Forensic Science
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| The fingerprint classification system used in most English speaking countries was devised by: | Henry
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| Under which circumstances have two people ben found to have identical fingerprints? | None to date
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| It is estimated that there are as many as_____ridge characteristics in an average complete fingerprint. | 150
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| The most commonly encountered ridge characteristics (used by AFIS) are the: | bifurcation and ridge ending
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| What is the minimum number of ridge characteristics necesary before two fingerprints can be identified as the same? | No minimum exists. Final determination must be made based on experience and knowledge of expert.
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| Fingerprints are formed: | During fetal development
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| The friction skin ridges | resist slippage and provide a firmer grip
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| Prints that are not readily visible are commonly referred to as | latent
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| The most common ridge pattern is the | Loop
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| To permanently alter the fingerprint and produce scars, one must damage the: | Dermal papillae
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| AFIS is a(n) | Computerized system for storing and retrieving fingerprint records
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| Prints impressed in a bar of soap are referred to as | plastic
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| Which is NOT considered a porous surface? | Tile
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| Ninhydrin is used on a latent print to detect | Protein Material
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| In which order should chemical treatments visualize latent prints be performed? 1)Ninhydrin 2) iodine fuming 3)Physical developer | 2,1,3
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| Superglue fuming is NOT suitible for us on | Cardboard
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| After successfully visualizing a latent print on an object an investigator should next: | take a 1:1 photograph of the print
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| The fingerprint pattern accounting for only 5 percent of all known patterns is the: | Arch
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| What statement is true of a parital fingerprint? | Any print can identify a criminal if it shows an adequate number of ridge characteristics
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| Chemical methods for developing latent fingerprints must be used in the following sequence: | Iodine, ninhydrin, physical developer
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| The three most common types of handguns are: | Single-Shot, revolvers, and semi automatics
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| The barrel of a shotgun: | is smooth without the grooves and lands found in rifles
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| The reason grooves are rifled into the bore of a gun is so that a: | bullet will be made to spin and hence have a true and accurate course on leaving the barrel
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| The comparison of two bullets is possible with the comparison microscope. Such a study is made difficult by the fact that: | A, B, and C (all of the above)
a: bullets distorted on impact
B:lands and grooves subject to wear and tear
C:grit and rust can alter markings on bullets fired through same barrel.
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| Generally, the gauage of a shotgun is_____ to the diameter of its barrel: | Directly related
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| Distinctive markings of shells and cartridges can be made by the: | extractor and ejector mechanism, magazine, firing pin, breech block-all of the above
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| IBIS is/are: | automated screening tools for firearm evidence
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| Generaly speaking, the amount of gun powder particles found around a bullet hole is ____ to the distance from which the weapon was fired: | directly related
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| Gun powder residue patterns can be detected by: | The Greiss test and IR photograph
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| The likelihood of detecting GSR on swabs taken from libing subjects more than six hours after a firing has occcurred is ___ the likelihood of detecting GSR within two hours of firing. | Less than
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| To prevent the disturbance of latent fingerprints on a firearm, the weapon should be lifted by | The edge of the trigger guard or by the checkered portion of the grip
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| Discharged evidence bullets must be carefully handled to avoid damage to the | striation markings
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| Tools and tool marks are often found at burglary scenes and can be useful evidence. Proper evidence collection by the field investigator would include | taking a photograph and cast of the marks, if necessary
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| Shoe and tire marks impressed into soft earth can be best preserved by | photographing and casting with dental stone
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| Which of the following is not expected to show any evidential arks or impressionns? | a shotgun pelet
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| Two elements detected on the hands of an individual who has recently fired a weapon are | barium and antimony
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| The presence of gunpowder residues on a garment whose color conceals the existence of the residues is best revealed by | infrared photography
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| The distribution of gunpowder particles and other discharge residues around a bullet hole permits | determination of the distance from which the gun was fired
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| An imprint may be lifted from a surface at a crime scene using | an electrostatic lifting device
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| A wear pattern, cut, gouge, or other damage pattern can impart_____ characteristics to a shoe: | individual
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BallisticsGal
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