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Forensic Science Chapter 8
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Questions in this quiz (36)
1The barrel of a shotgun:
- AIs indistinguishable from that of a rifle
- BIs smooth without the grooves and lands found in rifles
- CIs generally shorter than that of a rifle
- DIs wider at the end to concentrate shot
2The reason grooves are rifled into the bore of a gun is so that a:
- ABullet will be made to spin and have a true and accurate course on leaving the barrel
- BBullet moving though will have unique striations
- CManufacturer can put its unique mark on its product
- DBullet will be reduced in size before it exits the gun
3The comparison of two bullets is possible with the comparison microscope. Such a study is made difficult by the fact that:
- ALands and grooves are subject to wear and tear and hence striations markings are susceptible to continuing change.
- BOften evidence bullets are distorted on impact and only small areas are found with intact markings.
- CThe presence of grit and rust can to some degree alter the markings on bullets fired through the same barrel.
- DAll of the above
4Generally, the gauge of a shotgun is _______ to the diameter of its barrel
- ADirectly related
- BNot related
- CIndirectly related
- DNone of the above
5Distinctive markings of shells and cartridges can be made by the:
- AExtractor and ejector mechanism
- BFiring pin
- CBreech face mark
- DAll of the above
6NIBIN is/are:
- ATrade group of firearms manufacturers
- BSafety education courses for firearm use
- CA database for firearm evidence
- DLists of licenses gun dealers
7Generally speaking, the amount of gun powder particles found around a bullet hole is _____ to the distance from which the weapon was fired.
- AIndirectly related
- BNot related
- CDirectly related
- DNone of the above
8Gun powder residue patterns can be detected by:
- AThe Greiss Test
- BIR photograph
- CBoth a and b
- DNeither a nor b
9Chokes 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.
- AThe same as
- BGreater than
- CLess than
- DNone of the above
10The “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?
- ATobacco
- BChocolate
- CUrine
- DCosmetics
11The 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.
- AThe same as
- BLess than
- CGreater than
- DNone of the above
12Which technique of detecting GSR holds the most promise for the immediate future?
- AInfrared spectroscopy
- BSEM primer residue detection
- CNeutrn activation analysis
- DDermal nitrate test
13When 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.
- AA greater rate
- BThe same rate
- CA slower rate
- DNone
14To prevent the disturbance of latent fingerprints on a firearm, the weapon should be lifted by:
- AInserting a pencil into the barrel
- BUsing disposable forceps
- CThe outside of the barrel or the trigger
- DThe edge of the trigger guard or by the checkered portions of the grip
15When a gun is recovered from an underwater location, it should be:
- ATransported to the crime lab in a container with enough of the same water necessary to keep it submerged.
- BPlaced in an air-tight plastic bad
- CCleaned and dried
- DSubmitted to the crime lab in a paper bad
16Discharged evidence bullets must be carefully handled to avoid damage to the:
- AManufacturer's imprint
- BCaliber markings
- CStriation markings
- DEjection pattern
17Tools and tool marks are often found at burglary scenes and can be useful evidence. Proper evidence collection by the field investigator would include:
- AReporting whether a tool found at the crime scene fit into the tool marks
- BMaking test marks with the suspected tool onto a soft metal surface at the crime scene
- CTaking a photograph and cast of the marks if necessary
- DPacking of tool and tool mark evidence together so that the crime lab personnel know they are thought to be a matched set.
18Two-dimensional imprints found at a crime scene can be lifted using:
- APhotographic paper
- BA silicone casting medium
- CA scanning electron lifter
- DAn electrostatic lifting device
19Shoe and tire marks impressed into soft Earth can be best preserved by:
- APhotographing and casting with dental stone
- BPhotographing and then use of the electrostatic lifting technique.
- CCasting with dental stone and then attempting the electrostatic lift technique.
- DBoth a and b
20 Which is NOT a class characteristic of a suspect’s sneaker?
- AWear marks
- BBrand
- CColor
- DSize
21Which of the following is not expected to show any evidential marks or impressions?
- AA fired bullet
- BA cartridge casing fired from a handgun
- CA cartridge casting fired from a shotgun
- DA shotgun pellet
22Which of the following procedures is not to be followed in collecting and packaging firearms evidence at the crime scene?
- AMarking a fired bullet on its base for identification
- BAvoiding inserting a stick or pencil into the barrel of a weapon
- CMarking an empty cartridge case on its base for identification
- DUnloading a weapon before shipping it to the crime laboratory
23Two elements detected on the hands of an individual who has recently fired a weapon are:
- AZinc and copper
- BAntimony and barium
- CBarium and nitrates
- DAntimony and iron
24Which of the following factors is least likely to be considered by the examining tool mark technician?
- AThe direction of the tool movement as it passes over the surface
- BThe side or portion of the tool making the impression
- CThe brand name of the tool
- DThe angle at which the tool was held
25Which of the following results is not possible from a laboratory examination of firearm evidence?
- ADetermining that two or more cartridge cases were fired from the same weapon
- BDetermining how far from the victim the weapon was held
- CRestoring serial numbers ground off the gun
- DIdentifying a bullet as having been combined with a particular shell prior to being discharged
26Which of the following statements is true?
- AA bullet can be individualized to a weapon by the number and twist of its lands and grooves.
- BThe comparison microscope is an indispensable tool of the firearm examiner.
- CThe diameter of the bore of a rifled firearm is its gauge.
- DCarbonaceous smoke or soot deposited around a bullet hole is normally indicative of a discharge 12 to 18 feet or less from the target.
27The presence of gunpowder residues on a garment whose color conceals the existence of the residue is best revealed by:
- AInfrared photography
- BUltraviolet photography.
- CColor photography.
- DInfrared spectrophotometry.
28Which of the following rifling methods is no longer in use?
- AThe button method
- BThe hook cutter method
- CThe mandrel method
- DThe broach cutter method
29Which of the following makes the final determination about whether or not two bullets were fired by the same gun?
- AIBIS
- BA comparison microscope
- CNIBIN
- DA trained firearms examiner
30The automated shoe print identification system is known as:
- ASICAR
- BNIBIN
- CATF
- DIBIS
31Dust imprints found at a crime scene can be lifted using:
- APhotographic paper
- BA silicone casting medium
- CA scanning electron lifter
- DAn electrostatic lifting device
32. A technique applicable for determining whether or not an individual has ¬recently fired a weapon is:
- ANeutron activation analysis
- BAtomic absorption analysis
- CThe scanning electron microscope
- DAll of the above
33Objects bearing tool marks should either be submitted intact to the crime lab or a _____ should be taken of the tool mark.
- ADigital photograph
- BFilm photograph
- CBlack and white photograph
- DCast
34A wear pattern, cut, gouge, or other damage pattern can impart _____ characteristics to a shoe.
- AClass
- BWear
- CIndividual
- DGeneric
35An imprint may be lifted from a surface at a crime scene using:
- APlaster of paris
- BLuminol
- CImido black dye
- DAn electrostatic lifting device
36The distribution of gunpowder particles and other discharge residues around a bullet hole permits:
- ADetermination of the distance from which the gun was fired.
- BDetermination of the kind of firearm used.
- CEstimation of the angle of bullet impact.
- DEstimation of the height of the shooter.
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- Forensic Science Mid Term chapter 8
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- cheetahgoddess
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- English
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