Match an item in one list with an item in the other :List IList II(a) Chocking(i) Abrasion collar(b) Dum-dum bullet(ii) Dispersion of pollets(c) Rifling(iii) Keyhole wound(d) Richochet bullet(iv) Greater wounding effect

The correct matching is (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii).Choking narrows the muzzle and controls the dispersion of pellets (ii).A dum-dum bullet has an exposed soft or hollow nose that expands on impact, giving a greater wounding effect (iv).Rifling spins the bullet, and the rotating bullet scrapes the skin margin as it enters, producing the abrasion collar of an entry wound (i).A ricochet bullet is deflected and arrives tilted or at a shallow angle, the kind of strike associated with irregular and keyhole wounds (iii).The other codes misplace at least choking, which is the only item that concerns pellets.

Forensic Ballistics Questions and Answers

Q: In test firing, the test pallets are obtained in :

Test bullets are obtained by firing into water.To compare a crime bullet with a suspected firearm, the examiner fires test shots from that weapon and recovers the bullets undamaged. A long water tank slows the bullet gradually without scratching it, so the rifling marks (lands, grooves and fine striations) are preserved for comparison under a comparison microscope.Cotton wool and rags were used in older bullet-recovery boxes but can leave abrasions and fibres on the bullet. Solid wax is not a standard recovery medium. The water tank is the method of choice in modern laboratories.

Q: Richochet means :

Ricochet means deflection of the bullet.A ricochet occurs when a bullet strikes a surface such as a road, wall or water at a shallow angle and glances off instead of penetrating. The bullet is often deformed and may tumble, so the wound it makes can be irregular, and the striking surface usually shows a ricochet mark whose angle helps reconstruct the shooting.A tampered bullet, blunting of the bullet and an unfired bullet describe the bullet's condition, not its path. Blunting may result from a ricochet, but it is not what the word means.

Q: Which is not called the country made firearms among the following :

The weapons not called country made are rifled firearms.Country-made (improvised) firearms are crude weapons made in small workshops from materials such as water pipe and scrap. They are usually smooth-bored single-shot guns, and include home-made firearms, pipe guns and zip guns. Cutting accurate rifling needs factory machinery, so these weapons almost never have it.Rifled firearms, with spiral grooves that spin the bullet, are products of regular manufacture, so they are the odd one out.

Q: Assertion (A) : Chocking reduces dispersion of pellets.Reason (R) : Constriction of barrel at muzzle end occurs in chocking.

The answer is Both (A) and (R) are true.Choke is a slight narrowing of a shotgun barrel at the muzzle end, so the reason is a correct description. As the shot charge passes through the constriction it is squeezed together, and the pellets leave in a tighter group, so the pattern spreads less at a given range. The assertion that choking reduces dispersion is therefore also true, and the constriction is indeed why.That rules out the options calling either statement, or both, false.

Q: Among the following techniques which one is not suitable method for detecting the gunshot residue ?

The unsuitable technique is pyrolysis GC.Gunshot residue is identified mainly from the primer elements lead, barium and antimony. Neutron activation analysis (NAA) and atomic absorption spectrometry (AAS) measure these elements in hand swabs, and scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX) finds the characteristic spherical particles containing all three, which is the preferred method today.Pyrolysis gas chromatography breaks down polymers by heat and separates the fragments, and is used for paints, fibres and plastics. It cannot detect the metallic elements of gunshot residue.

Q: The terminal ballistics is concerned with :

Terminal ballistics is concerned with the destructive effect on the target.Ballistics is divided into internal ballistics (from ignition until the projectile leaves the barrel), external ballistics (the flight through the air) and terminal ballistics (what happens when the projectile strikes its target). Terminal ballistics deals with penetration, energy transfer and the damage done; wound ballistics is its branch dealing with the body.Damage to the projectile, its angle of incidence and its remaining velocity are details studied along the way, but the subject's concern, the one the key names, is the effect on the target. Remaining velocity in flight belongs to external ballistics.

