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Forensic Ballistics Questions and Answers

81.

Burning, blackening and tattooing are useful for determination of

Exam Year(s)

UGC NET - 2012,

Answer: B

Burning, blackening and tattooing are useful in the determination of the distance of fire, option B. They are produced by flame, smoke, soot and unburnt powder particles, which travel only a short distance from the muzzle, so the size and density of the pattern change with the range. They are not used to find the time of fire (A) or the ricocheting of a bullet (C), so option D is also wrong.

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82.

Pump action of a firearm is also called

Exam Year(s)

UGC NET - 2012,

Answer: C

The pump action of a firearm is also called the trombone action, option C. The forearm of the weapon is slid back and forth to eject a spent cartridge and load a fresh one, a movement like the slide of a trombone. The lever action (A) uses an underlever, the bolt action (B) uses a bolt handle, and the air action (D) is not a standard name for this mechanism. The pump action is typical of many shot guns, which load the cartridges from a tubular magazine under the barrel.

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83.

Richochet of bullet means

Exam Year(s)

UGC NET - 2012,

Answer: B

Ricochet of a bullet means its deflection, option B. A bullet ricochets when it strikes a hard surface, such as a wall or water, at a glancing angle and rebounds in another direction, often with a change in shape and speed. It does not mean penetration of the bullet (A), an unfired bullet (C) or a tandem bullet (D).

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84.

Fouling is useful in determination of approximate

Exam Year(s)

UGC NET - 2012,

Answer: B

The key gives option B, time of fire, for the thing that fouling helps determine approximately. Fouling is the residue of burnt and unburnt powder, metal and soot left in the bore after firing, and as time passes the deposit changes in appearance by oxidation, so the state of the bore can indicate roughly how long ago the weapon was fired. The distance of fire (A) is judged from the pattern of burning, blackening and tattooing on the target, and the penetration (C) and velocity (D) of the projectile are measured in other ways.

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85.

7.62 mm AK-47 assault rifle has the magazine capacity of

Exam Year(s)

UGC NET - 2012,

Answer: C

The standard magazine of the 7.62 mm AK-47 assault rifle holds thirty rounds, option C. The curved box magazine is the familiar one of the weapon. The capacities of 20, 25 and 40 in options A, B and D are not those of the standard AK-47 magazine, although other drum or extended magazines exist.

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86.

Match the following :

List-IList-II
(a) Ram rod(i) Fired Bullet
(b) Chamber marks(ii) Shot gun
(c) Rifling mark(iii) Fired cartridge
(d) Choking of barrel(iv) Muzzle loader

Codes :
(a) (b) (c) (d)

Exam Year(s)

UGC NET - 2012,

Answer: D

The key gives (iv), (iii), (i), (ii), option D. A ram rod is a part of a muzzle loader, used to push the charge and bullet down the barrel. Chamber marks are left on a fired cartridge, rifling marks on a fired bullet, and the choking of the barrel is a feature of a shot gun, where the muzzle is narrowed to control the spread of shot. Options A, B and C pair these items with the wrong types of weapon or evidence.

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87.

Assertion (A) : The penetration power of shot gun is more than service rifle.

Reason (R) : Rifle produces more energy inside the barrel as compared to shot gun.

Exam Year(s)

UGC NET - 2012,

Answer: B

The assertion is wrong and the reason is correct, option B. A shot gun fires a charge of many small pellets, which lose energy quickly, so its penetration is less than that of a service rifle, which fires a single high velocity bullet. The reason is correct: a rifle generates greater energy in the barrel than a shot gun does, which is why its bullet penetrates more. Options A and C call the assertion correct, and option D calls the reason wrong.

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88.

The diameter of LG Pellet is

Exam Year(s)

UGC NET - 2012,

Answer: B

The key gives 0.35 inch (option B) for the diameter of an LG pellet. LG stands for large grain and is a buckshot size used in shot guns, with a diameter of about a third of an inch. The smaller figure of 0.25 inch in option A and the larger ones of 0.40 and 0.45 inch in options C and D are not the diameters the key accepts for this pellet.

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89.

Walker Test of GSR is done for the identification of presence of

Exam Year(s)

UGC NET - 2012,

Answer: D

The Walker test is done to identify the presence of nitrite, option D, in gunshot residue. The unburnt powder around a bullet hole is changed to nitrites by the burning, and the test uses a chemical paper that gives an orange colour with the nitrites. It does not test for metallic residue (A), which is the object of the paraffin or neutron activation methods, for nitrate (B) or for sulphur (C).

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90.

It is not the component of rifle Cartridge

Exam Year(s)

UGC NET - 2012,

Answer: D

The wad is not a component of a rifle cartridge, option D. A rifle cartridge consists of the case, the primer, the propellant and the projectile, a single bullet. A wad is a disc of felt, card or plastic used in a shotgun cartridge to separate the powder from the shot, so it belongs to shot gun cartridges and not to rifle ammunition. The cartridge case (A), the primer (B) and the projectile (C) are components of a rifle cartridge. A shot gun cartridge has a plastic or paper case, a primer, a propellant powder, a wad and a charge of pellets, so the wad belongs to it and not to a rifle cartridge.

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