FORENSIC BALLISTICS
Q1. In which of the following slower burning propellant powder is used?
a. Heavy calibre weapons
b. Long barrels
c. Shotguns
d. Both a and b
ANSWER:
d. Both a and b
EXPLANATION:
Slower burning propellant powders are used in heavy caliber weapons and long barrels because they need to exert a sustained force on the projectile over a longer period to achieve optimal velocity. This slower burn rate allows for better utilization of the powder's energy and prevents excessive pressure build-up in the barrel, which could be detrimental to the weapon.
Q2. Which is the oldest and earliest form of propellant used in firearms?
a. Black powder
b. Nitrocellulose
c. Nitroglycerine
d. All of the above
ANSWER:
a. Black powder
EXPLANATION:
Black powder is considered the oldest known propellant used in firearms, having been invented in China centuries ago. Nitrocellulose and nitroglycerine are more modern developments in propellant technology, used in smokeless powders.
Q3. What is the threshold velocity for bone penetration?
a. 60 m/s
b. 40-50m/s
c. 80m/s
d. 100-120 m/s
ANSWER:
a. 60 m/s
Q4. Which of the following refers to the single entire projectile package that gets loaded into the gun?
a. Calibre
b. Slug
c. Cartridge
d. Round
ANSWER:
c. Cartridge
EXPLANATION:
A cartridge is the complete unit of ammunition that includes the bullet (projectile), powder, primer, and casing. When loaded into a gun, the entire cartridge is placed in the chamber ready to be fired
Q5. What is a wadcutter bullet primarily used for?
a. Home defense
b. Target practice
c. Maximum target damage
d. Large game hunting
ANSWER:
b. target practice
EXPLANATION:
Wadcutters are designed to create clean, round holes in paper targets, making them ideal for scoring in competitions.
Q6. What is the difference between a bullet and a cartridge?
a. The bullet is the projectile while the cartridge holds the bullet, powder and primer.
b. The cartridge is the projectile, while the bullet holds the cartridge, powder and primer.
c. They are the same thing.
d. A bullet is larger and used more frequently than a cartridge.
ANSWER:
a. The bullet is the projectile while the cartridge holds the bullet, powder and primer.
EXPLANATION:
The bullet is the metal projectile that is fired from a firearm, essentially the part that leaves the barrel.
The cartridge is the complete round of ammunition, which includes the bullet, the gunpowder, a primer, and a casing that holds them together.
Q7. Which of the following is not a true meaning of the word “bullet”?
a. A small sphere
b. The complete assembly of cartridge case, primer, propellant and projectile that is to be fired in a gun.
c. A projectile used for a small calibre gun.
d. One of those small arms projectile fired one at a time from the barrel of a gun.
ANSWER:
b. The complete assembly of cartridge case, primer, propellant and projectile that is to be fired in a gun
Q8. Which of the following is used to analyze the presence of gunshot residues?
a. Refractive index measurements.
b. Microspectrophotometry
c. Scanning electron microscopy in conjunction with energy dispersive X ray analysis
d. Polarized light microscopy
ANSWER:
c. Scanning electron microscopy in conjunction with energy dispersive X ray analysis
EXPLANATION:
Scanning electron microscopy (SEM) allows for detailed imaging of small particles, while energy dispersive X-ray (EDX) analysis can identify the elemental composition of those particles, making it a powerful combination for detecting the characteristic elements present in gunshot residue, like lead, antimony, and barium.
Q9. The feature of an entry wound caused by a revolver from a distance of 6 feet ?
a. Abrasion collar present
b. Singeing of hair present
c. Grease/ dirt ring present
d. Wad injury present
ANSWER:
a. Abrasion collar present
EXPLANATION:
Abrasion collar is a ring of abrasion around the entry wound caused by friction of the bullet passing through the skin. It is a common feature of firearm wounds, especially when bullet is fired from a close range but not in direct contact with the skin.
Singeing of hair typically occurs when shot is fired very close to or in direct contact with the body.
Q10. Distance through which the projectile falls from fire line at certain range is called?
a. Range
b. Drop
c. Vertex
d. Drift
ANSWER:
b. Drop
EXPLANATION:
The term "drop" refers to the vertical distance a projectile falls from its firing line to the ground at a given range. It's the component of the projectile's motion along the vertical axis.
Range describes the horizontal distance travelled by a projectile. It's the total horizontal displacement from the launch point to the point where the projectile hits the ground.
Vertex refers to the highest point of the projectile's trajectory. It's the maximum vertical position reached by the projectile during its flight.
Drift refers to a slight deviation in the projectile's trajectory caused by factors like wind resistance or imperfections in the projectile itself. It's a lateral displacement, not a vertical drop.
Content Writer:- Bhawana Sharma
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