Q: "DRUGFIRE" system is associated with :

DRUGFIRE is a database of firing pin and primer impressions on spent cartridges.DRUGFIRE was the FBI's automated firearms identification system of the 1990s. It captured images of the breech face and firing pin marks on fired cartridge cases recovered from crime scenes, so that cases from different shootings fired in the same gun could be linked. It was later replaced by the NIBIN network using the IBIS system.Capturing and comparing bullet striations was the function of a different system, Bulletproof. Recovering cartridges and bullets is a crime scene task, and DRUGFIRE was a database, not a way of searching on 'the same computer system'.

In test firing, the test pallets are obtained in :

A.Solid wax
B.Rags
C.Cotton wool
D.Water

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: D

Test bullets are obtained by firing into water.

To compare a crime bullet with a suspected firearm, the examiner fires test shots from that weapon and recovers the bullets undamaged. A long water tank slows the bullet gradually without scratching it, so the rifling marks (lands, grooves and fine striations) are preserved for comparison under a comparison microscope.

Cotton wool and rags were used in older bullet-recovery boxes but can leave abrasions and fibres on the bullet. Solid wax is not a standard recovery medium. The water tank is the method of choice in modern laboratories.

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Richochet means :

A.Tampered bullet
B.Blunting of the bullet
C.Unfired bullet
D.Deflection of the bullet

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: D

Ricochet means deflection of the bullet.

A ricochet occurs when a bullet strikes a surface such as a road, wall or water at a shallow angle and glances off instead of penetrating. The bullet is often deformed and may tumble, so the wound it makes can be irregular, and the striking surface usually shows a ricochet mark whose angle helps reconstruct the shooting.

A tampered bullet, blunting of the bullet and an unfired bullet describe the bullet's condition, not its path. Blunting may result from a ricochet, but it is not what the word means.

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Which is not called the country made firearms among the following :

A.Home made firearm
B.Pipe guns
C.Rifled firearms
D.Zip guns

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: C

The weapons not called country made are rifled firearms.

Country-made (improvised) firearms are crude weapons made in small workshops from materials such as water pipe and scrap. They are usually smooth-bored single-shot guns, and include home-made firearms, pipe guns and zip guns. Cutting accurate rifling needs factory machinery, so these weapons almost never have it.

Rifled firearms, with spiral grooves that spin the bullet, are products of regular manufacture, so they are the odd one out.

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Assertion (A) : Chocking reduces dispersion of pellets.
Reason (R) : Constriction of barrel at muzzle end occurs in chocking.

A.Both (A) and (R) are true
B.Both (A) and (R) are false
C.(A) is true but (R) is false
D.(A) is false but (R) is true

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: A

The answer is Both (A) and (R) are true.

Choke is a slight narrowing of a shotgun barrel at the muzzle end, so the reason is a correct description. As the shot charge passes through the constriction it is squeezed together, and the pellets leave in a tighter group, so the pattern spreads less at a given range. The assertion that choking reduces dispersion is therefore also true, and the constriction is indeed why.

That rules out the options calling either statement, or both, false.

Discuss in Forum

Among the following techniques which one is not suitable method for detecting the gunshot residue ?

A.NAA
B.AAS
C.SEM
D.Pyrolysis GC

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: D

The unsuitable technique is pyrolysis GC.

Gunshot residue is identified mainly from the primer elements lead, barium and antimony. Neutron activation analysis (NAA) and atomic absorption spectrometry (AAS) measure these elements in hand swabs, and scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX) finds the characteristic spherical particles containing all three, which is the preferred method today.

Pyrolysis gas chromatography breaks down polymers by heat and separates the fragments, and is used for paints, fibres and plastics. It cannot detect the metallic elements of gunshot residue.

