1385805
Descripción
Test por cheetahgoddess, actualizado hace más de 1 año
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Creado por cheetahgoddess
hace alrededor de 10 años
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Pregunta 1
Pregunta
The barrel of a shotgun:
Respuesta
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Is indistinguishable from that of a rifle
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Is smooth without the grooves and lands found in rifles
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Is generally shorter than that of a rifle
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Is wider at the end to concentrate shot
Pregunta 2
Pregunta
The reason grooves are rifled into the bore of a gun is so that a:
Respuesta
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Bullet will be made to spin and have a true and accurate course on leaving the barrel
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Bullet moving though will have unique striations
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Manufacturer can put its unique mark on its product
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Bullet will be reduced in size before it exits the gun
Pregunta 3
Pregunta
The comparison of two bullets is possible with the comparison microscope. Such a study is made difficult by the fact that:
Respuesta
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Lands and grooves are subject to wear and tear and hence striations markings are susceptible to continuing change.
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Often evidence bullets are distorted on impact and only small areas are found with intact markings.
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The presence of grit and rust can to some degree alter the markings on bullets fired through the same barrel.
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All of the above
Pregunta 4
Pregunta
Generally, the gauge of a shotgun is _______ to the diameter of its barrel
Respuesta
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Directly related
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Not related
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Indirectly related
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None of the above
Pregunta 5
Pregunta
Distinctive markings of shells and cartridges can be made by the:
Respuesta
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Extractor and ejector mechanism
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Firing pin
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Breech face mark
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All of the above
Pregunta 6
Pregunta
NIBIN is/are:
Respuesta
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Trade group of firearms manufacturers
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Safety education courses for firearm use
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A database for firearm evidence
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Lists of licenses gun dealers
Pregunta 7
Pregunta
Generally speaking, the amount of gun powder particles found around a bullet hole is _____ to the distance from which the weapon was fired.
Respuesta
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Indirectly related
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Not related
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Directly related
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None of the above
Pregunta 8
Pregunta
Gun powder residue patterns can be detected by:
Respuesta
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The Greiss Test
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IR photograph
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Both a and b
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Neither a nor b
Pregunta 9
Pregunta
Chokes are sometimes found on shotguns where they function to constrict the end of the barrel. The speed and distance traveled by pellets fired from a narrow choke is _____ the speed and distance traveled by pellets fired from a shotgun with a wide choke.
Respuesta
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The same as
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Greater than
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Less than
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None of the above
Pregunta 10
Pregunta
The “dermal nitrate test” has fallen into disfavor because of its lack of specificity. Which of the following common materials does NOT give a misleading positive reaction to this test?
Respuesta
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Tobacco
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Chocolate
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Urine
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Cosmetics
Pregunta 11
Pregunta
The likelihood of detecting GSR on swabs taken from living subjects more than six hours after a firing has occurred is _____ the likelihood of detecting GSR within two hours of a firing.
Respuesta
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The same as
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Less than
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Greater than
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None of the above
Pregunta 12
Pregunta
Which technique of detecting GSR holds the most promise for the immediate future?
Respuesta
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Infrared spectroscopy
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SEM primer residue detection
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Neutrn activation analysis
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Dermal nitrate test
Pregunta 13
Pregunta
When an etching agent is applied to a metal surface in order to restore a removed serial number the stamped area will dissolve at _____ as the unstamped area.
Respuesta
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A greater rate
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The same rate
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A slower rate
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None
Pregunta 14
Pregunta
To prevent the disturbance of latent fingerprints on a firearm, the weapon should be lifted by:
Respuesta
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Inserting a pencil into the barrel
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Using disposable forceps
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The outside of the barrel or the trigger
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The edge of the trigger guard or by the checkered portions of the grip
Pregunta 15
Pregunta
When a gun is recovered from an underwater location, it should be:
Respuesta
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Transported to the crime lab in a container with enough of the same water necessary to keep it submerged.
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Placed in an air-tight plastic bad
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Cleaned and dried
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Submitted to the crime lab in a paper bad
Pregunta 16
Pregunta
Discharged evidence bullets must be carefully handled to avoid damage to the:
Respuesta
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Manufacturer's imprint
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Caliber markings
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Striation markings
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Ejection pattern
Pregunta 17
Pregunta
Tools and tool marks are often found at burglary scenes and can be useful evidence. Proper evidence collection by the field investigator would include:
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Reporting whether a tool found at the crime scene fit into the tool marks
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Making test marks with the suspected tool onto a soft metal surface at the crime scene
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Taking a photograph and cast of the marks if necessary
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Packing of tool and tool mark evidence together so that the crime lab personnel know they are thought to be a matched set.
