Unit 1: Dermatoglyphics - Practice Quiz

1 What is a rolled impression in fingerprinting?

2 A plain (or slap) impression is recorded by:

3 Which substance is traditionally used to record inked fingerprint impressions on a card?

4 The standard fingerprint card used for recording all ten fingers is commonly called the:

5 The Henry Classification System was developed primarily to:

6 In the Henry Classification System, only which pattern type is assigned a numerical value?

7 The primary classification in the Henry system is expressed as a:

8 When computing the Henry primary classification, what constant number is added to both the numerator and denominator?

9 Which of the following is one of the three basic fingerprint pattern types?

10 Approximately what percentage of all fingerprints are loops?

11 A delta in a fingerprint is best described as:

12 A loop that opens toward the little finger side is called a:

13 How many deltas does a typical whorl pattern have?

14 Which fingerprint pattern has no delta and no core?

15 A latent fingerprint is one that is:

16 Which is the most common physical method for developing latent prints on smooth, non-porous surfaces?

17 After dusting a latent print with powder, the print is usually preserved by:

18 Magnetic powder is applied to latent prints using a:

19 Ninhydrin is a chemical reagent that reacts with which component of a latent print?

20 Which chemical method uses superglue vapor to develop latent prints on non-porous surfaces?

21 While recording a rolled impression, an examiner rolls the finger from nail edge to nail edge. What is the primary reason for using this full nail-to-nail rolling motion?

22 An examiner obtains fingerprint cards where the impressions are smudged and the ridges appear as solid black blobs. Which recording error most likely caused this?

23 Plain (or 'slap') impressions are taken at the bottom of a ten-print card primarily to serve what verification purpose?

24 In Henry's Classification System, numerical values are assigned to fingers bearing whorls. What value is assigned to a whorl found on the right index finger?

25 A set of fingerprints shows whorls only on both thumbs. Using the Henry primary classification formula, what would the primary ratio be?

26 In the Henry primary classification, why is the value 1 added to both the numerator and the denominator?

27 The Henry system divides the ten fingers into five pairs with descending values. Which pair carries the value of 4?

28 A fingerprint pattern has ridges entering on one side, recurving, and exiting on the same side, with one delta present. What pattern is this?

29 An examiner draws an imaginary line between the two deltas of a whorl and finds that a recurving ridge in front of the inner delta is not cut by this line. How is this pattern classified?

30 Which fingerprint pattern is characterized by a slight upward thrust or rise at the center of ridges but lacks a true delta and recurving ridges?

31 A radial loop on the right hand is one in which the loop opens toward which direction?

32 An accidental whorl is best identified when a fingerprint contains which of the following?

33 When developing a latent print on a non-porous surface such as glass using powder, why does the powder adhere to the latent print?

34 An investigator needs to develop a latent print on a dark-colored surface. Which powder choice would provide the best contrast?

35 Magnetic powder applied with a magnetic wand offers what specific advantage over conventional brush-applied powder?

36 The Small Particle Reagent (SPR) method is particularly useful for developing latent prints in what specific situation?

37 Ninhydrin is a commonly used chemical reagent for developing latent prints on porous surfaces. It reacts with which component of the fingerprint residue?

38 During cyanoacrylate (superglue) fuming, the fumes polymerize on the latent print. On what type of surface is this technique most effective?

39 An investigator wants to develop latent prints on a paper document that may have been wet, where amino acids could be washed away. Which reagent targeting a different residue component would be a suitable choice?

40 After cyanoacrylate fuming produces a faint white print, an examiner applies a fluorescent dye stain and views it under an alternate light source. What is the purpose of this additional step?

41 In the Henry classification system, the primary classification is derived as a fraction. If whorls appear on the right index, right ring, and left middle fingers, what is the resulting primary classification value?

42 A subject has whorls on all ten fingers. What is the primary classification fraction assigned in the Henry system?

43 The maximum possible number of distinct primary classification groupings in Henry's system is:

44 During ridge counting of a loop pattern, a technician must count ridges between two specific reference points. Which points are used?

45 A print shows two deltas and a recurving ridge that does not pass between the two deltas but is intersected by an imaginary line connecting them. This pattern is most accurately classified as a:

46 For a pattern to be classified as a plain arch rather than a tented arch, which condition must hold?

47 In a radial loop on the right hand, the loop opens toward the:

48 Why are rolled impressions preferred over plain impressions for the purpose of Henry classification?

49 A rolled impression appears too dark with filled valleys and merged ridges. The most likely cause is:

50 Plain (simultaneous) impressions on a ten-print card serve primarily to:

51 When developing latents on a non-porous surface with powder, why does the powder adhere to the latent residue?

52 Small Particle Reagent (SPR) is especially suited for developing latent prints on:

53 In vacuum metal deposition (VMD), the sequence of metals typically deposited to visualize latent prints is:

54 Magnetic powder applied with a magnetic wand offers an advantage over conventional brushing because it:

55 Ninhydrin develops latent prints by reacting with which component of print residue, producing a characteristic color?

56 Cyanoacrylate (superglue) fuming develops latent prints because the monomer:

57 In the DFO (1,8-diazafluoren-9-one) technique, developed prints are best visualized by:

58 When processing a porous item (paper) with both DFO and ninhydrin, the correct sequence is:

59 Physical Developer (PD) is chosen over ninhydrin for a porous item primarily when the item has been:

60 After cyanoacrylate fuming, applying a fluorescent dye stain such as Rhodamine 6G is done to: