Deck 10: Firearms Examination

Question 1

The science involving the propulsion, flight, and impact of projectiles is referred to as ____________.

A) Forensic Aeronautics
B) Bullet spatter analysis
C) Trajectory
D) Ballistics

Answer 1

D

Question 2

After a bullet strikes and perforates the skin, the opening will always remain the same diameter as the bullet.

Answer 2

False

Question 3

The two types of ballistic fracture patterns that occur in glass are __________ fractures and _________ fractures.

A) Breaks and fragments
B) Radial and concentric
C) Cracks and breaks
D) None of the above

Answer 3

B

Question 4

The helical grooves in the bore of a firearm are used to impart a rotary motion to a projectile. These grooves are called________.

A) Ridges
B) Striations
C) Rifling
D) Minutia

Question 5

Between the grooves in the bore of a firearm there are surfaces of the original bore remaining. These are called____________.

A) Non-grooves
B) Muzzles
C) Class characteristics
D) Lands

Question 6

The field of firearms identification is referred to as forensic ballistics.

Question 7

Which of the following are the two groups of firearms?

A) Long arms and handguns
B) Rifles and shotguns
C) Revolvers and semi-automatic
D) Single shot and multiple shot

Question 8

_____________ is/are found in gun barrels and imparts a twisting motion on the bullet as it leaves the barrel.

A) Ridges
B) Minutia
C) Rifling
D) imperfections

Question 9

After properly documenting ballistic impact marks with photography, trajectory paths should be illustrated using a method least to alter or damage the impact mark(s)

Question 10

Shotguns differ in two major ways from other firearms: shotgun barrels are usually not rifled but are smoothbore and fire a different type of ammunition consisting of many lead pellets, rifled slugs, sabots or shot.

Question 11

Typically, how long will GSR remain on the shooter's hands?

A) 1 hour
B) 3 hours
C) 6 hours
D) 24 hours

Question 12

When a firearm is found at a scene it must be rendered safe and collected immediately and then documented.

Question 13

Which of the following can be used to determine the approximate position of the shooter?

A) Cartridge casings
B) Bullets
C) Cartridges
D) All of the above

Question 14

With a contact gunshot to a victim there is often blood found within the barrel of the handgun. This is called:

A) Back-spatter
B) Forward-spatter
C) Low velocity spatter
D) Spatter pressure

Question 15

Which of the following marks found on cartridge casings can be used to identify the make of the firearm?

A) Striations
B) Lands
C) Grooves
D) Extractor

Question 16

When investigating a shooting scene, the absence of cartridge casings always indicates the use of a revolver.

Question 17

Which type of wound is less likely to result in blood spatter at the entrance wound?

A) Distant wound
B) Shotgun wound
C) Contact wound
D) Knife wound

Question 18

The forensic examination of cartridge casings is useful in ________________.

A) Identifying the weapon from which it was fired
B) Determining whether the weapon is functional
C) Identifying the caliber
D) All of the above

Question 19

The cluster casings located at a shooting scene may assist in determining the shooter's position.

Question 20

What question can be answered with the proper utilization and interpretation of firearms evidence.

A) What kind of weapon was used?
B) Was the weapon in proper working order?
C) In what direction was the firearm fired?
D) All of the above

Question 21

Firearm evidence can be useful in corroborating accounts of the crime and determining the truthfulness of statements of witnesses, suspects, and victims.

Question 22

Which is not true when examining glass fractures caused by gunshots.

A) Concentric fractures are circular type cracks appearing around the point of impact.
B) Radial fractures are linear cracks that extend from the point of impact.
C) Sequence of impacts can be determined by fractures ending at previous glass fractures.
D) The coning effect in glass is largest at the entry point.