Pregunta 18
Pregunta
Two-dimensional imprints found at a crime scene can be lifted using:
Respuesta
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Photographic paper
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A silicone casting medium
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A scanning electron lifter
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An electrostatic lifting device
Pregunta 19
Pregunta
Shoe and tire marks impressed into soft Earth can be best preserved by:
Respuesta
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Photographing and casting with dental stone
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Photographing and then use of the electrostatic lifting technique.
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Casting with dental stone and then attempting the electrostatic lift technique.
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Both a and b
Pregunta 20
Pregunta
Which is NOT a class characteristic of a suspect’s sneaker?
Respuesta
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Wear marks
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Brand
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Color
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Size
Pregunta 21
Pregunta
Which of the following is not expected to show any evidential marks or impressions?
Respuesta
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A fired bullet
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A cartridge casing fired from a handgun
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A cartridge casting fired from a shotgun
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A shotgun pellet
Pregunta 22
Pregunta
Which of the following procedures is not to be followed in collecting and packaging firearms evidence at the crime scene?
Respuesta
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Marking a fired bullet on its base for identification
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Avoiding inserting a stick or pencil into the barrel of a weapon
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Marking an empty cartridge case on its base for identification
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Unloading a weapon before shipping it to the crime laboratory
Pregunta 23
Pregunta
Two elements detected on the hands of an individual who has recently fired a weapon are:
Respuesta
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Zinc and copper
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Antimony and barium
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Barium and nitrates
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Antimony and iron
Pregunta 24
Pregunta
Which of the following factors is least likely to be considered by the examining tool mark technician?
Respuesta
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The direction of the tool movement as it passes over the surface
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The side or portion of the tool making the impression
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The brand name of the tool
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The angle at which the tool was held
Pregunta 25
Pregunta
Which of the following results is not possible from a laboratory examination of firearm evidence?
Respuesta
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Determining that two or more cartridge cases were fired from the same weapon
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Determining how far from the victim the weapon was held
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Restoring serial numbers ground off the gun
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Identifying a bullet as having been combined with a particular shell prior to being discharged
Pregunta 26
Pregunta
Which of the following statements is true?
Respuesta
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A bullet can be individualized to a weapon by the number and twist of its lands and grooves.
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The comparison microscope is an indispensable tool of the firearm examiner.
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The diameter of the bore of a rifled firearm is its gauge.
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Carbonaceous smoke or soot deposited around a bullet hole is normally indicative of a discharge 12 to 18 feet or less from the target.
Pregunta 27
Pregunta
The presence of gunpowder residues on a garment whose color conceals the existence of the residue is best revealed by:
Respuesta
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Infrared photography
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Ultraviolet photography.
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Color photography.
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Infrared spectrophotometry.
Pregunta 28
Pregunta
Which of the following rifling methods is no longer in use?
Respuesta
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The button method
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The hook cutter method
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The mandrel method
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The broach cutter method
Pregunta 29
Pregunta
Which of the following makes the final determination about whether or not two bullets were fired by the same gun?
Respuesta
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IBIS
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A comparison microscope
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NIBIN
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A trained firearms examiner
Pregunta 30
Pregunta
The automated shoe print identification system is known as:
Respuesta
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SICAR
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NIBIN
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ATF
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IBIS
Pregunta 31
Pregunta
Dust imprints found at a crime scene can be lifted using:
Respuesta
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Photographic paper
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A silicone casting medium
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A scanning electron lifter
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An electrostatic lifting device
Pregunta 32
Pregunta
. A technique applicable for determining whether or not an individual has ¬recently fired a weapon is:
Respuesta
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Neutron activation analysis
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Atomic absorption analysis
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The scanning electron microscope
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All of the above
Pregunta 33
Pregunta
Objects bearing tool marks should either be submitted intact to the crime lab or a _____ should be taken of the tool mark.
Respuesta
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Digital photograph
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Film photograph
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Black and white photograph
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Cast
Pregunta 34
Pregunta
A wear pattern, cut, gouge, or other damage pattern can impart _____ characteristics to a shoe.
Respuesta
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Class
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Wear
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Individual
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Generic
Pregunta 35
Pregunta
An imprint may be lifted from a surface at a crime scene using:
Respuesta
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Plaster of paris
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Luminol
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Imido black dye
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An electrostatic lifting device
Pregunta 36
Pregunta
The distribution of gunpowder particles and other discharge residues around a bullet hole permits:
Respuesta
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Determination of the distance from which the gun was fired.
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Determination of the kind of firearm used.
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Estimation of the angle of bullet impact.
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Estimation of the height of the shooter.
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