Missouri Ballistics Technician Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. In forensic ballistics examination, which principle best explains why a
fired bullet can be matched to a specific firearm based on microscopic
markings imparted during passage through the barrel?
A. Conservation of momentum
B. Locard’s exchange principle
C. Individualization theory of toolmarks
D. Newton’s third law of motion
Answer: C
Rationale: The individualization theory of toolmarks explains that
microscopic imperfections in a firearm barrel impart unique markings
on bullets, allowing examiners to match bullets to a specific firearm.
,2. When examining cartridge cases under comparison microscopy, which
feature is most critical for determining a match between two fired
cases?
A. Bullet caliber
B. Primer composition
C. Breech face marks
D. Powder charge weight
Answer: C
Rationale: Breech face marks are unique impressions left on the
cartridge case by the firearm and are crucial for identifying a match
between fired cases.
3. The primary function of rifling in a firearm barrel is to:
A. Reduce recoil
B. Increase muzzle flash
C. Stabilize the projectile through spin
D. Decrease firing noise
Answer: C
Rationale: Rifling imparts a spin to the projectile, stabilizing it in
flight and improving accuracy.
4. Which characteristic of rifling refers to the number of grooves cut into
the barrel?
A. Pitch
B. Land width
, C. Groove diameter
D. Number of lands and grooves
Answer: D
Rationale: The number of lands and grooves describes how many
raised and recessed sections are present in the barrel rifling.
5. In ballistics, what is the term for the distance a bullet travels from the
muzzle to the target?
A. Terminal range
B. Internal trajectory
C. External trajectory
D. Transitional trajectory
Answer: C
Rationale: External trajectory refers to the path of a bullet after it
exits the firearm until it reaches the target.
6. What type of evidence is gunshot residue (GSR) considered in forensic
analysis?
A. Biological evidence
B. Chemical trace evidence
C. Impression evidence
D. Digital evidence
Answer: B
Rationale: GSR consists of chemical particles deposited after
discharge, making it trace chemical evidence.
, 7. Which instrument is commonly used to compare bullets and cartridge
cases side-by-side?
A. Scanning electron microscope
B. Comparison microscope
C. Gas chromatograph
D. Spectrophotometer
Answer: B
Rationale: A comparison microscope allows simultaneous viewing of
two specimens to identify matching markings.
8. Which component of a cartridge ignites the powder charge when
struck by the firing pin?
A. Case
B. Primer
C. Bullet
D. Propellant
Answer: B
Rationale: The primer contains a sensitive explosive that ignites the
powder when struck.
9. What is the primary purpose of a firing pin in a firearm?
A. Extract spent casings
B. Load ammunition
C. Strike the primer
D. Stabilize the barrel
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. In forensic ballistics examination, which principle best explains why a
fired bullet can be matched to a specific firearm based on microscopic
markings imparted during passage through the barrel?
A. Conservation of momentum
B. Locard’s exchange principle
C. Individualization theory of toolmarks
D. Newton’s third law of motion
Answer: C
Rationale: The individualization theory of toolmarks explains that
microscopic imperfections in a firearm barrel impart unique markings
on bullets, allowing examiners to match bullets to a specific firearm.
,2. When examining cartridge cases under comparison microscopy, which
feature is most critical for determining a match between two fired
cases?
A. Bullet caliber
B. Primer composition
C. Breech face marks
D. Powder charge weight
Answer: C
Rationale: Breech face marks are unique impressions left on the
cartridge case by the firearm and are crucial for identifying a match
between fired cases.
3. The primary function of rifling in a firearm barrel is to:
A. Reduce recoil
B. Increase muzzle flash
C. Stabilize the projectile through spin
D. Decrease firing noise
Answer: C
Rationale: Rifling imparts a spin to the projectile, stabilizing it in
flight and improving accuracy.
4. Which characteristic of rifling refers to the number of grooves cut into
the barrel?
A. Pitch
B. Land width
, C. Groove diameter
D. Number of lands and grooves
Answer: D
Rationale: The number of lands and grooves describes how many
raised and recessed sections are present in the barrel rifling.
5. In ballistics, what is the term for the distance a bullet travels from the
muzzle to the target?
A. Terminal range
B. Internal trajectory
C. External trajectory
D. Transitional trajectory
Answer: C
Rationale: External trajectory refers to the path of a bullet after it
exits the firearm until it reaches the target.
6. What type of evidence is gunshot residue (GSR) considered in forensic
analysis?
A. Biological evidence
B. Chemical trace evidence
C. Impression evidence
D. Digital evidence
Answer: B
Rationale: GSR consists of chemical particles deposited after
discharge, making it trace chemical evidence.
, 7. Which instrument is commonly used to compare bullets and cartridge
cases side-by-side?
A. Scanning electron microscope
B. Comparison microscope
C. Gas chromatograph
D. Spectrophotometer
Answer: B
Rationale: A comparison microscope allows simultaneous viewing of
two specimens to identify matching markings.
8. Which component of a cartridge ignites the powder charge when
struck by the firing pin?
A. Case
B. Primer
C. Bullet
D. Propellant
Answer: B
Rationale: The primer contains a sensitive explosive that ignites the
powder when struck.
9. What is the primary purpose of a firing pin in a firearm?
A. Extract spent casings
B. Load ammunition
C. Strike the primer
D. Stabilize the barrel
