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45 Cards in this Set
- Front
- Back
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What is the most positive way to identify a person?
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Fingerprints
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When, if ever, do the friction ridges on a person's hands change during his/her lifetime?
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Never
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Which terms is NOT used in classifying or describing fingerprints?
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Tangent
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What term identifies fingerprints that spread apart at two ridges that have been running nearly parallel?
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Divergence
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The delta and core located within the pattern area of loops and whorls.
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Focal Points
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The forking or dividing of one ridge line into two or more branches.
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Bifurcation
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The points at which the recurring ridge of a loop-type pattern definitely turns inward or curves.
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Shoulders
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Pertaining to palm impressions of the hand.
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Palmar
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A point is a ridge characteristics formed by bifurcation, ridge ending or dot.
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True
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The two innermost ridges that start parallel, diverge, and tend to surround the entire pattern area are called type lines.
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True
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The term plantar pertains to sole impressions of the foot.
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True
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Prior to fingerprinting a subject, what is the first thing you should have the subject do?
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Sign the fingerprint card
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A good fingeprint impression should be what color?
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Dark gray
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What is the purpose for taking plain fingerprint impressions?
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To verify rolled impressions
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When a photographic fingerprint impression is being taken, the photographic paper should be placed in a fixing bath for approx. how many seconds?
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30 sec.
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What is the greatest problem with making palm prints?
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Palm prints are difficult to obtain due to the hollow in the palm.
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What is the best method to record palm prints?
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Use a tubular object wrapped with printing paper to roll the prints
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Which will result in poor fingerprint impressions?
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Failure to clean the inking apparatus.
Failure to clean the individual's fingers. Failure to roll fingers properly |
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Latent prints fall under a total of how many general classifications?
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Three
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What fingerprint powder has the advantage of showing up on either a dark or light background?
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Dragon's blood
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Which items should NOT be used to apply fingeprint powder?
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Tissue paper
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When using a short-wave ultraviolet light, the investigator should wear which apparel?
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Goggles and Protective Clothing
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What are the most common materials used for lifting latent fingerprints?
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Rubber lifters and tranparent lifting tapes.
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What type of tape is best for lifting prints located on curved or uneven surfaces?
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Rubber
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Fingerprints patterns have a total of how many basic classification designations?
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Three
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What fingerprint pattern has two or more deltas?
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Accidental whorls
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Patterns that flow toward the thumbs are known as what type of loops?
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Radial
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What Fingerprint loops flowing in the direction of the little fingers?
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Ulnar
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What type of pattern has the ridges forming concentric circles or spirals?
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Whorls
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A loop must have a total of how many essential characteristics?
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Three
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A positive impression made from a mold.
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Cast
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Anything making an impression.
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Object
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Any indentation from which a cast is made.
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Impression
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A negative impression.
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Mold
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What should be the first thing done to an impression found at a crime scene?
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Protected
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Spraying an impression with which of the following material will help to strengthen the impression to support the weight of the casting material?
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Shellac
Plastic spray Hair net spray |
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Usually how many coats of a spray material is sufficient to help support the weight of the casting material in sandy soils?
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3 to 10
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When plastic spray is used to help support the weight of the casting material, a thin mist of which materials should be allowed to settle on the print?
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Light Oil
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Reinforcement material should be added to the print after how much plaster has been laid?
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1/2 to 3/4 in.
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When added with the water used in making plaster, which of the following materials will hasten the setting?
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Salt
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When added with the water used in making plaster, which of the following materials will retard the setting 15 to 30 minutes?
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Borax
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It usually takes plaster how many minutes to harden after preparation?
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20 to 30 min.
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When casting under water and using plaster, how many parts of salt should be added to 10 to 12 parts of plaster to hasten the setting time?
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3 to 4
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Which casting materials is lighter than plaster of Paris, much more economical, and is highly recommended for use?
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Dental Stone
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Which casting materials may be used to obtain fingerprint impressions found in putty and caulking?
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Silicone Rubber
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