Questions Set-2_Forensic Ballistics Questions

 

Q11. Which of the following formulae helps to determine the age of a foetus?

a.       Haase’s

b.      Getleri

c.       Lund-Browder’s

d.      Wallace’s

Answer: 

Haase's Rule l

Q12. Assertion(A): Hollow point bullets are less likely to over-penetrate a target compared to full metal jacket bullets.

Reason(R): Hollow point bullets are designed to expand upon impact, transferring more energy to the target and reducing the risk of over-penetration.

a.      Both A and R are false.

b.      Both A and R are true.

c.       A is correct but R is false.

d.      A is false but R is correct.

ANSWER:

      b. Both A and R are true

EXPLANATION:

Hollow point bullets are designed to expand upon impact, creating a larger wound cavity and transferring more energy to the target. This expansion increases the bullet's surface area, slowing it down and reducing the risk of over-penetration. In contrast, full metal jacket bullets are less likely to expand and may retain more of their kinetic energy, potentially leading to over-penetration.

Q13. Firearm identification relies on the analysis of tool marks left on bullets and cartridge cases. In a shooting investigation, a forensic examiner compares tool marks on recovered evidence to those from a suspected firearm. The examination reveals a significant match between the tool marks on the recovered bullets and those from the suspected firearm. However, the cartridge cases show inconsistent markings. Which of the following statements best explains this discrepancy?

a) The suspected firearm was likely used to fire multiple bullets but different cartridge cases.

b) Tool marks on cartridge cases are less reliable for firearm identification compared to those on bullets.

c) The inconsistency in tool marks suggests tampering or alteration of the cartridge cases.

d) Different firearms may produce similar tool marks on bullets but distinctive markings on cartridge cases.

ANSWER:

d) Different firearms may produce similar tool marks on bullets but distinctive markings on cartridge cases.

EXPLANATION:

Tool marks on bullets are primarily influenced by the firearm's barrel rifling, resulting in distinctive patterns. However, cartridge cases may bear tool marks from various components of the firearm, such as the breech face, firing pin, and extractor. Different firearms can produce similar tool marks on bullets due to consistent rifling but may leave distinctive markings on cartridge cases due to variations in manufacturing and usage. Therefore, the discrepancy between tool marks on bullets and cartridge cases is not uncommon in firearm identification.

Q14. In forensic ballistics, what is the term for the examination of the firing pin impression on a cartridge case?

a) Extractor analysis

b) Firing pin profiling

c) Breech face examination

d) Chamber inspection

ANSWER:

b) Firing pin profiling

EXPLANATION:

Firing pin profiling involves analyzing the unique marks left by the firing pin on a cartridge case upon firing, which can aid in firearm identification

Q15. What term describes the phenomenon where a bullet's flight path curves downwards due to gravitational pull?

a) Bullet drop

b) Trajectory deflection

c) Terminal ballistics

d) Elevation deviation

ANSWER:

a)      Bullet drop

EXPLANATION:

Bullet drop refers to the downward curvature of a bullet's flight path caused by the force of gravity acting on the projectile.

Q16. GSR analysis primarily involves the detection and identification of which of the following elements or compounds?

a) Lead and copper

b) Barium and antimony

c) Nitrogen and sulfur

d) Carbon and hydrogen

ANSWER:

b)      Barium and antimony

EXPLANATION:

Gunshot residue typically consists of particles containing elements such as barium and antimony, which are commonly found in primers and propellants of ammunition.

Q17. Which of the following statements about the significance of GSR particles in a forensic investigation is true?

a) The absence of GSR particles definitively rules out firearm discharge.

b) The presence of GSR particles conclusively proves that an individual fired a gun.

c) GSR analysis alone can determine the specific firearm used in a shooting incident.

d) GSR particles are one of several pieces of evidence considered in a forensic investigation.

ANSWER:

 d).GSR particles are one of several pieces of evidence considered in a forensic investigation.

EXPLANATION:

While the presence of GSR particles can indicate recent contact with a firearm, their absence does not conclusively rule out firearm discharge.

Q18. Which of the following is NOT a limitation of gunshot residue (GSR) analysis in forensic investigations?

a) GSR particles can be easily washed away or contaminated.

b) Different ammunition types may produce varying GSR compositions.

c) GSR analysis cannot determine the specific firearm used in a shooting incident.

d) Environmental factors can impact the distribution and retention of GSR particles.

ANSWER:

c)       GSR analysis cannot determine the specific firearm used in a shooting incident.

EXPLANATION:

While GSR analysis can provide valuable information about firearm discharge, it typically cannot determine the specific firearm used in a shooting incident. Other evidence, such as bullet and cartridge analysis, may be necessary for firearm identification.

Q19. What term describes the angle at which a bullet impacts a surface relative to the surface's normal?

a) Incidence angle

b) Deflection angle

c) Trajectory angle

d) Normal angle

ANSWER:

a)      Incidence angle

EXPLANATION:

The incidence angle is the angle at which a bullet strikes a surface, measured relative to the surface's normal (perpendicular).

Q20. Assertion(A): Bullet caliber refers to the length of the bullet.

Reason(R): Caliber is a measurement of the diameter of a bullet or the internal diameter of a firearm barrel.

a.      Both A and R are false.

b.      Both A and R are true.

c.       A is correct but R is false.

d.      A is false but R is correct.

ANSWER:

d. A is false but R is correct

EXPLANATION:

Caliber refers to the diameter of a bullet or the internal diameter of a firearm barrel, not its length. It is typically measured in inches or millimeters and determines the size of the bullet a firearm can fire. For example, a firearm with a .45 caliber barrel is designed to fire bullets with a diameter of approximately 0.45 inches.

Author:- Bhawana Sharma