GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Envlmnt No.
BE - SEMESTER- III (New) EXAMINATION — WINTER 2019
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Subject Code: 3132107 Date: 3/12/2019
Subject Name: Introduction to Materials Engineering
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Marks | |
|---|---|
| Q.1 (a) Differentiate between metallurgy and material science. | 03 |
| (b) What do you mean by technological properties? List the properties and explain any two in detail | 04 |
| (c) List the criteria for selection of an engineering materials. Explain any three in detail | 07 |
| Q.2 (a) Differentiate between ductility and malleability. | 03 |
| (b) Diferentiate between stress and strain. | 04 |
| (c) Write short note on Rolling. | 07 |
| OR | |
| (c) Distinguish between the properties of ceramics, metals and plastics | 07 |
| Q.3 (a) Suggest combination of properties required for the following objects | 03 |
| 1.Hammer 2.Al wire 3. Gold ornaments 4. Copper wire for electrical cable | |
| (b) Differentiate crystalline and non-crystalline materials | 04 |
| (c) Calculate the atomic radius of Simple cubic,FCC and BCC structure | 07 |
| OR | |
| Q.3 (a) Draw the schematic figure of extrusion process. | 03 |
| (b) Differentiate the edge dislocation and screw dislocation | 04 |
| (c) What do you mean by imperfection in crystals? Explain briefly the different types of crystal imperfections | 07 |
| Q.4 (a) Write different steps of investigation of material failure. | 03 |
| (b) What is casting? Write different steps of production of foundry. | 04 |
| (c) Select the material for making handle of screw driver and justify the selection of material in context of properties requirement according to application | 07 |
| OR | |
| Q4 (a) Being human of 21* century it is difficult to survive without metals/materials. Justify the statement. | 03 |
| (b) List the advantages and limitation of powder metallurgy. | 04 |
| (c) State the role of metallurgy Engineer in industries. List out various metallurgical industries in India. | 07 |
| Q.5 (a) Differentiate between soldering and brazing. | 03 |
| (b) State different welding techniques used for fabrication work | 04 |
| (c) What is welding? Explain SMAW in detail. | 07 |
| OR | |
| Q.5 (a) List the characteristics of brittle failure in metal alloys. | 03 |
| (b) Write brief note on forging. | 04 |
| (c) Write short note on deep drawing operation. | 07 |
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