air that are capable of burning B)Any material used to start or sustain a fire C)The decomposition of solid organic matter by heat D)The minimum temperature at which a fuel spontaneously ignites E)A chemical transformation in which heat energy is liberated F)Any compound consisting of only carbon and hydrogen G)A chemical transformation in which heat is absorbed from the surroundings H)The combination of oxygen with other substances to produce new substances I)The ability or potential of a system or material to do work J)Combustion on the surface of a solid fuel in the absence of heat high enough to pyrolyze the fuel K)Rapid combination of oxygen with another substance, accompanied by production of noticeable heat and light L)An offender's pattern of operation M)A fire caused by a natural heat-producing process in the presence of sufficient air and fuel N)The minimum temperature at which a liquid fuel produces enough vapor to burn O)The heat liberated during combustion -Ignition temperature

A procedure commonly used as a screening test for explosive residues is:

Plastic bags are suitable to store evidence suspected of containing explosive residues.

Arson investigators must work quickly to collect evidence at a fire scene because:

What is NOT true about primary explosives?

Which is the most widely used low explosive?

The ________ point is the lowest temperature at which a liquid gives off sufficient vapor to form a mixture with air that will support combustion.

What are the three mechanisms of heat transfer? What is the difference between them?

Which is a homemade explosive that has been used by terrorist organizations in the Middle East?

Wood is a poor insulator.

The brand name of a gasoline sample cannot currently be determined by any technique.

A primary explosive is easily detonated by heat, friction, or ________.

A fuel can only achieve combustion in:

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)The entire range of possible gas or vapor fuel concentrations in air that are capable of burning B)Any material used to start or sustain a fire C)The decomposition of solid organic matter by heat D)The minimum temperature at which a fuel spontaneously ignites E)A chemical transformation in which heat energy is liberated F)Any compound consisting of only carbon and hydrogen G)A chemical transformation in which heat is absorbed from the surroundings H)The combination of oxygen with other substances to produce new substances I)The ability or potential of a system or material to do work J)Combustion on the surface of a solid fuel in the absence of heat high enough to pyrolyze the fuel K)Rapid combination of oxygen with another substance, accompanied by production of noticeable heat and light L)An offender's pattern of operation M)A fire caused by a natural heat-producing process in the presence of sufficient air and fuel N)The minimum temperature at which a liquid fuel produces enough vapor to burn O)The heat liberated during combustion -Accelerant

Paper is not good for spreading a fire or causing ignitions far from the initial heat source.

________ combustion is fire caused by a natural heat-producing process in the presence of sufficient air and fuel.