METALLURGY FINAL EXAM 2024 WITH
100% CORRECT ANSWERS
When a design engineer defines requirements, these requirements are:
A. Mechanical properties
B. Manufacturing requirements
C. Geometric requirements
D. All of these are design requirements - correct answer✔✔ All of these are design requirements
Met 2110 focuses on which step in the manufacturing sequence?
A.Material Selection
B. Process selection
C. Manufacture or fabrication
D. Evaluation - correct answer✔✔ Material Selection
Materials in this family often exhibit good strength and good ductility. They are also good electrical and
thermal conductors.
A. Metals
B. Ceramics
C. Polymers - correct answer✔✔ Metals
Materials in this family are hard or strong, offer good electrical and thermal insulation, and can be
attractive for elevated temperature applications. Unfortunately, they are generally brittle.
A. Metals
B. Ceramics
C. Polymers - correct answer✔✔ Ceramics
,In this type of bonding, the bonds are "directional" (wanting a set and limited number of nearest
neighbors). The resulting materials have relatively low density.
A. Metallic
B. Ionic
C. Covalent
D. Vander Waals - correct answer✔✔ Covalent
Because the electrons in this type of bonding are not captive to either atoms or locations, but are free to
wander throughout the structure, electrical and thermal conductivities are good, and the materials are
often ductile.
A. Metallic
B. Ionic
C. Covalent
D. Vander Waals - correct answer✔✔ Metallic
All of the bonding electrons are tied up within molecules in this type of bonding. If the charge is not
distributed uniformly within the molecules, a weak electrostatic attraction can occur between the
polarized molecules. Its effects are often significant in polymeric materials.
A. Metallic
B. Ionic
C. Covalent
D. Vander Waals - correct answer✔✔ Vander Waals
In a crystalline lattice, the distance between adjacent lattice points (in a specified direction) is the:
A. Miller index
B. Lattice parameter
C. Packing factor
D. Coordination Number - correct answer✔✔ Lattice parameter
Metallic-bonded materials prefer crystal structures with dense packing and a large number of nearest
neighbors. The LEAST attractive structure is ___ since it has only ___ neighbors.
,A. SC -- 6
B. BCC -- 8
C. SC -- 8
D. BCC -- 6 - correct answer✔✔ SC -- 6
In the face-centered cubic (FCC) crystal structure, atoms touch along the:
A. Cube edges
B. Body diagonals
C. Face diagonals - correct answer✔✔ Face diagonals
The coordination number for a structure that contains close-packed planes is:
A. 6
B. 8
C. 12
D. 14 - correct answer✔✔ 12
The crystal structure that contains close-packed planes stacked in the ABABAB sequence is:
A. SC
B. BCC
C. FCC
D. HCP - correct answer✔✔ HCP
Compared to materials with other structures, materials with the BCC structure tend to:
A. Have greater strength
B. Have greater ductility
C. Be brittle - correct answer✔✔ Have greater strength
Upon cooling, iron changes from FCC to a BCC. Because of the relative packing factor efficiencies of
these structures, iron will __ when it transforms from FCC to BCC.
, A. Contract
B. Expand
C. Remain unchanged - correct answer✔✔ Expand
The close-packed directions in FCC crystals have the Miller Indices form of:
A. <100>
B. <110>
C. <111>
D. <000> - correct answer✔✔ <110>
*****16-19 are on paper***** - correct answer✔✔
A shorthand notation for all cube edges in cubic crystals would be:
A. <100>
B. <110>
C. <111>
D. <123> - correct answer✔✔ <100>
Adding imperfections to a commercial metal (one that already contains defects) will almost always __
the strength and __ the ductility.
A. Increase, increase
B. Increase, decrease
C. Decrease, increase
D. Decrease, decrease - correct answer✔✔ Increase, increase
A material with a ASTM grain size of 8 would have __ crystals compared to one of ASTM 4.
