Exam (elaborations)
midterm
- Course
- MANE2220
Exam of 19 pages for the course MANE2220 at UOIT (midterm)
[Show more]
Seller
Follow
Content preview
Fall 2024 Structure & Properties of Materials - MANE2220Midterm 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
[Type text] [Type text] Go to next page
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mastershifo13. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$18.56. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
56326 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now