1. Revolvers feature several firing chambers within a revolving
cylinder. a. True b. False
2. Shotguns feature a barrel with lands and grooves. a. True b.
False
3. The diameter of the shotgun barrel is expressed by the term
gauge. a. True b. False
4. The microscopic drill marks left on the barrel’s inner surface
are randomly irregular and serve to impart uniqueness to each
barrel. a. True b. False
5. Any contact between the tool and the marked surface may
alter the mark and will, at the least, raise serious questions
about the integrity of the evidence. a. True b. False