SUPA Forensics Final Exam Review
UPDATED ACTUAL Questions and
CORRECT Answers
What is gunshot residue testing used for? - CORRECT ANSWER To determine if an
individual fired a gun or for distance determination.
What does the Sodium Rhodizinate test for in gunshot residue analysis? - CORRECT
ANSWER The presence of lead or barium.
What does the Griess test detect? - CORRECT ANSWER The presence of nitrites.
What is the purpose of using paraffin wax in gunshot residue testing? - CORRECT
ANSWER To detect nitrites and nitrates from gunpowder, though false positives can occur
from household items.
What tool is used to analyze gunshot residue at a microscopic level? - CORRECT
ANSWER Scanning electron microscope.
What are the two casting methods mentioned for toolmarks? - CORRECT
ANSWER Silicone for metal etches and dental molds for tire tracks or shoe prints.
Why are bite marks considered unreliable in forensic analysis? - CORRECT
ANSWER They do not provide consistent or reliable results.
What is the purpose of serial number restoration in forensics? - CORRECT ANSWER To
reveal altered serial numbers using methods like Magnaflux or Acid Etching.
What is Magnaflux used for in serial number restoration? - CORRECT ANSWER It uses
magnetic properties for non-destructive testing.
, How does Acid Etching work in restoring serial numbers? - CORRECT ANSWER It uses
acid to eat away at the upper layer of an altered number to reveal the impressed patterns
underneath.
What is the formula for calculating density? - CORRECT ANSWER Density =
mass/volume.
What is an intensive property in the context of physical properties of glass? - CORRECT
ANSWER A property that does not change regardless of the amount of substance.
What is the definition of refractive index? - CORRECT ANSWER The bending of light
waves as they pass through different media.
What does birefringence refer to in glass analysis? - CORRECT ANSWER The difference
in two refractive index angles, which helps identify crystals.
What is Snell's Law? - CORRECT ANSWER n1sin Ө1 = n2sin Ө2, used for calculating
the refractive index.
What are amorphous solids? - CORRECT ANSWER Materials with a random arrangement
of particles, such as glass.
What is borosilicate glass known for? - CORRECT ANSWER It has Boron oxide added
for strength at high heat and is commercially known as Pyrex.
What characteristic does tempered glass have? - CORRECT ANSWER It fractures into
relatively harmless fragments when broken due to stress introduced by rapid heating and cooling.
UPDATED ACTUAL Questions and
CORRECT Answers
What is gunshot residue testing used for? - CORRECT ANSWER To determine if an
individual fired a gun or for distance determination.
What does the Sodium Rhodizinate test for in gunshot residue analysis? - CORRECT
ANSWER The presence of lead or barium.
What does the Griess test detect? - CORRECT ANSWER The presence of nitrites.
What is the purpose of using paraffin wax in gunshot residue testing? - CORRECT
ANSWER To detect nitrites and nitrates from gunpowder, though false positives can occur
from household items.
What tool is used to analyze gunshot residue at a microscopic level? - CORRECT
ANSWER Scanning electron microscope.
What are the two casting methods mentioned for toolmarks? - CORRECT
ANSWER Silicone for metal etches and dental molds for tire tracks or shoe prints.
Why are bite marks considered unreliable in forensic analysis? - CORRECT
ANSWER They do not provide consistent or reliable results.
What is the purpose of serial number restoration in forensics? - CORRECT ANSWER To
reveal altered serial numbers using methods like Magnaflux or Acid Etching.
What is Magnaflux used for in serial number restoration? - CORRECT ANSWER It uses
magnetic properties for non-destructive testing.
, How does Acid Etching work in restoring serial numbers? - CORRECT ANSWER It uses
acid to eat away at the upper layer of an altered number to reveal the impressed patterns
underneath.
What is the formula for calculating density? - CORRECT ANSWER Density =
mass/volume.
What is an intensive property in the context of physical properties of glass? - CORRECT
ANSWER A property that does not change regardless of the amount of substance.
What is the definition of refractive index? - CORRECT ANSWER The bending of light
waves as they pass through different media.
What does birefringence refer to in glass analysis? - CORRECT ANSWER The difference
in two refractive index angles, which helps identify crystals.
What is Snell's Law? - CORRECT ANSWER n1sin Ө1 = n2sin Ө2, used for calculating
the refractive index.
What are amorphous solids? - CORRECT ANSWER Materials with a random arrangement
of particles, such as glass.
What is borosilicate glass known for? - CORRECT ANSWER It has Boron oxide added
for strength at high heat and is commercially known as Pyrex.
What characteristic does tempered glass have? - CORRECT ANSWER It fractures into
relatively harmless fragments when broken due to stress introduced by rapid heating and cooling.
