RPSC SSO 2019 Paper Ballistic Part C Forensic Science

RPSC Senior Scientific Officer Ballistic Paper 2019 – Part C Forensic Science
Total Questions – 100 Duration – Two hours
No. of questions from Forensic Science – 40 Nos.

The Groove to Groove diameter inside a rifled barrel is called
(a) Muzzle
(b) Twist
(c) Caliber
(d) Helix

Backward movement of firearm during firing is called
(a) Pull back
(b) Recoil
(c) Bubbling
(d) Jump

The function of a primer is
(a) To save the firearm from corrosion
(b) To provide lubrication
(c) To ignite the propellant charge
(d) To propel the bullet

Which of the following is an ingredient of priming mixture loaded in small arm ammunition?
(a) TNT
(b) Nitrocellulose
(c) Lead styphnate
(d) Tetryl

The blac powder consists of potassium nitrate, charcoal and sulphur in which of the following proportions?
(a) 75:10:15
(b) 15:10:75
(c) 10:75:15
(d) 75:15:10

Which of the following is semi-smokeless powder?
(a) Nitroglycerine and black powder
(b) Nitrocellulose and nitroglycerine
(c) Nitrocellulose
(d) Nitrocellulose and black powder

The construction which reduces the diameter of barrel near muzzle end is called
(a) Choke
(b) Leed
(c) Breech
(d) Land

Generally, a groove is provided around the cylinderical portion of an elongated bullet. Which of the following is its purpose?
(a) To increase the range of bullet
(b) To make the bullet stable in its flight
(c) To crimp the bullet with cartridge case
(d) To make the bullet lose more energy inside human body

Which of the following are taken into consideration to estimate range of firing?
(a) Scorching, blackening, tattooing around gun shot holes/ wounds
(b) Direction of margins of gun-shot holes/ wounds
(c) Presence of blood of victim at scene of crime
(d) Deposition of mercury in barrel

Lead in Gunshot residue is best identified by
(a) IR photometry
(b) Dermal nitrate test
(c) Soft X-Ray radiography
(d) Neutron activation analysis