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Physical Evidence Techniques Exam 4 Review

Terms in this set (40)

An advantage of modern casts over photography is:
A level, two-dimensional subject is not required for effective results.
True or False

Automated search systems are used to analyze integrated digital images of bullet striations and cartridge casings.
True
True or False

The bore of a firearm refers to the size of a particular ammunition cartridge used for that firearm.
False
Common recipients of impression include of the following except which of the subsequent choices?
Fabric
True or False

The crystallography of the metal in the area of stamped characters is permanently changed, compared to the bulk of the metal substrate.
True
True or False

The donor of impression evidence contains some three-dimensional markings.
True
True or False

Fingerprints are considered to be impression evidence.
True
Impression evidence...
Involves a donor and a recipient.
True or False

In 2000, about 66% of murders reported to the police were committed with a firearm.
True
True or False

It is always possible to individualize footwear impressions.
False
Which of the following is classified as a handgun?
Pistol
True or False

Lands and grooves are microscopic impressions on the interior of a firearm barrel.
False
True or False

It is not possible to case footwear impressions in snow.
False
True or False

The major prime elements found in residues are lead, barium, and aluminum.
False
Which of the following is not common donors of impression evidence?
Soil
Which of the following are used to visualize gunshot residue?
B and C: IR photography and Modified Griess Test
The metal structure below a stamped serial number is...
A and C
The muzzle of a shotgun is constricted by the manufacturer to produce what effect?
Choke
Today, bullet comparisons may include the use of:
A comparison microscope
True or False

Negative impressions should never be compared to a positive image.
True
True or False

Tire treads are designed for traction, prevention of hydroplaning, reduction of noise, and driving comfort.
True
The number of unique characteristics that must be present on an impression for it to be individualized to a donor is...
Indeterminate
True or False

The tip of semi-jacketed cartridges "mushrooms" on impact.
True
The __________ of metal atoms is disrupted when the surface is stamped with an alphanumeric die.
Crystal structure
Test firing bullets into a water tank:
Preserves the striae on the bullets.
True or False

Photography is always superior to casting impressions.
False
True or False

The stance of a motor vehicle is the distance from the center of the front hub to the center of the rear hub.
False
True or False

Plaster of Paris is relatively slow in drying and is not very hard when dry.
True
Smokeless powder is made up of:
Nitrocellulose and stabilizers
True or False

The plume material, that is forced down a bun barrel as the bullet leaves the muzzle, is not useful for forensic analysis.
False
Shoulder arms consist of all of the following except:
Semi-automatic pistol
True or False

Reference bullets are used for comparison purposes, as there is no practical method of comparing striations with the inner surface of a rifled weapon.
True
True or False

Serial numbers stamped in polymers are recovered using the same methods employed to restore serial numbers stamped in metals.
False
True or False

A revolver is designed to be fired from the shoulder with two hands.
False
Select the true statement.
Sprayed wax can be used to make casts of snow print impressions.
The search for footwear impressions should include:
All of the above
Select the true statement.
Proper packaging of firearms includes storing the weapon is such a way that the trigger is locked in place.
Select the statement that is not true.
A barrel's internal diameter is an approximation, whereas caliber is an exact measurement.
Select the statement that is not true.
Tool make marking in nearly the same way each time they come in contact with a surface.
Select the statement that is not true.
Impression evidence is always patent or visible.
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