Tenprint Fingerprint Certification Tenprint Fingerprint Ridge Detail & Pattern Types 2 — Questions and Answers
Question 1: What is the 'type line' in fingerprint pattern analysis?
- The innermost recurving ridge of a loop
- The two innermost ridges that parallel, diverge, and surround the pattern area (Correct answer)
- The first ridge above the core
- The ridge that connects the two deltas in a whorl
Correct answer: The two innermost ridges that parallel, diverge, and surround the pattern area
Type lines are the two innermost ridges that run roughly parallel, then diverge to enclose or surround the fingerprint pattern area.
Question 2: How is the ridge count determined for a loop pattern?
- Count all ridges within the pattern area
- Count ridges crossing an imaginary line from the core to the delta, not counting the core or delta ridges themselves (Correct answer)
- Count ridges from one delta to the other
- Count only bifurcations within the pattern area
Correct answer: Count ridges crossing an imaginary line from the core to the delta, not counting the core or delta ridges themselves
The ridge count is determined by counting ridges crossing an imaginary line drawn from the core to the delta, excluding both the core and the delta.
Question 3: What is the 'core' of a fingerprint pattern?
- The delta formation at the base of the pattern
- The approximate center of the fingerprint pattern, used as a reference point (Correct answer)
- The outermost ridge of the whorl
- The location where ridges originate from the lower phalange
Correct answer: The approximate center of the fingerprint pattern, used as a reference point
The core is the approximate center of the fingerprint pattern and is used, along with the delta, as a reference point for ridge counting and tracing.
Question 4: Which pattern type has no deltas and no recurving ridges?
- Loop
- Whorl
- Plain Arch (Correct answer)
- Central Pocket Loop
Correct answer: Plain Arch
A plain arch has no deltas and no recurving ridges — ridges flow smoothly from one side of the finger to the other in a wave shape.
Question 5: What is a 'short ridge' in ridge detail analysis?
- A ridge that begins and ends without connecting to other ridges, shorter than a normal ridge (Correct answer)
- The ridge at the very tip of the finger
- A ridge that forms a hook shape
- The first ridge above the delta
Correct answer: A ridge that begins and ends without connecting to other ridges, shorter than a normal ridge
A short ridge (also called an independent ridge) begins and terminates without connecting to other ridges and is shorter than the surrounding ridges.
Question 6: What is an 'enclosure' or 'lake' in fingerprint ridge detail?
- A ridge that splits into two then rejoins, enclosing a small space (Correct answer)
- The area within the whorl pattern
- An area where no ridges are present
- The space between two parallel ridges
Correct answer: A ridge that splits into two then rejoins, enclosing a small space
An enclosure (lake) is a ridge that splits, runs separately for a short distance, then rejoins, creating an enclosed oval or circular space.
Tenprint Fingerprint Certification Tenprint Fingerprint Ridge Detail & Pattern Types 2
What is the 'type line' in fingerprint pattern analysis?