Materials Engineering Test III questions and Answers
Which thermal treatment is intended for removing internal stress in glass?
A.) Annealing
B.) Quenching
C.) Temperint ** Answ** A (Annealing)
Which fabrication method is most suitable for brittle metals?
A.) Forming
B.) Casting
C.) Joining ** Answ** B (Casting)
Comparing (A) Thermoplastics and (B) Thermosets:
Which one is soluble in solvents? ** Answ** A (Thermoplastics)
Comparing (A) Thermoplastics and (B) Thermosets:
Which one has better thermo-mechanical properties? ** Answ** B (Thermosets)
Comparing (A) Thermoplastics and (B) Thermosets: Which one will decompose directly
without melting during heating? ** Answ** B (Thermosets)
Comparing (A) Thermoplastics and (B) Thermosets:
Which one can be melted? ** Answ** A (Thermoplastics)
Which is the maximum temperature for cold working of metals?
A.) Glass transition temperature
B.) Melting Temperature
C.) Recrystallization temperature ** Answ** C (Recrystallization temperature)
In order to enhance thermal decomposition of Fe3C, __________ cooling rate is
required.
A.) Fast
B.) Moderate
C.) Slow ** Answ** C (slow)
Which thermal treatment is able to create harder metallic structure?
A.) Spheroidizing
B.) Annealing
C.) Quenching ** Answ** C (quenching)
What is the chemical formula of the structural unit of silicate ceramics?
A.) SiO4^2-
B.) SiO4^4-
C.) Si2O5^4- ** Answ** B (SiO4^4-)
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, Which of the characteristics listed below distinguishes the stainless steels from other
steel types?
A.) They are more ductile
B.) They are stronger
C.) They are more wear resistant
D.) They are more corrosion resistant ** Answ** D (They are more corrosion
resistant)
Usually, ______ will lead to crystal structures with low strength and low modules
A.) Large super cooling
B.) Small super cooling ** Answ** B (small super cooling)
Which nucleation process requires high supercooling?
A.) Heterogenous nucleation
B.) Homogenous nucleation ** Answ** B (Homogenous nucleation)
Which of the following may NOT occur during an annealing heat treatment?
A.) Stresses may be relieved
B.) Ductility may increase
C.) Dimensions may change
D.) A specific microstructure may be produced ** Answ** C (Dimensions may
change)
To measure hardenability of metals, which process needs to be used?
A.) Annealing
B.) Quenching
C.) Tempering ** Answ** B (quenching)
Which medium will lead to the lowest hardenability of steels?
A.) Air
B.) Mineral Oil
C.) Water ** Answ** A (Air)
In particulate forming, ______ drying favors uniform shrinkage
A.) Slow
B.) Fast ** Answ** A (slow)
In Fe-C alloys, eutectoid transition occurs between austenite and ________?
A.) y ferrite + a ferrite
B.) y ferrite + cementite
C.) a ferrite + cementite ** Answ** C (a ferrite + cementite)
By tempering glass, which of the following goals can NOT be achieved?
A.) Compressive stresses on the surface
B.) Tensile stresses on the surface
C.) Improved surface crack resistance ** Answ** B (tensile stresses on the surface)
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Which thermal treatment is intended for removing internal stress in glass?
A.) Annealing
B.) Quenching
C.) Temperint ** Answ** A (Annealing)
Which fabrication method is most suitable for brittle metals?
A.) Forming
B.) Casting
C.) Joining ** Answ** B (Casting)
Comparing (A) Thermoplastics and (B) Thermosets:
Which one is soluble in solvents? ** Answ** A (Thermoplastics)
Comparing (A) Thermoplastics and (B) Thermosets:
Which one has better thermo-mechanical properties? ** Answ** B (Thermosets)
Comparing (A) Thermoplastics and (B) Thermosets: Which one will decompose directly
without melting during heating? ** Answ** B (Thermosets)
Comparing (A) Thermoplastics and (B) Thermosets:
Which one can be melted? ** Answ** A (Thermoplastics)
Which is the maximum temperature for cold working of metals?
A.) Glass transition temperature
B.) Melting Temperature
C.) Recrystallization temperature ** Answ** C (Recrystallization temperature)
In order to enhance thermal decomposition of Fe3C, __________ cooling rate is
required.
A.) Fast
B.) Moderate
C.) Slow ** Answ** C (slow)
Which thermal treatment is able to create harder metallic structure?
A.) Spheroidizing
B.) Annealing
C.) Quenching ** Answ** C (quenching)
What is the chemical formula of the structural unit of silicate ceramics?
A.) SiO4^2-
B.) SiO4^4-
C.) Si2O5^4- ** Answ** B (SiO4^4-)
For assistance with assignments contact
, Which of the characteristics listed below distinguishes the stainless steels from other
steel types?
A.) They are more ductile
B.) They are stronger
C.) They are more wear resistant
D.) They are more corrosion resistant ** Answ** D (They are more corrosion
resistant)
Usually, ______ will lead to crystal structures with low strength and low modules
A.) Large super cooling
B.) Small super cooling ** Answ** B (small super cooling)
Which nucleation process requires high supercooling?
A.) Heterogenous nucleation
B.) Homogenous nucleation ** Answ** B (Homogenous nucleation)
Which of the following may NOT occur during an annealing heat treatment?
A.) Stresses may be relieved
B.) Ductility may increase
C.) Dimensions may change
D.) A specific microstructure may be produced ** Answ** C (Dimensions may
change)
To measure hardenability of metals, which process needs to be used?
A.) Annealing
B.) Quenching
C.) Tempering ** Answ** B (quenching)
Which medium will lead to the lowest hardenability of steels?
A.) Air
B.) Mineral Oil
C.) Water ** Answ** A (Air)
In particulate forming, ______ drying favors uniform shrinkage
A.) Slow
B.) Fast ** Answ** A (slow)
In Fe-C alloys, eutectoid transition occurs between austenite and ________?
A.) y ferrite + a ferrite
B.) y ferrite + cementite
C.) a ferrite + cementite ** Answ** C (a ferrite + cementite)
By tempering glass, which of the following goals can NOT be achieved?
A.) Compressive stresses on the surface
B.) Tensile stresses on the surface
C.) Improved surface crack resistance ** Answ** B (tensile stresses on the surface)
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