Arizona Forensic Science Technician
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
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1. A crime scene technician responds to a suspected homicide and
observes a large pool of blood near the victim. Which of the following
is the most appropriate first step when documenting the bloodstain
pattern?
A. Collect the blood samples immediately for presumptive testing.
B. Photograph the bloodstains with a scale and from multiple angles.
C. Document the pattern and appearance of the bloodstains through
detailed photography and notes prior to any collection.
D. Attempt to determine the blood type at the scene using field kits.
The initial priority in bloodstain pattern analysis is thorough
documentation through photographs and notes before any items are
disturbed or collected.
2. When collecting fingerprints at a crime scene, which technique is best
suited for lifting latent prints from a glass surface?
A. Ninhydrin spraying
B. Dusting with fingerprint powder and lifting with tape.
C. Iodine fuming
D. Cyanoacrylate fuming
Dusting with powder and lifting with tape is the standard method for
, visualizing and preserving latent prints on non-porous surfaces like
glass.
3. A forensic technician is processing a suspected arson scene. Which of
the following pieces of evidence is most critical for determining the
presence of an accelerant?
A. Charred wood samples
B. Debris from areas of deepest burning.
C. Pieces of burned plastic
D. Unburned structural materials
Collection of debris from the most heavily burned areas increases the
likelihood of detecting trace accelerants in laboratory analysis.
4. Chain of custody is essential in forensic evidence handling because it
ensures:
A. Evidence will not deteriorate.
B. The integrity and traceability of evidence from collection to court
presentation.
C. Only authorized personnel handle evidence.
D. Evidence is stored under proper temperature controls.
Maintaining a documented chain of custody verifies evidence has
been properly controlled and accounted for through all stages of
investigation and analysis.
5. A forensic technician finds a hair shaft at a crime scene. What
characteristic is most useful in determining whether the hair
originated from a human or animal?
A. Color of the hair
B. Length of the hair
C. Root shape
D. Medullary index and pattern.
The medullary index and pattern differ significantly between human
and animal hairs and are key to species determination.
6. During latent print development, a technician notices the print
appears reddish in color. Which chemical technique likely produced
this color?
A. Cyanoacrylate fuming alone
B. Silver nitrate application.
, C. Ninhydrin
D. Iodine fuming
Silver nitrate reacts with salt components in prints and produces a
dark or reddish stain upon exposure to light, indicating developed
ridges.
7. When collecting biological fluids, what is the best practice to avoid
contamination?
A. Collect fluids from the driest areas.
B. Wear new gloves for each item and package items individually.
C. Use the same swab for multiple spots to save time.
D. Allow items to dry completely before packaging.
Using fresh gloves and packaging items separately prevents
cross-contamination between samples.
8. A forensic technician is asked to document tire impressions at a scene.
What is the most effective method for preserving these impressions?
A. Spray paint residue
B. Photograph from a single angle
C. Take high-resolution photographs with scales from multiple
angles.
D. Cover the impression with plastic wrap
Detailed photography with scales from various angles preserves the
size and features of tire impressions without altering them.
9. In bloodstain pattern analysis, a high-velocity impact pattern is
typically characterized by:
A. Large, well-defined droplets
B. Medium droplets around 2–4 mm
C. Fine mist-like droplets less than 1 mm.
D. Spatter lines over 10 mm
High-velocity impact patterns, such as from gunshots, produce very
fine droplets under 1 mm in diameter.
10. Before applying chemical reagents to develop latent prints on
porous paper, a technician should:
A. Heat the paper to dry it
B. Ensure the surface is dry and free of excess contamination.
C. Spray water to reactivate residues
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. A crime scene technician responds to a suspected homicide and
observes a large pool of blood near the victim. Which of the following
is the most appropriate first step when documenting the bloodstain
pattern?
A. Collect the blood samples immediately for presumptive testing.
B. Photograph the bloodstains with a scale and from multiple angles.
C. Document the pattern and appearance of the bloodstains through
detailed photography and notes prior to any collection.
D. Attempt to determine the blood type at the scene using field kits.
The initial priority in bloodstain pattern analysis is thorough
documentation through photographs and notes before any items are
disturbed or collected.
2. When collecting fingerprints at a crime scene, which technique is best
suited for lifting latent prints from a glass surface?
A. Ninhydrin spraying
B. Dusting with fingerprint powder and lifting with tape.
C. Iodine fuming
D. Cyanoacrylate fuming
Dusting with powder and lifting with tape is the standard method for
, visualizing and preserving latent prints on non-porous surfaces like
glass.
3. A forensic technician is processing a suspected arson scene. Which of
the following pieces of evidence is most critical for determining the
presence of an accelerant?
A. Charred wood samples
B. Debris from areas of deepest burning.
C. Pieces of burned plastic
D. Unburned structural materials
Collection of debris from the most heavily burned areas increases the
likelihood of detecting trace accelerants in laboratory analysis.
4. Chain of custody is essential in forensic evidence handling because it
ensures:
A. Evidence will not deteriorate.
B. The integrity and traceability of evidence from collection to court
presentation.
C. Only authorized personnel handle evidence.
D. Evidence is stored under proper temperature controls.
Maintaining a documented chain of custody verifies evidence has
been properly controlled and accounted for through all stages of
investigation and analysis.
5. A forensic technician finds a hair shaft at a crime scene. What
characteristic is most useful in determining whether the hair
originated from a human or animal?
A. Color of the hair
B. Length of the hair
C. Root shape
D. Medullary index and pattern.
The medullary index and pattern differ significantly between human
and animal hairs and are key to species determination.
6. During latent print development, a technician notices the print
appears reddish in color. Which chemical technique likely produced
this color?
A. Cyanoacrylate fuming alone
B. Silver nitrate application.
, C. Ninhydrin
D. Iodine fuming
Silver nitrate reacts with salt components in prints and produces a
dark or reddish stain upon exposure to light, indicating developed
ridges.
7. When collecting biological fluids, what is the best practice to avoid
contamination?
A. Collect fluids from the driest areas.
B. Wear new gloves for each item and package items individually.
C. Use the same swab for multiple spots to save time.
D. Allow items to dry completely before packaging.
Using fresh gloves and packaging items separately prevents
cross-contamination between samples.
8. A forensic technician is asked to document tire impressions at a scene.
What is the most effective method for preserving these impressions?
A. Spray paint residue
B. Photograph from a single angle
C. Take high-resolution photographs with scales from multiple
angles.
D. Cover the impression with plastic wrap
Detailed photography with scales from various angles preserves the
size and features of tire impressions without altering them.
9. In bloodstain pattern analysis, a high-velocity impact pattern is
typically characterized by:
A. Large, well-defined droplets
B. Medium droplets around 2–4 mm
C. Fine mist-like droplets less than 1 mm.
D. Spatter lines over 10 mm
High-velocity impact patterns, such as from gunshots, produce very
fine droplets under 1 mm in diameter.
10. Before applying chemical reagents to develop latent prints on
porous paper, a technician should:
A. Heat the paper to dry it
B. Ensure the surface is dry and free of excess contamination.
C. Spray water to reactivate residues
