GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- V (New) EXAMINATION - WINTER 2019
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Subject Code: 2153614 Date: 21/11/2019
Subject Name: Glass science & Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARK | |
|---|---|
| Q.1 (a) Define the phenomenon of nucleation. | 03 |
| (b) Differ between homogeneous and heterogeneous nucleation | 04 |
| (c) Establish the empirical equation for homogeneous nucleation. | 07 |
| Q.2 (a) Define short range order of glass in comparison to long range order of a crystal. | 03 |
| (b) Explain Silicate theory of glass formation | 04 |
| (c) Explain glass formation with the plot of Enthalpy vs. Temperature. | 07 |
| OR | |
| () Explain Growth phenomena. Explain difference between nucleation and growth. | 07 |
| Q.3 (a) Define and explain annealing. | 03 |
| (b) Explain why annealing is necessary. | 04 |
| (c) Explain the nucleation model with empirical equation. | 07 |
| OR | |
| Q.3 (a) Define lithium borosilicate glass. | 03 |
| (b) Discuss in detail the finer morphology of alumino borosilicate glass system. | 04 |
| (c) Explain the working principle and methodology of Glass melting tank furnace. | 07 |
| Q.4 (a) Describe magnetic materials. | 03 |
| (b) Describe photonic materials. | 04 |
| (c) Explain refining process in detail. | 07 |
| OR | |
| Q.4 (a) Write a short note on Amber glass. | 03 |
| (b) Discuss on chalcogenide glass. | 04 |
| (c) Explain the colouration process of photosensitive glass. | 07 |
| Q.5 (a) Define fiber glass. | 03 |
| (b) Differ between E- glass and S- glass. | 04 |
| (c) Explain the role of former, fining agent, colourant in batch composition of glass. | 07 |
| OR | |
| Q.5 (a) Define amorphous materials with examples. | 03 |
| (b) State the importance of random network model for explaining glass structure | 04 |
| (c) Explain the refining phenomena in glass melt. | 07 |
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