Fall 2024 Structure & Properties of Materials - MANE2220
Midterm Exam
Instructor: Professor Ghaus Rizvi & Professor Ramona Fayazfar
Date: Saturday, October 12th, 2024
Question MCQ SA 1 2 3 4 5 6 Total
Mark
NAME:______________________________ID:______________________
Please show all your work to get marks for each part of the questions.
Important instructions (you will lose marks if these are not followed):
1. Hand write clearly
2. Answer questions in proper sequence
3. Closed book & closed laptop, only a calculator is allowed.
4. The questions do not carry equal marks. Spend your time accordingly.
,MANE 2220U Midterm Exam – Fall 2024 Suggested Duration: 20 Minutes
Mark the correct answer on the scan able sheet provided (Part A1 15 marks 20 minutes)
1) During elastic deformation, a metal 6) True stress on a body deformed by the
experiences: application of a force is defined as:
a. necking a. Force divided by the actual cross sectional
b. bond breaking area
c. bond stretching b. Force multiplied by the actual cross
sectional area
c. Force multiplied by the original cross
2) Most imperfections in solid crystal
sectional area
structure of metals originate:
d. Force divided by the original cross-
a. When it is subjected to stress and strain sectional area
b. During the machining process
c. When the material is heated 7) If a material is subjected to torsion;
d. When the molten metals solidify
a. it experiences sheer stresses
b. it experiences tensile stresses
3) Polymorphism is defined as
c. it experiences compressive stresses
a. the property of a material which enables it
to form different crystal structures under
different conditions 8) A dislocation in Crystal is:
b. the property of a material which enables it
a. a zero-dimensional defect
to form different crystal sizes under different
b. a one-dimensional defect
conditions
c. a two-dimensional defect
c. the property of a material which enables it
d. a three-dimensional defect
to form different compositions under
different conditions
9) The solubility of a solute in general
4) The number of vacancies in a material a. decreases with increasing pressure
b. decreases with increasing temperature
a. Increase in inverse proportion to the
c. is higher when crystal structures of
temperature.
constituents are similar
b. Decrease in direct proportion to the
d. is lower when the atom sizes are similar
temperature.
c. Increase in direct proportion to the
10) Case hardening is an example of
temperature.
d. Increase exponentially with increasing a. Brownian diffusion
temperature. b. Interstitial diffusion
c. Substitutional diffusion
5) Young's modulus is d. Inter-molecular diffusion
a. The slope of the stress-torsion curve
11) The diffusion coefficient is;
b. Constant of proportionality between shear
force and sheer stresses a. inversely proportional to the absolute
c. The slope of the stress strain curve temperature of the material
d. Constant of proportionality between stress b. exponentially proportional to the absolute
and change in volume temperature of the material
c. directly proportional to the absolute
temperature of the material
, 12) Which of the following statements is 17) Which crystalline structure does this
NOT correct in general? picture represent?
a. increasing hardness reduces toughness
b. brittle materials cannot withstand impacts
c. higher ductility improves toughness a. SC
d. increasing hardness increases toughness b. HCP
c. BCC
d. FCC
13) A plane passing through a unit cell
has the following axial intercepts: a=1/2,
18) Metallic bonds are formed by:
b= 1/3, c= 1. The miller index of this
plane is:
a. transferring of electrons from one
atom to another
a. (231)
b. sharing of electrons between two
b. (326)
atoms
c. (136)
c. sharing electrons among all atoms
5. (132)
19) The dark lines in the figure represent
14) Elastic deformation
a. Can be reversed by applying
additional force
b. Can be reversed by removing the
applied force
c. Cannot be reversed
d. Can be enhanced by reducing the
applied force
a. Grain Boundaries
15) A point in a crystal unit cell is: b. Angle of Misalignment
c. Small Angle Grains
a. (1,1,1)
b. (1 1 1) d. Line of Atoms
c. 111
d. [1 1 1] 20) What stacking sequence does this
picture represents?
