IAI Latent CSI Certification Exam
Set Questions With Revised
Correct Detailed Answers
|Guarantee Pass!!
1. Core - ANSWER approximate center of a fingerprint pattern
2. Point of divergence - ANSWER the spot where two type lines cease to
run parallel to each other
3. Delta - ANSWER The point on a friction ridge at or nearest to the point
of divergence of two type lines, and located at or directly in front of the
point of divergence. Also known as a tri-radius.
4. Secondary crease - ANSWER other creases on the hand (sometimes
coming with age) that obscure the fingerprint ridge detail
5. Formation - ANSWER the manner in which a thing is formed, i.e. its
structure; includes ending ridges, bifurcations, and dots
6. Ending ridge - ANSWER a single friction ridge that terminates within
the friction ridge structure
, 7. Bifurcation - ANSWER the point at which one friction ridge divides into
two friction ridges
8. Dot - ANSWER an isolated friction ridge unit whose length
approximates its width in size
9. Radial - ANSWER towards the radius bone in the wrist; towards the
thumb
10. Ulnar - ANSWER towards the ulna bone in the wrist; towards the little
finger
11. Plain Arch - ANSWER friction ridges enter on one side of the
impression and flow, or tend to flow, out the other side with a rise or wave
in the center
12. Tented Arch - ANSWER possesses either an angle, an upthrust, or two
of the three basic characteristics of the loop
13. Loop - ANSWER one or more friction ridges enters an area, recurves, and
flows out the same side it entered; can be slanted to the right or to the left, and
can be designated radial or ulnar
14. Sufficient recurve - ANSWER the space between the shoulders of a loop
free of any appendages which abut upon it at a right angle on the outside of the
recurve
,15. Ridge count - ANSWER a line drawn from the delta to the core must cross
at least one line, not counting the delta or the core
16. Whorl - ANSWER two deltas and a recurve in front of each; can be spiral,
oval, circular, or any variant of a circle
17. Plain Whorl - ANSWER one or more friction ridges that make, or tend to
make, a complete circuit, with two deltas, between which, when an imaginary line
is drawn, at lease one recurving friction ridge within the inner pattern is touched
or cut
18. Central Pocket Loop whorl - ANSWER two deltas and at least one friction
ridge that makes or tends to make a complete circuit, which may be spiral, oval,
circular, or any variant of a circle; an imaginary line drawn between the two deltas
must not touch or cross and recurving ridges, and an imaginary line from the delta
closest to the core through the core must not cross any appendages exiting the
recurving edges or the recurve is spoiled; if it is a straight line, the imaginary line
of flow must cross it at a right angle - otherwise it is a loop
19. Double loop whorl - ANSWER two seperate loop formations with two
seperate and distinct sets of shoulders and deltas; if it is S-shaped, or intertwined,
it is a plain whorl
20. Accidental Whorl - ANSWER a combination of two different types of
pattern, with the exception of the plain arch, with two or more deltas; a pattern
that possesses some of the requirements for two or more different types; or a
pattern which conforms to none of the definitions
, Tracing (Whorl classification) - ANSWER Ridge flow between left & right
deltas.
Follow ridge path of/below the left delta, moving towards the right, and dropping
down to the next ridge as ridge endings occur. When parallel to opening of right
delta, perform a ridge count.
Inner = Three or more ridges inside the right delta
Outer = Three or more ridges outside the right delta
Meet = Two ridges or less on either side of the right delta
(NCIC= PI, PO, PM, DI, DO, DM, CI, CO, CM, XI, XO, XM)
Carpal Delta - ANSWER area of the palm containing a delta formation most
commonly located near the wrist. (high carpal delta = mid palm)
Thenar - ANSWER Section of the palm located at the base of the thumb.
What sequence of latent print development techniques are used to develop prints
from porous materials? - ANSWER DFO, Ninhydrin, Physical Developer
The final purple colored compound usually produced with the treatment of
Ninydrin is called: - ANSWER Ruhemann's Purple
What latent print development technique is used to process nonporous materials
that are wet? - ANSWER Small Particle Reagent
