Forensic Ballistics: Ricochet, Dispersion and Accidental Discharge
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
24 May 2026
About this mock
UGC-NET Forensic Science Unit V hard-band drill on ricochet physics, shotgun pellet dispersion, and accidental-discharge mechanics. Calibrated scenario questions on the angle of incidence and angle of departure on hard surfaces, the critical angle above which a bullet penetrates rather than ricochets, lead and copper skid marks on impact surfaces, mushrooming and base deformation as ricochet indicators, and trace transfer to the substrate. The shotgun pattern segment covers cylinder, improved cylinder, modified, and full choke constrictions in thousandths of an inch, the 30-inch circle benchmark at 40 yards, and pattern density calculations for range estimation under Saferstein and Heard arithmetic. The accidental-discharge segment covers ANSI/SAAMI drop tests in the six standard attitudes, sear wear and sear engagement angle, hammer-block and transfer-bar safety mechanisms with the Ruger lineage, and double-action trigger-pull benchmarks and sear-release points across action types. The investigation segment covers scene reconstruction with trajectory rods and lasers, the reconciliation of witness statements with ballistic evidence, and expert opinion under Section 45 of the Indian Evidence Act 1872 and Section 39 of the Bharatiya Sakshya Adhiniyam 2023.
For MSc Forensic Science aspirants, NFSU PhD entrance candidates, UGC-NET Paper II Unit V test-takers, and ballistic-examiner trainees at central and state FSLs preparing for the case-reconstruction segment of the qualifying examination.
Topics covered:
- Ricochet physics: angle of incidence, angle of departure, critical angle, surface hardness
- Ricochet evidence: Pb and Cu skid marks, mushrooming, base deformation, trace transfer
- Shotgun choke types: cylinder, improved cylinder, modified, full, constriction values
- Pattern density calculations: 30-inch circle at 40 yards, range estimation arithmetic
- Accidental discharge: ANSI/SAAMI drop tests, sear wear, hammer block, transfer bar
- Double-action analysis: trigger pull weight, sear release point, safety failure modes
- Scene reconstruction: trajectory rods, laser methods, witness-evidence reconciliation
- Expert opinion under Section 45 IEA 1872 and Section 39 BSA 2023 on ballistic findings
Hard band; expect 30–40 percent accuracy on first attempt. Allow 30 minutes.
Sources & references
Questions in this mock are written and verified against the following sources. Citations are recorded per question and shown in the explanation after submission.
- cited in 23 questions
Heard, Brian J. — Handbook of Firearms and Ballistics, 2nd Edition (2008), Wiley-Blackwell
Chapter on Ricochet, sections on supra-critical penetration behaviour and bullet fragmentation patterns
- cited in 4 questions
Saferstein, Richard — Criminalistics: An Introduction to Forensic Science, 12th Edition
Chapter on Crime Scene Reconstruction, sections on trajectory rod insertion and laser-based reconstruction methods
- cited in 2 questions
DiMaio, Vincent J.M. — Gunshot Wounds, 3rd Edition
Chapter on Atypical Wounds, sections on keyhole entries from ricochet and tumbling bullets in flight
- cited in 1 question
Indian Evidence Act 1872, Section 45; Bharatiya Sakshya Adhiniyam 2023, Section 39
Section 45 IEA carried forward as Section 39 BSA on expert opinion in science; procedural complement at Section 293 CrPC and Section 329 BNSS
Open source
How our mocks are built
Questions are written and edited by the ForensicSpot team and cited from peer-reviewed forensic textbooks, official syllabi and primary case law. Each one is verified before publishing. Detailed explanations show after you submit, so the test stays a real test. See a mistake? Tell us.
Common questions
What does the Forensic Ballistics: Ricochet, Dispersion and Accidental Discharge mock cover?+
UGC-NET Forensic Science Unit V hard-band drill on ricochet physics, shotgun pellet dispersion, and accidental-discharge mechanics. Calibrated scenario questions on the angle of incidence and angle of departure on hard surfaces, the critical angle above which a bullet penetrates rather than ricochets, lead and copper skid marks on impact surfaces, mushrooming and base deformation as ricochet indicators, and trace transfer to the substrate. The shotgun pattern segment covers cylinder, improved cy
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: hard. Tier: Premium.
Who is this mock for?+
Forensic science students and aspirants who want timed, exam-style practice with explanations and verified source citations on Forensic Ballistics, NET. Useful for postgraduate entrance preparation and for BSc / MSc forensic students testing their recall under time.
Are the questions reviewed?+
Each question carries a verified source citation. Faculty review for individual questions is in progress.
Do I need an account to take this mock?+
Yes, a free ForensicSpot account is required to start a timed attempt — this lets you save progress, see per-question explanations after submission, and track your topic-level performance over time.