Exam (elaborations)
FTT-122 EXAM WITH QUESTIONS AND VERIFIED ANSWERS
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FTT-122 EXAM WITH QUESTIONS AND VERIFIED ANSWERS...
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FTT-122 EXAM WITH QUESTIONS ANDVERIFIED ANSWERS
What is the purpose of the rebated rim?
The rebated rim allows larger-bodied cartridges to be used in actions designed for
smaller-bodied cartridges.
Traditional cartridges meant for revolvers will headspace against the
_______________________ of the cartridge.
Rim
Steel cases often utilize _____________________ to protect them from rust and
corrosion.
Lacquer/Polymer
Select ALL purposes the rim of a cartridge can be used for.
Extraction, Headspace, and Firing
What is the most common case material?
Brass
What is the total case taper of a 7.62x39mm cartridge?
2.7 Degrees
Straight wall, rimless cases (e.g. pistol cases) will headspace against the
_________________________.
Mouth
List the features of the following cases:
1. Mouth 2. Extractor Groove 3. Shoulder
If the angle is sharp enough, bottleneck cases can headspace against the
,__________________.
Shoulder (Datum Point)
A ____________________ case uses multiple materials in its construction.
Hybrid
What are the FIVE Boxer primer sizes?
Large Pistol, Small Pistol/Rifle, Large Rifle, and .50 BMG
What is the cannelure on the projectile used for?
The cannelure prevents projectile setback.
What type of primer pocket utilizes TWO flash holes?
Berda
What purpose does the extractor groove serve?
The extractor groove provides clearance for the extractor claw.
Interpret the following headstamp markings:
Federal Cartridge (FC) .308 Winchester
What purpose does the "belt" on a belted cartridge serve?
The belt provides a point for headspace.
Identify the case type by its features:
Rimless, Bottleneck
Cases will typically undergo an/a _____________________ process between
"draws" when being formed.
Annealing
Explain why tapered cases present a unique challenge when magazine design is
concerned.
The case taper causes the stacked cases to form a curve. The magazine design must
, account for this curve, forcing the shape of the magazine to be curved.
If a firearm is chambered in .460 S&W Magnum, what other calibers can it safely
shoot?
.454 Casull, .45 Long Colt, .45 S&W
Stabilizers such as ______________________, __________________ and
_______________________are used to prevent deterioration of the propellant and
prevent it from becoming unstable.
Petroleum Jelly, Calcium Carbonate, and Magnesium Oxide
What is a single-base propellant?
A single-base propellant only utilizes one explosive in its formula.
Near the end of the 19th century, _____________________________ created the
first smokeless propellant, named ___________________________.
Paul Veillie, Poudre B
What does regressive burn rate mean?
As the granule burns, its surface area decreases.
What is a double-base propellant?
A double-base propellant utilizes two explosives in its formula.
What does a progressive burn rate mean?
As the granule burns, its surface area increases.
What does a neutral burn rate mean?
As the granule burns, its surface area will remain fairly consistent throughout the
reaction.
What is the average charge weight for .223 Remington with 55-grain projectile?
23.1 Grains
Cordite is a mixture of ________________, __________________________,
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