Discuss in Forum

Match an item in one list with an item in the other :

List I	List II
(a) Chocking	(i) Abrasion collar
(b) Dum-dum bullet	(ii) Dispersion of pollets
(c) Rifling	(iii) Keyhole wound
(d) Richochet bullet	(iv) Greater wounding effect

A.(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
B.(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
C.(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
D.(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: A

The correct matching is (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii).

Choking narrows the muzzle and controls the dispersion of pellets (ii).
A dum-dum bullet has an exposed soft or hollow nose that expands on impact, giving a greater wounding effect (iv).
Rifling spins the bullet, and the rotating bullet scrapes the skin margin as it enters, producing the abrasion collar of an entry wound (i).
A ricochet bullet is deflected and arrives tilted or at a shallow angle, the kind of strike associated with irregular and keyhole wounds (iii).

The other codes misplace at least choking, which is the only item that concerns pellets.

Discuss in Forum

The terminal ballistics is concerned with :

A.the destructive effect on the target
B.the damage suffered by the projectile
C.the angle of incidence at which the projectile hits
D.the determination of the terminal or remaining velocity of the projectile

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: A

Terminal ballistics is concerned with the destructive effect on the target.

Ballistics is divided into internal ballistics (from ignition until the projectile leaves the barrel), external ballistics (the flight through the air) and terminal ballistics (what happens when the projectile strikes its target). Terminal ballistics deals with penetration, energy transfer and the damage done; wound ballistics is its branch dealing with the body.

Damage to the projectile, its angle of incidence and its remaining velocity are details studied along the way, but the subject's concern, the one the key names, is the effect on the target. Remaining velocity in flight belongs to external ballistics.

Discuss in Forum

"DRUGFIRE" system is associated with :

A.Database of firing pin and primer impression on spent cartridges
B.Recovery of cartridge and bullet
C.Capture and rapidly compare bullet stria
D.Searching of bullets or cartridges using the same computer system

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: A

DRUGFIRE is a database of firing pin and primer impressions on spent cartridges.

DRUGFIRE was the FBI's automated firearms identification system of the 1990s. It captured images of the breech face and firing pin marks on fired cartridge cases recovered from crime scenes, so that cases from different shootings fired in the same gun could be linked. It was later replaced by the NIBIN network using the IBIS system.

Capturing and comparing bullet striations was the function of a different system, Bulletproof. Recovering cartridges and bullets is a crime scene task, and DRUGFIRE was a database, not a way of searching on 'the same computer system'.

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GSR collection from live subjects should be done within :

A.12 hours
B.2 hours
C.6 hours
D.24 hours

Exam Year(s)

MH SET - 2019, SET Exam - 2019,

Answer: C

Gunshot residue should be collected from a living subject within 6 hours of the shooting.

Residue particles of lead, barium and antimony sit loosely on the skin of the hands. Ordinary activity, rubbing, wiping and hand washing remove them steadily, so the chance of finding any falls sharply with time, and after about six hours a negative result means very little. Swabbing or stubbing the hands is therefore done as early as possible, and the hands may be bagged until then.

Two hours is an ideal target rather than the accepted limit. Twelve and 24 hours are far beyond the period in which residue normally survives on a living, active person.

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10.

Which of the following can be tailor made to suit the ballistics of a particular firearm ?

A.Dense powder
B.Bulk powder
C.Progressive powder
D.Black powder

Exam Year(s)

MH SET - 2019, SET Exam - 2019,

Answer: C

The powder that can be tailor made to suit a particular firearm is progressive powder.

A progressive burning powder is designed so that its rate of gas production rises as the bullet moves down the barrel. Its grain size, shape (multi-perforated grains whose burning surface grows) and surface coatings of deterrent can be chosen to match the barrel length, calibre and projectile weight of a given weapon, which is what 'tailor made to its ballistics' means.

Black powder is a fixed mixture of charcoal, sulphur and saltpetre and burns degressively. Dense and bulk powders are classes of smokeless powder by their loading density, not powders engineered for one firearm.

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