Question Paper: Material Science and Metallurgy Question Paper - Dec 18 - Mechanical Engineering (Semester 3) - Jawaharlal Nehru Technological University (JNTUH)
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Material Science and Metallurgy - Dec 18

Mechanical Engineering (Semester 3)

Total marks: 75
Total time: 3 Hours

NOTE-

This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in part A.

Part B consists of 5 units. Answer any one full question from each one unit.

Each question carries 10 marks and may have a,b,c, as sub questions.

1.a. Explain why grain boundaries look darker under the microscope while the grain look brighter?
(2 marks) 00

1.b. Draw the plane (100).
(3 marks) 00

1.c. What is the level rule?
(2 marks) 00

1.d. Differentiate between tool steel and and Die steel.
(3 marks) 00

1 e. Differentiate between Annaeling and normalising.
(2 marks) 00

1.f. Differentiate between peritectoid and Eutectiod.
(3 marks) 00

1.g. Write the composition of cartridge brass.
(2 marks) 00

1.h. Copper and AI are Highly ductile compared to Iron. Why?
(3 marks) 00

1.i. Differentiate between crystallized ceramics and cermets.
(2 marks) 00

1.j. Define ceramic and composite.
(3 marks) 00

PART-B

2.a. Write about crystallization of metals.
(5 marks) 00

2.b. What is the role of grain size on the properties of materials.
(5 marks) 00

OR

3.a. State Hume-Rothery rules for the formation of substitutional solids solutions.
(5 marks) 00

3.b. How do you determine the Miller indices? Explain it with example.
(5 marks) 00

4.a. What is phase rule? Give suitable example.
(5 marks) 00

4.b. Draw and explain Isomorphous system.
(5 marks) 00

OR

5. Write short notes on Transformation in the solid state.
(10 marks) 00

6. Draw the Fe-Fe3C diagram and label all the points,lines, temperature and reactions.
(10 marks) 00

OR

7. Draw neatly the TTT curves for Eutectiod steels.
(10 marks) 00

8.a. What is cast Iron and classify it and write the properties.
(5 marks) 00

8.b. Write notes on Al-Cu alloys.
(5 marks) 00

OR

9.a. Write obout structure, properties , heat treatment cycles and applications of titanium and its alloys.
(5 marks) 00

9.b. Explain why extensive coring occurs in brozone compared to brasses.
(5 marks) 00

10. Enumerate the characteristics, properties and application of cermets and glasses.
(10 marks) 00

OR

11. Write short notes on:

a) Metal matrix composites.

b) Fibre reinforced materials.

(10 marks) 00

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modified 4 weeks ago  • written 4 weeks ago by gravatar for bhavesh.kir24 bhavesh.kir240
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