Question Paper: Material Science Question Paper - Jun 17 - Mechanical Engineering (Semester 3) - Pune University (PU)
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Material Science - Jun 17

Mechanical Engineering (Semester 3)

Total marks: 50
Total time: 2 Hours
INSTRUCTIONS
(1) Figures to the right indicate full masrks.
(2) Answer Q.no 1 or Q.no2, Q.no 3 or Q.no4, Q.no 5 or Q.no6, Q.no7 or Q.no 8
(3) Draw neat diagrams wherever necessary.

1.a. Calculate atomic packing factor for BCC and FCC crystal structure.
(6 marks) 00

1.b. What is strain hardening and how does it affixer plastic deformation? Explain theory of dislocation on the basis of rotation of slip planes during plastic deformation.
(6 marks) 00

OR

2.a. What do you mean by the term "miller Indices"? Explain the procedure and determine the Miller for plane.(111)
(4 marks) 00

2.b. What makes ceramics different than polymers with respect to properties?
(2 marks) 00

2.c. What are different classifications of imperfections in crystal structure? Explain the point imperfection in detail.
(6 marks) 00

3.a. What is the basic difference between destructive and non-destructive testing? Explain the purpose of the following testing method:

i) Tensile test

ii)Ultrasonic

iii) Creep test.

(7 marks) 00

3.b. What do you mean by the term corrosion? What are the different ways to delay the destructive of metal under corrosion?
(6 marks) 00

OR

4.a. Identity the type of corrosion for the following cases:

i)Formation of cavities of small anodic area around which metal is relatively unattached as compared large cathodic area.

ii) Simultaneous effect of environment and cyclic fluctuation of stress.

iii)The grain boundary phase or a region adjacent to the grain boundary becomes anodic and get preferably corroded due to precipitation off some phase.

iv) An accelerated attack at the junction of two metals exposed to a corrosive environment.

(4 marks) 00

4.b. What is sacrificial anode?
(3 marks) 00

4.c. What is the basic difference between hardness and toughness of the material? Explain the method to determine the toughness.
(6 marks) 00

5.a. What are the properties of coating materials? Which are affects surface quality? Explain any three cleaning methods.
(6 marks) 00

5.b. What is shot blasting?
(3 marks) 00

5.c. List out the factors affecting electro-deposition.
(3 marks) 00

OR

6.a. Compare PVD and GVD coating.
(4 marks) 00

6.b. Explain the process of Ion vapour deposition (IVD) with principle of working , advantages and disadvantages and applications.
(6 marks) 00

6.c. What is powder coating?
(2 marks) 00

7.a. Explain the basic steps of powder metallurgy process.
(4 marks) 00

7.b, Explain the role and function of lubricants and binders in powder Metallurgy.
(6 marks) 00

7.c. Why is sintering important step in Powder Metallurgy?
(3 marks) 00

OR

8.a. Sieve analysis method is used in determination which property of powder metallurgy ? Explain it with neat diagram.
(5 marks) 00

8.b. Write flow chart of production of friction material.
(4 marks) 00

8.c. Explain carbonic process for powder manufacturing.
(4 marks) 00

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written 3 months ago by gravatar for bharathchippa49 bharathchippa490
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