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IMSE 250 - Fall 2022 Final Study guide (1)
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IMSE 250 - Fall 2022 Final Study guide(33) Inspections can be done in two ways: by attributes or by variables. An inspection by using a
go/no-go gauge is done by ________________.
(A) attributes
(B) variables - ANS-attributes
Cr, W, and V are commonly used metal elements added to steels to produce cutting tools. They
all have a _________ crystalline structure. - ANS-Body-centered Cubic
Please judge the following statement: units that we usually use to define strain are mm and
inch. T/F - ANS-False
What is the name of the copper-zinc alloy? - ANS-brass
Which one of the following materials has the lowest carbon content? - ANS-Cold finish ASTM
1040 carbon steel
Please judge the following statement: units that we usually use to define stress are N and kN
(newtons). T/F - ANS-False
Stainless steel's resistance to corrosion and staining and low maintenance make it an ideal
material for many applications. Besides carbon and iron, stainless steel must also have
__________ (element). - ANS-Chromium
Among the following five groups of manufacturing processes, which one exploits the ductility of
certain metallic materials to produce parts?
(A) Casting.
(B) Material removal.
(C) Deformation.
(D) Consolidation.
(E) Additive manufacturing. - ANS-Deformation
The ductility of a steel test specimen can be found out by studying ___________________. -
ANS-the ability of the specimen to stretch before it fractures
We feel that it is harder to bend the copper tube back to the original straight-line shape than to
bend it over initially because of the strain hardening effect. During this process, some material
properties at the bent location are changed.
The tensile strength of the copper tube at the bent location will be __________.
Increased
Decreased - ANS-increased, strain hardening
,Continue with the "copper tube bending" question described in Questions 9. The Young's
modulus of the copper tube at the bent location will be ___________.
increased, decreased, the same - ANS-The Same.
The Young's modulus (E) is a property of the material that tells us how easily it can stretch and
deform and is defined as the ratio of tensile stress (σ) to tensile strain (ε).
Continue with the "copper tube bending" question described in Questions 9. The ductility of the
copper tube at the bent location will be __________.
Increased, decreased, the same - ANS-decrease, ductility is how easy something is
bent/deformed
Please identify what type(s) of deformation happened during this "copper tube bending" process
described in Questions 9.
Plastic deformation
elastic deformation
both - ANS-both
The copper tube/tubing as shown in Question 9 is used for air conditioning and refrigeration and
manufactured by (wire) drawing, which belongs to ______ material processing. -
ANS-Deformation
Which material is most likely to be an engineering ceramic material such as silicon nitride,
silicon carbide, and a large number of oxides (instead of other types of engineering materials)? -
ANS-Material A
Which material is the most ductile (see diagram in Question 14)? - ANS-Material C
Which material is the stiffest (see diagram in Question 14)? - ANS-Material B
Generally speaking, for a steel, as its tensile strength decreases, its hardness __________. -
ANS-decreases
Young's modulus is one of the ___________ of an engineering material.
physical or material properties - ANS-Material
__________ do not exhibit a yield point (the plateau yielding phenomenon on the stress strain
curve), so an offset yield point (commonly set at 0.2% strain) is used on these materials.
Low Carbon steel
Aluminium Alloys - ANS-Aluminium Alloys
lease examine the two steel grain microstructures after rolling processes (the lines in these
microscopic images are grain boundaries). __________ shows a hot-rolled steel grain
microstructure; whereas, __________ shows a cold-rolled steel grain microstructure.
, A shows large sections of material and Material B shows smaller, and more stratified material -
ANS-(A) A is hot-rolled steel and B is cold-rolled steel
The gateway arch at St. Louis is made from stainless steel (the cross-section has a triangular
shape). Imagining several ideas are proposed to make the structure less stiff if another arch
were to be built so visitors could feel more "swing" at the observation area at the top. You are to
judge (using the knowledge you have learned from IMSE 250) if each idea would help to
increase the "swing".
(22) Heat treatment of the stainless steel. - ANS-Would NOT help
Continue with "Gateway Arch" in Question 22. Use aluminum alloy instead of stainless steel. -
ANS-WOULD help
Which one of the following Fe-C phases does NOT have a body-centered cubic crystal
structure?
(A) Ferrite
(B) Austenite
(C) Cementite
(D) Martensite - ANS-Austenite
A six sigma process is one in which 99.99966% of all opportunities to produce some features of
a part are statistically expected to be free of defects (3.4 defective features per million
opportunities). Sigma (σ) refers to the statistical concept of __________.
(A) variance
(B) standard deviation
(C) mean
(D) confidence interval - ANS-Standard Deviation
Annealing in a furnace gives ___________________ steel than normalizing in still air.
(A) weaker and more brittle
B) weaker and more ductile
(C) stronger and more ductile
(D) stronger and more brittle - ANS-Weaker and More Ductile
A steel bar (carbon content is known) is heated above the Austenite temperature and kept at
that temperature for a long time (fully Austenitized). It then is cooled down to the ambient
temperature at a constant given cooling rate (temperature decreases over time throughout the
cooling curve). Which diagram would you use to find out the crystallization structure of this steel
at ambient temperature?
(A) Iron-Carbon Equilibrium diagram
(B) Continuous-Cooling-Transformation (CCT) diagram - ANS-Continuous
-cooling-Transformation (CCT) diagram
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