GTU BE 2020 Summer Question Papers || Gujarat Technological University
Envlmnt No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- III EXAMINATION - SUMMER 2020
Subject Code: 3131904 Date:28/10/2020
Subject Name: Material Science and Metallurgy
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Marks | |
|---|---|
| Q.1 (a) Draw miller indices of [111] and (110). | 03 |
| (b) Define atomic packing factor (APF) and find APF for FCC material. | 04 |
| (c) Do the detailed classification of Engineering Material. | 07 |
| Q.2 (a) Grain boundary is a defect. Evaluate. | 03 |
| (b) Explain Lever rule with example. | 04 |
| (c) Explain homogeneous and heterogeneous nucleation process with neat sketch. | 07 |
| OR | |
| (c) Explain a Nucleation and growth in Solidification of metals. | 07 |
| Q.3 (a) What is solid solution? Discuss in brief types of solid solution with neat sketch. | 03 |
| (b) Write the difference between impurities and alloying elements. Write importance of alloying. | 04 |
| (c) Explain cooling curve of binary alloy forming solid solution. | 07 |
| OR | |
| Q.3 (a) Explain Point defect & Line defect. | 03 |
| (b) Explain Hume Rothay rule for substitutional solid solution. | 04 |
| (c) Explain the detail procedure of polishing the specimen for micro-examination. | 07 |
| Q.4 (a) Differentiate between Austenite and Ferrite. | 03 |
| (b) What are the limitations and capabilities of LPT | 04 |
| (c) Draw and label Iron — Iron Carbide diagram. Also explain the reactions taking place in it. | 07 |
| OR | |
| Q.4 (a) Differentiate between LPT and MPT. | 03 |
| (b) Explain the Ultrasonic Testing. | 04 |
| (c) List the common methods of powder production in powder metallurgy & discuss their influences on the properties of final product. | 07 |
| Q.5 (a) Explain macro examination. | 03 |
| (b) Differentiate between annealing and normalizing. | 04 |
| (c) Draw TTT-diagram for a steel with 0.8% carbon and show austenite to martensite transformations on it. | 07 |
| OR | |
| (a) What are the different surface heat treatment processes? What are the applications? | 03 |
| (b) Define hardenability of steel. State the factor that affect the hardenability. | 04 |
| (c) Explain the mechanism of corrosion. Also explain any one corrosion prevention technique in detail. | 07 |
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