FRSC 500 Final questions & answers
already passed
What two categories are firearms generally divided into
Handguns and long guns
Know the most common types of handguns
single-shot handguns, revolver, and semiautomatics
Know the two types of long guns
rifles and shotguns
Grooves
the cut or low-lying portions between the lands in a rifled bore
Rifling
the spiral grooves formed in the bore of a firearm barrel that impart spin to the projectile when
it is fired
,Bore
The interior of a firearm barrel
Lands
The raised portion between the grooves in a rifled bore
Caliber
The diameter of the bore of a rifled firearm, usually expressed in hundredths of an inch or
millimeters (ex: .22 caliber and 9 millimeter)
What is the difference between caliber and gauge
Gauge: the size destination of a shotgun; originally the number of lead balls with the same
diameter as the barrel that would make a pound. The only exception is the .410 shotgun, in
which bore size is 0.41 inch. Diameter of the shotgun barrel. The higher the number, the smaller
the diameter.
Caliber: The diameter of the bore of a rifled firearm, usually expressed in hundredths of an inch
or millimeters
How are bullet markings compared
There is no practical way to directly compare the markings on the fired bullet and those within a
barrel, the examiner must obtain test bullets fired through the suspect's barrel for comparison.
, The number of lands and grooves and their direction of twist are obvious points of comparison
during the initial stages of the examination.
If both bullets carry the same class characteristics, then the analyst must then begin to match
the striated markings on both bullets.
Two bullets are simultaneously rotated to obtain additional matching areas around the
periphery of the bullets. The final opinion must be based on the judgement, experience, and
knowledge of the expert
Know what NIBIN is
National Integrated Ballistics Information Network.
Produces database files from bullets and cartridge casings retrieved from crime scenes or test
fires from retrieved firearms.
Unified firearms search system that incorporates both DRUGFIRE and IBIS technologies
What is distance determination
The process of determining the distance between the firearm and a target
How is it distance determination determined
Based on the distribution of powder patterns or the spread of a shot pattern.
already passed
What two categories are firearms generally divided into
Handguns and long guns
Know the most common types of handguns
single-shot handguns, revolver, and semiautomatics
Know the two types of long guns
rifles and shotguns
Grooves
the cut or low-lying portions between the lands in a rifled bore
Rifling
the spiral grooves formed in the bore of a firearm barrel that impart spin to the projectile when
it is fired
,Bore
The interior of a firearm barrel
Lands
The raised portion between the grooves in a rifled bore
Caliber
The diameter of the bore of a rifled firearm, usually expressed in hundredths of an inch or
millimeters (ex: .22 caliber and 9 millimeter)
What is the difference between caliber and gauge
Gauge: the size destination of a shotgun; originally the number of lead balls with the same
diameter as the barrel that would make a pound. The only exception is the .410 shotgun, in
which bore size is 0.41 inch. Diameter of the shotgun barrel. The higher the number, the smaller
the diameter.
Caliber: The diameter of the bore of a rifled firearm, usually expressed in hundredths of an inch
or millimeters
How are bullet markings compared
There is no practical way to directly compare the markings on the fired bullet and those within a
barrel, the examiner must obtain test bullets fired through the suspect's barrel for comparison.
, The number of lands and grooves and their direction of twist are obvious points of comparison
during the initial stages of the examination.
If both bullets carry the same class characteristics, then the analyst must then begin to match
the striated markings on both bullets.
Two bullets are simultaneously rotated to obtain additional matching areas around the
periphery of the bullets. The final opinion must be based on the judgement, experience, and
knowledge of the expert
Know what NIBIN is
National Integrated Ballistics Information Network.
Produces database files from bullets and cartridge casings retrieved from crime scenes or test
fires from retrieved firearms.
Unified firearms search system that incorporates both DRUGFIRE and IBIS technologies
What is distance determination
The process of determining the distance between the firearm and a target
How is it distance determination determined
Based on the distribution of powder patterns or the spread of a shot pattern.
