Tenprint Fingerprint Certification Tenprint Fingerprint Ridge Detail & Pattern Types 1 — Questions and Answers
Question 1: Which of the three basic fingerprint pattern types is characterized by ridges that enter and exit from the same side of the finger?
- Whorl
- Arch
- Loop (Correct answer)
- Tented Arch
Correct answer: Loop
A loop pattern has ridges that enter from one side, curve back, and exit from the same side, with one delta and a core.
Question 2: What is the term for a loop whose ridges flow toward the little finger side of the hand?
- Radial loop
- Ulnar loop (Correct answer)
- Plain loop
- Double loop
Correct answer: Ulnar loop
An ulnar loop opens toward the ulnar (little finger) side of the hand, which is the most common loop pattern type.
Question 3: What distinguishes a plain arch from a tented arch?
- Plain arches have a delta; tented arches do not
- Tented arches have an upthrust, angle, or two of the three loop requirements; plain arches have a smooth wave (Correct answer)
- Plain arches only appear on thumbs; tented arches appear on all fingers
- Tented arches require ridge counting; plain arches do not
Correct answer: Tented arches have an upthrust, angle, or two of the three loop requirements; plain arches have a smooth wave
A tented arch has a pronounced upthrust in the ridges, a sharp angle, or two of the three characteristics of a loop, while a plain arch flows smoothly.
Question 4: How many deltas does a plain whorl have?
- None
- One
- Two (Correct answer)
- Three or more
Correct answer: Two
A plain whorl has two deltas and at least one ridge that makes a complete circuit around the core.
Question 5: What is a 'delta' in fingerprint science?
- The core of the fingerprint pattern
- A triangular formation of ridges, rod, or dot at the point of pattern divergence (Correct answer)
- A type of arch pattern
- The area between two whorls
Correct answer: A triangular formation of ridges, rod, or dot at the point of pattern divergence
A delta is the triangular ridge formation where ridges from three different directions converge, marking the boundary of the pattern area.
Question 6: Which whorl subtype contains two separate loop formations, each with its own core and shoulders, arranged within the whorl?
- Plain whorl
- Central pocket loop whorl
- Double loop whorl (Correct answer)
- Accidental whorl
Correct answer: Double loop whorl
A double loop whorl consists of two distinct loop formations, each with its own shoulders and core, swirled together within the pattern.
Tenprint Fingerprint Certification Tenprint Fingerprint Ridge Detail & Pattern Types 1
Which of the three basic fingerprint pattern types is characterized by ridges that enter and exit from the same side of the finger?