16 The two mechanisms of diffusion are...
a. ABAB
a. Vacancy diffusion and substitutional
b. ABC
diffusion c. ABCD
b. Vacancy diffusion and interstitial d. None of the above
diffusion
c. Brownian motion and substitutional
diffusion
d. convective diffusion and conducting
diffusion
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Midterm Exam
Instructor: Professor Ghaus Rizvi & Professor Ramona Fayazfar
Date: Saturday, October 12th, 2024
Question MCQ SA 1 2 3 4 5 6 Total
Mark
NAME:______________________________ID:______________________
Please show all your work to get marks for each part of the questions.
Important instructions (you will lose marks if these are not followed):
1. Hand write clearly
2. Answer questions in proper sequence
3. Closed book & closed laptop, only a calculator is allowed.
4. The questions do not carry equal marks. Spend your time accordingly.
,MANE 2220U Midterm Exam – Fall 2024 Suggested Duration: 20 Minutes
Mark the correct answer on the scan able sheet provided (Part A1 15 marks 20 minutes)
1) During elastic deformation, a metal 6) True stress on a body deformed by the
experiences: application of a force is defined as:
a. necking a. Force divided by the actual cross sectional
b. bond breaking area
c. bond stretching b. Force multiplied by the actual cross
sectional area
c. Force multiplied by the original cross
2) Most imperfections in solid crystal
sectional area
structure of metals originate:
d. Force divided by the original cross-
a. When it is subjected to stress and strain sectional area
b. During the machining process
c. When the material is heated 7) If a material is subjected to torsion;
d. When the molten metals solidify
a. it experiences sheer stresses
b. it experiences tensile stresses
3) Polymorphism is defined as
c. it experiences compressive stresses
a. the property of a material which enables it
to form different crystal structures under
different conditions 8) A dislocation in Crystal is:
b. the property of a material which enables it
a. a zero-dimensional defect
to form different crystal sizes under different
b. a one-dimensional defect
conditions
c. a two-dimensional defect
c. the property of a material which enables it
d. a three-dimensional defect
to form different compositions under
different conditions
9) The solubility of a solute in general
4) The number of vacancies in a material a. decreases with increasing pressure
b. decreases with increasing temperature
a. Increase in inverse proportion to the
c. is higher when crystal structures of
temperature.
constituents are similar
b. Decrease in direct proportion to the
d. is lower when the atom sizes are similar
temperature.
c. Increase in direct proportion to the
10) Case hardening is an example of
temperature.
d. Increase exponentially with increasing a. Brownian diffusion
temperature. b. Interstitial diffusion
c. Substitutional diffusion
5) Young's modulus is d. Inter-molecular diffusion
a. The slope of the stress-torsion curve
11) The diffusion coefficient is;
b. Constant of proportionality between shear
force and sheer stresses a. inversely proportional to the absolute
c. The slope of the stress strain curve temperature of the material
d. Constant of proportionality between stress b. exponentially proportional to the absolute
and change in volume temperature of the material
c. directly proportional to the absolute
temperature of the material
, 12) Which of the following statements is 17) Which crystalline structure does this
NOT correct in general? picture represent?
a. increasing hardness reduces toughness
b. brittle materials cannot withstand impacts
c. higher ductility improves toughness a. SC
d. increasing hardness increases toughness b. HCP
c. BCC
d. FCC
13) A plane passing through a unit cell
has the following axial intercepts: a=1/2,
18) Metallic bonds are formed by:
b= 1/3, c= 1. The miller index of this
plane is:
a. transferring of electrons from one
atom to another
a. (231)
b. sharing of electrons between two
b. (326)
atoms
c. (136)
c. sharing electrons among all atoms
5. (132)
19) The dark lines in the figure represent
14) Elastic deformation
a. Can be reversed by applying
additional force
b. Can be reversed by removing the
applied force
c. Cannot be reversed
d. Can be enhanced by reducing the
applied force
a. Grain Boundaries
15) A point in a crystal unit cell is: b. Angle of Misalignment
c. Small Angle Grains
a. (1,1,1)
b. (1 1 1) d. Line of Atoms
c. 111
d. [1 1 1] 20) What stacking sequence does this
picture represents?
16 The two mechanisms of diffusion are...
a. ABAB
a. Vacancy diffusion and substitutional
b. ABC
diffusion c. ABCD
b. Vacancy diffusion and interstitial d. None of the above
diffusion
c. Brownian motion and substitutional
diffusion
d. convective diffusion and conducting
diffusion
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