FIS 201 Exam 3 WVU Questions with Correct Answers Latest Update 2025/2026
sweat and sebum are secreted by pores and spreads along skin ridges that are deposited upon
contact - Answers how are fingerprints made?
-on hands and soles of feet
-consistent throughout life - Answers friction ridges
-they don't change on their own
-damage must be done to the dermal layer of skin (burns, scars) - Answers can fingerprints
change over a lifetime?
-prints unable to be seen
-require enhancement (powders, chemicals, light) - Answers latent fingerprints
-prints able to be seen
-don't require enhancement
-created by sticky low-flow materials (blood, ink, grease) - Answers patent fingerprints
3D capture of a print in soft, fine-grained materials - Answers plastic impression
paper, cardboard - Answers porous substrates
metal, plastic, glass - Answers nonporous substrates
-targets nonporous substrates
-dust sticks to sebum on fingerprints - Answers fingerprint dusting
areas most likely to have been touched by the suspect
-door handles/frames
-windows
-furniture/appliances
-vehicles - Answers fingerprint target locations
1. photograph the dusted print
2. press fingerprint lifting tape across the print
3. gently smooth tape flat
, 4. lift off the print
5. press it over a lift card - Answers steps to lift a print
-smaller, high touch objects
-smooth, dry shapes
-all porous materials - Answers evidence collected at crime scenes
10 print card of rolled fingerprints from a known human - Answers fingerprint exemplar
chemical name for superglue - Answers cyanoacrylate
-enhancement and protection of latent fingerprints on nonporous substrates
-forms a plastic polymer built up from the print - Answers cyanoacrylate fuming
fumes bind to fats in the presence of water - Answers what do cyanoacrylate esters stick to on
a fingerprint?
-detection on porous substrates only
-forms "Ruhemann's purple" - Answers ninhydrin
reacts with amino acids in sweat - Answers what does ninhydrin react with on a fingerprint?
purple dye that works well to enhance fingerprints on clear tape - Answers gentian violet
works on formerly wet substrates - Answers small particle reagent (SPR)
molybdenum disulfide particles react with lipid components - Answers what does SPR react
with on fingerprints?
-temporarily turns latent fingerprints brown
-requires photograph - Answers iodine fuming
evaporated vapors react with sebum (oils/lipids) - Answers what do iodine fumes react with on
a fingerprint?
oils, moisture, sebum - Answers what do fingerprint powders stick to on a fingerprint?
-powder suspended in detergent
-colors allow max contrast - Answers sticky side/wet wop
frequently touched surfaces are textured for grip - Answers textured surfaces
-dust first
sweat and sebum are secreted by pores and spreads along skin ridges that are deposited upon
contact - Answers how are fingerprints made?
-on hands and soles of feet
-consistent throughout life - Answers friction ridges
-they don't change on their own
-damage must be done to the dermal layer of skin (burns, scars) - Answers can fingerprints
change over a lifetime?
-prints unable to be seen
-require enhancement (powders, chemicals, light) - Answers latent fingerprints
-prints able to be seen
-don't require enhancement
-created by sticky low-flow materials (blood, ink, grease) - Answers patent fingerprints
3D capture of a print in soft, fine-grained materials - Answers plastic impression
paper, cardboard - Answers porous substrates
metal, plastic, glass - Answers nonporous substrates
-targets nonporous substrates
-dust sticks to sebum on fingerprints - Answers fingerprint dusting
areas most likely to have been touched by the suspect
-door handles/frames
-windows
-furniture/appliances
-vehicles - Answers fingerprint target locations
1. photograph the dusted print
2. press fingerprint lifting tape across the print
3. gently smooth tape flat
, 4. lift off the print
5. press it over a lift card - Answers steps to lift a print
-smaller, high touch objects
-smooth, dry shapes
-all porous materials - Answers evidence collected at crime scenes
10 print card of rolled fingerprints from a known human - Answers fingerprint exemplar
chemical name for superglue - Answers cyanoacrylate
-enhancement and protection of latent fingerprints on nonporous substrates
-forms a plastic polymer built up from the print - Answers cyanoacrylate fuming
fumes bind to fats in the presence of water - Answers what do cyanoacrylate esters stick to on
a fingerprint?
-detection on porous substrates only
-forms "Ruhemann's purple" - Answers ninhydrin
reacts with amino acids in sweat - Answers what does ninhydrin react with on a fingerprint?
purple dye that works well to enhance fingerprints on clear tape - Answers gentian violet
works on formerly wet substrates - Answers small particle reagent (SPR)
molybdenum disulfide particles react with lipid components - Answers what does SPR react
with on fingerprints?
-temporarily turns latent fingerprints brown
-requires photograph - Answers iodine fuming
evaporated vapors react with sebum (oils/lipids) - Answers what do iodine fumes react with on
a fingerprint?
oils, moisture, sebum - Answers what do fingerprint powders stick to on a fingerprint?
-powder suspended in detergent
-colors allow max contrast - Answers sticky side/wet wop
frequently touched surfaces are textured for grip - Answers textured surfaces
-dust first
