GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Seat No.:
Enrolment No.
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (NEW) EXAMINATION — WINTER 2018
Subject Code: 2173604
Subject Name: Whitewares-I
Time: 10:30 AM TO 01:00 PM
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) | Define tri axial body. | 03 |
| (b) | Explain different types of sintering mechanism. | 04 | |
| (c) | Define a whiteware body. Describe the role of feldspar in whitewares bodies. | 07 | |
| Q.2 | (a) | Define nucleation and its types. | 03 |
| (b) | Explain the model of homogeneous nucleation with mathematical derivation. | 04 | |
| (c) | Explain tape casting with doctor’s blade process. --- Content provided by FirstRanker.com --- ORExplain what is jollying, jiggering and extrusion. | 07 | |
| Q.3 | (a) | Describe synthesis of Sea water magnesia | 03 |
| (b) | Explain the phase diagram of Al203-SiO2 | 04 | |
| (c) | Define flint. Explain different polymorphs of Barium Titanate OR Define normal and inverse spinel. | 07 | |
| Q.4 | (a) | Describe the occurrences of chrome ore. | 03 |
| (b) | Describe the structure of chrome ore in detail | 04 | |
| (c) | What is natural magnesia? OR --- Content provided by FirstRanker.com --- Define different types of Magnesia. | 07 | |
| Q.5 | (a) | Describe occurrences of magnesia OR Define flux materials. | 03 |
| (b) | Write down the role of flux in composition. | 04 | |
| (c) | Write down the role of wollastonite, nepheline syenite and feldspar as flux. OR Define R.U.L. | 07 | |
| Q.6 | (a) | Describe the difference between R.U.L. and Creep. | 03 |
| (b) | Explain the role of silica, soda ash and alumina in soda lime silica glass --- Content provided by FirstRanker.com --- ORWhat is meant by creep? | 04 | |
| (c) | Explain enthalpy vs. temperature diagram of a glass forming melt. OR What are raw materials normally used in whiteware body making? | 07 | |
| Q.7 | (a) | Explain the parameters for raw material selection | 07 |
Date: 15/11/2018
Total Marks: 70
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