GIAC-FORENSICS EXAM QUESTIONS AND ANSWERS 2022/2023 WITH COMPLETE SOLUTION

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In general, the gauge of a shotgun is directly related to: -the diameter of the barrel -the type of metal the barrel contains -the length of the barrel -the lumen size - the diameter of the ba... rrel Match the term to its correct description. -Withdraws the cartridge from the firing chamber EXTRACTOR -metal block that prevents the bullet from backfiring from the weapon BREECHBLOCK -Diameter of a shotgun barrel GAUGE -Diameter of handgun CALIBER -Small dimple found on the primer of the gun FIRING PIC IMPRESSION -Marks on a bullet casing left by rifling of the bore of a barrel STRIATIONS - Striations, extractor, breechblock, gauge, caliber, firing pin impression Gun powder residue is MOST OFTEN found on what part of the hand of the person firing the weapon? -Index and middle finger -Thumb web and back of hand -Palm of the hand - Thumb web and back of hand Identify #5 - wad The reason grooves are rifled into the bore of a gun is so that ____________ -all of these are correct -a bullet moving through will have unique striations -the manufacturer can put its unique mark on the product -the bullet will made to spin and have a true and accurate course leaving the barrel - the bullet will made to spin and have a true and accurate course leaving the barrel How are ballistics specialist able to make a comparison among the minute details of two small bullets? - it is impossible to compare two bullets - using a hand lens - using a comparison microscope -by taking a photo and placing them along side each other on a monitor - - using a comparison microscope Distinctive markings on shells of ammunition can be made by _______________. -breechblock -all of these -extractor or ejector mechanism firing pin - all of these Identify #3 - primer The primer is identified by number __________. 3 5 4 1 - 5 When a handgun is retrieved from a body of water, how should it be transported? -submitted to a crime lab in a paper bag -transported in a container in water from where it was found -cleaned and dried -placed in an air-tight plastic bag - transported in a container in water from where it was found A shotgun shell can contain (choose all that apply): Flichettes (Darts) Plastic Pellets Steel Pellets Flash Bang Concussion Paint Pellets Lead Pellets - flichetts (darts), steel pellets, flash band concussion, lead pellets Match the bullet type to its description. -Round tip -Hollow tip -Wadcutter - -Round cutter: most commonly used, easy to manufacture, greatest velocity and maximum penetration -Hollow tip: Increase damage to tissues, mushrooms on impact -Wadcutter: generally used in exercises and practice; minimal penetration Gun powder residue patterns can be detected by: -Photography -Presumptive tests -the Greiss test - the Greiss test What is the purpose of a choke on shotgun barrels? -To decrease spin on the bullet -to constrict the end to increase speed and accuracy. -To increase spin on the bullet - to constrict the end to increase speed and accuracy. In some cases there are multiple wounds caused by a single bullet. These are identified as: -causative and effective -slip and seal -In and out -exit and entry - exit and entry A shotgun shell casing contains ignition powder and what projectiles are packed in the casing? -Copper pellets -BBs -airsoft pellets -Shot (lead pellets) - Shot (lead pellets) Generally speaking the amount of gun powder particles found around a bullet hole is _____________ to the distance from which the weapon was fired. -not related -indirectly related -directly related - directly related How do investigators use clues in crimes involving weapons to solve a case? -By collecting blood samples -By questioning suspects -By working backwards -By photographing the scene - By working backwards The dermal nitrate test was once used as a method for discovering gun powder residue on a suspect but it is no longer used because of the increasing number of false positives. Which of the following substances did NOT produce a false positive? -cosmetics -urine -chocolate -tobacco - chocolate Which number is pointing to the bullet/projectile? 1 4 5 2 - 1 The study of bullets and their spent cartridge casings for markings left on them by the firearm that shot them is known as ______________. Explosives Ballistics Rifling Arson - ballistics When collecting a gun as evidence at a crime scene a tag must be applied to the weapon for identification, connection to a case, and chain of custody. Where is the tag attached on the gun? -to the trigger guard -To the barrel -To the firing pin -to the handle - to the trigger guard What location is the site of the ATF- the authority on firearms? -Washington, DC -Dallas, TX -Chicago, IL -San Francisco, CA - Washington, DC How are guns test fired in a lab? -In a water filled bullet recovery tank -By shooting into a pool -By shooting at a silicon manekin - In a water filled bullet recovery tank Because of the low amount of technology needed to create them, as well as the commonality of the items used, 80% of evidence that arrives at ATF labs are..... -shell bombs -grenades -pipe bombs -case bombs - pipe bombs In the US, the rarest blood type is ___________. -A -B -O -AB - AB In what direction was the blood travelling when it hit the surface in the picture above? -East (to the right) -It is impossible to determine -West (to the left) - East (to the right) The study of blood and body fluids is known as: -criminology -pathology -histology -serology - serology A person with blood type A+ needs a blood transfusion. Which of the following blood types could donate blood for this person? Select all that apply. - O- - A- - O+ - B- - A+ - AB+ - AB- - B+ - O-, A-, O+, A+ [Show More]

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