Forensic Ballistics Topicwise Questions || Part-4

Forensic Ballistics Topicwise Questions  

Q1. The identification of a shotgun possible when the fired cartridge contains?

A) A shots 

B) B shots

C) Buck shots 

D) Bird shots

Answer : Buck shots

Explanation: 

Buckshot:- size of projectiles (shot/pellets) loaded into the shotgun shell is larger & in lower numbers.

Birdshot:- have smaller pellets in much higher quantities.

Q2. Wads are found in the cartridge of the following firearm?

A) Revolver 

 B) Airgun

 C) Rifles 

 D) Shotgun

Answer: Shotgun

Explanation: The term “wad” refers to a component of a shotgun shell that is used to separate the shot from the powder, contain the shotgun shot and provide a seal that prevents gas from blowing through the shot.

Q3. The diameter of LG shot is?

A) 9.14 mm 

 B) 8.43 mm) 

 C) 5.16 mm 

 D) 6.83 mm

Answer: 9.14 mm

Q4. .303 rifle cartridge has which type of cartridge?

A) Pin fire cartridge 

 B) Rim fire cartridge 

 C) Centre fire cartridge 

 D) Blank cartridge

 Answer: Rim fire cartridge

 Explanation: Rim fire cartridge / ammunition is a type of metallic cartridge whose primer is located within a hollow circumferential rim protruding from base of its casing.Rimfire ammunition is limited to low pressure loads, these are not reloaded.

Q5. Which of the following points are not included in Indian Arms Act 1959?

A) Articles designed for submarine mining 

 B) Explosives and noxious gasses

C) Fuse and friction tubes 

 D) Comparison of only rifled firearms

Answer: Comparison of only rifled firearms

Q6. Semi smokeless powder consists of the following composition of elements?

A) Mineral 

 B) Saltpeter

 C) Nitrocellulose 

 D) Nitroglycerine

Answer: Nitrocellulose

Explanation: Semi Smokeless powder was invented by the scientist Paul Vieille in 1884.It is a type of propellant used in firearm and artillery that produce less smoke and less fouling smell when fired compared to gunpowder “black powder”. Semi Smokeless powder is a mixture of black powder and nitrocellulose. The composition is:

Nitrated wood cellulose- 20%

Potassium nitrate- 60%

Carbon- 12%

Sulphur- 8%

Q7. Which facilitates the passage of a bullet during its movement in the barrel?

A) Wads 

 B) Percussion cap

 C) Propellant 

 D) Cannelure

Answer: Cannelure

Explanation: Cannelure is an indented ring or series of groves present at the base of the bullet around cylindrical surface.It serves as a preservative for projectile and prevents oxidation.

Q8. Bullet that leaves a visible smoke mark on the fight is called?

A) Fragile bullet 

 B) Jacketed bullet

 C) Tracer bullet 

 D) Hollow point bullet

Answer: Tracer bullet

Explanation: Tracer ammunition are the bullets or cannon projectiles that are built with a pyrotechnique charge in the base i.e. upon ignition, the heated salt releases its oxygen to sustain combustion of fuel in mixture. The mixture consists of metallic fuel,oxidizer is a salt molecule that contains oxygen combined with specific atoms responsible for desired color.

Q9. A bullet gets lodged inside the barrel and comes out with another bullet fired from the same gun is said to be which type of bullet?

A) Dum dum bullets 

 B) Jacketed bullets

 C) Tandem bullets 

 D) Slug bullet

Answer: Tandem bullets

Explanation: In tandem bullets the gunpowder becomes lodged in the barrel because of insufficient force to discharge it from the gun. Depending on the range of fire, tandem bullets produce a single entrance around or separate entrance sites.

Q10. In case of firing of lead bullets, the blackening is confused by some criminal justice functionaries,with?

A) Lead ring around the gunshot hole 

 B) Lead splash around the gunshot hole

C) Dirt ring around the gun shot hole 

 D) All of the above

Answer: All of the above

Explanation: A lead ring or a metal ring around the entry wound results from deposition of very small quantities of lead or metal in the form of ring or collar, as the projectile enters the skin. The lead ring can be analyzed by radiology or by Neutron Activation Analysis.The spin of the bullet causes wiping of its surface on the skin while entering. This is called grease on a dirt collar.