Exam 17: Forensic Aspects of Fire and Explosion Investigation

________ are trails of flammable material,such as gasoline or paper,spreading outward from a fire's point or origin in order to cause the fire to move rapidly from one room to another.

Which of the following is a poor conductor of heat?

Ammonium nitrate is a(n)________ agent.

Criminalist Matt Hughes arrives arrives at the scene of an explosion.He first carries out a search of the periphery of the crime scene,questions several witnesses,and then locates the crater caused by the blast.After finding the crater,he uses a sifter to separate the debris at the site for evidence.Any large pieces of detonators or foreign materials that did not fall through the mesh are collected and packaged in small paper bags.Large,jagged pieces found in the crater are wrapped in paper then placed in another paper bag.What mistakes,if any,did Matt make in collecting and storing this evidence?

What is the minimum temperature at which a liquid fuel will produce enough vapor to burn?

Water being heated on a stove illustrates the concept of:

Which instrumentation is considered the most sensitive and reliable for detecting and characterizing flammable residues?

The most obvious characteristic of a high or contained low explosive is the presence of a(n)________ at the origin of the blast.

Two to three quarts of ash and soot debris must be collected at the point of origin of a fire when arson is suspected.

The transfer of heat energy by the movement of molecules within a liquid or gas is:

Movement of heat through a solid object is caused by:

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

In a fire scene the electromagnetic radiation moves in a(n)________ line from one surface to another.

Complex chromatographic accelerant patterns can be simplified by:

What is the rapid combination of oxygen with a fuel,which produces a noticeable release of energy?

High explosives can be classified as either ________ or ________ explosives.

________ is the combination of oxygen with other substances to produce new substances.

Black powder does not explode when unconfined.

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

Most arsons are started with ________-based accelerants such as gasoline or kerosene.