GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-III (New) EXAMINATION — WINTER 2018
Subject Code:2133603 Date:28/11/2018
Subject Name:Introduction to Glass & Ceramic Technology-I(Elective-I)
Time:10:30 AM TO 01:00 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) Define what is steatite and talc. | 03 |
| (b) Discuss the difference between Refractoriness & R.U.L? | 04 |
| (c) Describe the making of steatite bodies. | 07 |
| Q.2 (a) Explain the network formation in silica. | 03 |
| (b) Describe how cordierite material is derived from Beryl like structure. | 04 |
| (c) Explain the synthesis of alumina by Bayer’s process. | 07 |
| OR | |
| (c) Explain the occurrences of alumina. | 07 |
| Q.3 (a) Define sintering? | 03 |
| (b) Define normal and inverse spinel. | 04 |
| (c) Describe the difference between Conversion and Inversion. | 07 |
| OR | |
| Q.3 (a) Define Glass. | 03 |
| (b) Describe the Stanworth theory of glass network former, intermediate and modifier. | 04 |
| (c) Discuss in detail borosilicate glass. | 07 |
| Q.4 (a) What is glass? | 03 |
| (b) Define natural and sea water magnesia. | 04 |
| (c) Explain the synthesis of Sea water magnesia | 07 |
| OR | |
| Q.4 (a) Define normal & inverse spinel. | 03 |
| (b) Describe chrome ore structure. | 04 |
| (c) Explain how hydration resistance of natural magnesia be increased. | 07 |
| Q.5 (a) Discuss the polymorphic transformation of zirconia. | 03 |
| (b) Explain the difference between nucleation and growth. | 04 |
| (c) Explain classification of refractories based on porosity, acidity and mode of pressing. | 07 |
| OR | |
| Q.5 (a) Describe what is flint in brief. | 03 |
| (b) Write short notes on Vitreous silica and silica gel | 04 |
| (c) Describe network former, intermediate and modifier with examples. | 07 |
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