Tenprint Fingerprint Certification Tenprint Fingerprint Ridge Detail & Pattern Types

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?

Accepted Answer

Loop

Answer

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?

Accepted Answer

Ulnar loop

Answer

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?

Accepted Answer

Tented arches have an upthrust, angle, or two of the three loop requirements; plain arches have a smooth wave

Answer

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?

Accepted Answer

Two

Answer

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?

Accepted Answer

A triangular formation of ridges, rod, or dot at the point of pattern divergence

Answer

A delta is the triangular ridge formation where ridges from three different directions converge, marking the boundary of the pattern area.

Tenprint Fingerprint Certification Practice Test

Tenprint Fingerprint Certification Practice Test

Tenprint Fingerprint Certification Tenprint Fingerprint Ridge Detail & Pattern Types