A. Smaller
B. The same size
C. Larger - correct answer✔✔ Smaller
100% CORRECT ANSWERS
When a design engineer defines requirements, these requirements are:
A. Mechanical properties
B. Manufacturing requirements
C. Geometric requirements
D. All of these are design requirements - correct answer✔✔ All of these are design requirements
Met 2110 focuses on which step in the manufacturing sequence?
A.Material Selection
B. Process selection
C. Manufacture or fabrication
D. Evaluation - correct answer✔✔ Material Selection
Materials in this family often exhibit good strength and good ductility. They are also good electrical and
thermal conductors.
A. Metals
B. Ceramics
C. Polymers - correct answer✔✔ Metals
Materials in this family are hard or strong, offer good electrical and thermal insulation, and can be
attractive for elevated temperature applications. Unfortunately, they are generally brittle.
A. Metals
B. Ceramics
C. Polymers - correct answer✔✔ Ceramics
,In this type of bonding, the bonds are "directional" (wanting a set and limited number of nearest
neighbors). The resulting materials have relatively low density.
A. Metallic
B. Ionic
C. Covalent
D. Vander Waals - correct answer✔✔ Covalent
Because the electrons in this type of bonding are not captive to either atoms or locations, but are free to
wander throughout the structure, electrical and thermal conductivities are good, and the materials are
often ductile.
A. Metallic
B. Ionic
C. Covalent
D. Vander Waals - correct answer✔✔ Metallic
All of the bonding electrons are tied up within molecules in this type of bonding. If the charge is not
distributed uniformly within the molecules, a weak electrostatic attraction can occur between the
polarized molecules. Its effects are often significant in polymeric materials.
A. Metallic
B. Ionic
C. Covalent
D. Vander Waals - correct answer✔✔ Vander Waals
In a crystalline lattice, the distance between adjacent lattice points (in a specified direction) is the:
A. Miller index
B. Lattice parameter
C. Packing factor
D. Coordination Number - correct answer✔✔ Lattice parameter
Metallic-bonded materials prefer crystal structures with dense packing and a large number of nearest
neighbors. The LEAST attractive structure is ___ since it has only ___ neighbors.
,A. SC -- 6
B. BCC -- 8
C. SC -- 8
D. BCC -- 6 - correct answer✔✔ SC -- 6
In the face-centered cubic (FCC) crystal structure, atoms touch along the:
A. Cube edges
B. Body diagonals
C. Face diagonals - correct answer✔✔ Face diagonals
The coordination number for a structure that contains close-packed planes is:
A. 6
B. 8
C. 12
D. 14 - correct answer✔✔ 12
The crystal structure that contains close-packed planes stacked in the ABABAB sequence is:
A. SC
B. BCC
C. FCC
D. HCP - correct answer✔✔ HCP
Compared to materials with other structures, materials with the BCC structure tend to:
A. Have greater strength
B. Have greater ductility
C. Be brittle - correct answer✔✔ Have greater strength
Upon cooling, iron changes from FCC to a BCC. Because of the relative packing factor efficiencies of
these structures, iron will __ when it transforms from FCC to BCC.
, A. Contract
B. Expand
C. Remain unchanged - correct answer✔✔ Expand
The close-packed directions in FCC crystals have the Miller Indices form of:
A. <100>
B. <110>
C. <111>
D. <000> - correct answer✔✔ <110>
*****16-19 are on paper***** - correct answer✔✔
A shorthand notation for all cube edges in cubic crystals would be:
A. <100>
B. <110>
C. <111>
D. <123> - correct answer✔✔ <100>
Adding imperfections to a commercial metal (one that already contains defects) will almost always __
the strength and __ the ductility.
A. Increase, increase
B. Increase, decrease
C. Decrease, increase
D. Decrease, decrease - correct answer✔✔ Increase, increase
A material with a ASTM grain size of 8 would have __ crystals compared to one of ASTM 4.
A. Smaller
B. The same size
C. Larger - correct answer✔✔ Smaller
