Forensic Ballistics: Range of Firing Determination
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
24 May 2026
About this mock
UGC-NET Forensic Science Unit V drill on the determination of range of firing from gunshot wound and clothing examination. Covers the four classical range categories (contact, close, intermediate and distant), the morphological features that anchor each band (muzzle imprint and stellate tearing for contact, soot deposition and powder tattooing for close, partial powder with no soot for intermediate, only an entrance abrasion collar for distant), and the chemical confirmation tests (Walker test for nitrites from partially burnt propellant, modified Griess test on filter paper with sulphanilic acid and N-1-naphthylethylenediamine for nitrites, sodium rhodizonate for lead residues, dithiooxamide for copper from jacketed-bullet residue). The intermediate-range cut-offs follow DiMaio's classification, with close range under about 60 cm, intermediate from 60 cm to roughly 1 m, and distant beyond the powder reach of the cartridge. The mock also covers the test-firing reconstruction workflow: use the suspect weapon and ammunition of the same lot, build a comparison panel of patterns at known distances, and bracket the questioned wound between two adjacent panels.
Targeted at MSc and BSc Forensic Science students preparing for UGC-NET Paper II Unit V, NFSU MSc Forensic Ballistics entrance, and FACT applied modules, the mock is also useful for police investigators handling gunshot fatalities and for medico-legal autopsy surgeons who write range opinions for the trial court.
Topics covered:
- Range categories: contact, close (under 60 cm), intermediate, distant
- Contact wound features: muzzle imprint, stellate tearing, blackening
- Close-range features: soot, powder tattooing, abraded collar
- Intermediate range: partial powder, single unburnt grains, no soot
- Distant range: only entry abrasion collar, no soot or tattooing
- Walker test, modified Griess test, sodium rhodizonate, dithiooxamide
- Test-firing reconstruction with comparison panels at known distances
- Bracketing the questioned wound between two adjacent comparison panels
Useful for self-assessment before a deeper Unit V revision push. 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 17 questions
DiMaio V J M, Gunshot Wounds: Practical Aspects of Firearms, Ballistics and Forensic Techniques, 3rd edition, CRC Press
Chapter 4: distant range diagnosis from combined absence of residue on skin and clothing, only abrasion collar
- cited in 9 questions
Heard B J, Handbook of Firearms and Ballistics, 2nd edition, Wiley-Blackwell
Chapter on range determination: revolver cylinder-to-barrel gap as additional source of lateral residue at discharge
- cited in 3 questions
Saferstein R, Criminalistics: An Introduction to Forensic Science, 12th edition, Pearson
Chapter 18: sodium rhodizonate for lead residue on fabric, pink-red complex, blue-violet on acid confirmation
- cited in 1 question
Schwoeble A J and Exline D L, Current Methods in Forensic Gunshot Residue Analysis, CRC Press
Chapter on chemical tests: dithiooxamide for copper jacket residue, dark-green to black complex
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: Range of Firing Determination mock cover?+
UGC-NET Forensic Science Unit V drill on the determination of range of firing from gunshot wound and clothing examination. Covers the four classical range categories (contact, close, intermediate and distant), the morphological features that anchor each band (muzzle imprint and stellate tearing for contact, soot deposition and powder tattooing for close, partial powder with no soot for intermediate, only an entrance abrasion collar for distant), and the chemical confirmation tests (Walker test f
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: medium. 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.