SPPU Material Science - May 2014 Exam Question Paper

SPPU Mechanical Engineering (Semester 3)
Material Science
May 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any three:

1 (a) Differentiate between cold working and hot working.

4 M

Answer any one question from Q1 and Q2

1 (b) What is role of dislocation in the plastic deformation of metal.

4 M

1 (c) Explain how engineering materials are classified. Explain in brief thermoplastic and thermosetting polymers.

4 M

1 (d) Explain elastomers.

4 M

Solve any three:

2 (a) What is recrystallization? Explain the factors affecting recrystallization process.

4 M

2 (b) Explain the strain hardening with curve.

4 M

2 (c) Explain hybrid composites.

4 M

2 (d) Write short note on ceramic materials.

4 M

Answer any one question from Q3 and Q4

3 (a) What is endurance limit ? Explain fatigue fracture with suitable figure. Also state the applications where fatigue strength is necessary.

6 M

3 (b) Write short notes on:
1) Poldi hardness test
2) Compression test.

7 M

4 (a) Which type of test is carried out at high temperature of metal sample under test. Also explain the related curve obtained. (Draw suitable figure).

7 M

4 (b) Write short notes on:
1) Erichson cupping test
2) Durometers.

6 M

Answer any one question from Q5 and Q6

5 (a) Explain the process of impregnation of self lubricating bearings.

4 M

5 (b) Draw a flow chart for the production of cemented tools.

5 M

5 (c) Explain the terms:
I) Flow rate
II) Apparent density.

5 M

6 (a) Describe the steps involved in manufacturing of powder metallurgy component.

5 M

6 (b) Explain the atomization process of powder manufacturing with neat sketch.

4 M

6 (c) Write a short note diamond impregnated cutting tools.

4 M

Answer any one question from Q7 and Q8

7 (a) Classify different magnetic materials, and explain any one in detail.

6 M

7 (b) Give classification of different biomaterials, and explain any one in detail with proper applications.

6 M

Write short note on (any three):

8 (a) Carbon nanotubes

4 M

8 (b) Smart materials

4 M

8 (c) Behaviour of metal at low temperature.

4 M

8 (d) Soft and hard magnetic materials.

4 M

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