Examination Practice Test Questions With
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Rationales 2026 Q&A | Instant Download Pdf
1. Which fingerprint pattern is characterized by ridges entering from
one side, forming a loop, and exiting on the same side?
A. Arch
B. Whorl
C. Loop
D. Composite
Answer: C. Loop
Rationale: A loop pattern consists of ridges that enter from one
side, curve around, and exit the same side. It is the most
common fingerprint pattern encountered in forensic analysis.
2. What is the primary purpose of ridgeology in fingerprint analysis?
A. To determine DNA sequences
B. To analyze ridge characteristics for identification
, C. To measure skin thickness
D. To classify blood types
Answer: B. To analyze ridge characteristics for identification
Rationale: Ridgeology focuses on the uniqueness of friction ridge
formations to establish identity through comparison and
classification.
3. The point where a ridge splits into two is known as:
A. Ridge ending
B. Bifurcation
C. Delta
D. Core
Answer: B. Bifurcation
Rationale: A bifurcation is a ridge detail where a single ridge
divides into two separate ridges, an important feature in
fingerprint comparison.
4. Which surface is MOST suitable for latent fingerprint development
using powder?
A. Wet glass
B. Rough fabric
, C. Smooth, non-porous surfaces
D. Soil
Answer: C. Smooth, non-porous surfaces
Rationale: Fingerprint powder adheres best to smooth, non-
porous surfaces such as glass, plastic, and metal.
5. What is the core of a fingerprint?
A. The outer edge of the print
B. The center of the loop or whorl pattern
C. The ridge ending point
D. The delta region
Answer: B. The center of the loop or whorl pattern
Rationale: The core is the central area of a fingerprint pattern
and serves as a reference point in classification.
6. Which chemical method is commonly used for latent fingerprints
on porous surfaces?
A. Ninhydrin
B. Superglue fuming
C. Powder dusting
D. Laser scanning
, Answer: A. Ninhydrin
Rationale: Ninhydrin reacts with amino acids in sweat, making it
effective for developing prints on porous materials like paper.
7. A whorl pattern typically contains how many deltas?
A. None
B. One
C. Two
D. Three or more
Answer: C. Two
Rationale: Whorl patterns generally contain two deltas, which
help distinguish them from loops and arches.
8. Which type of fingerprint is least common in the general
population?
A. Loop
B. Whorl
C. Arch
D. Plain ridge
Answer: C. Arch