Download GTU B.Tech 2020 Winter 5th Sem 3153621 Glass Science And Technology Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3153621 Glass Science And Technology Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3153621 Date:01/02/2021
Subject Name:Glass Science & Technology
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



MARKS
Q.1 (a) Write the condition of Zachariason for mixed oxide glass formation.
03

(b) Explain Stanworthy's Classification of Network Former, Intermediate and
04
Modifier

(c) Establish the Empirical Equation for Homogeneous Nucleation.
07



Q.2 (a) Define Glass and how it is different from Crystal.
03

(b) Differentiate between Silicate theory and Kinetic theory of Glass formation.
04

(c) Explain glass formation with the Plot of Enthalpy vs. Temperature.
07



Q.3 (a) Define and Explain Annealing of Glass.
03

(b) Explain the Refining action of glass by addition of fining agents.
04

(c) Explain the role of Network Former, Intermediate and Modifier in detail in Glass.
07



Q.4 (a) Define Borosilicate Glass.
03

(b) Write short notes on Amber Glass.
04

(c) Refer to the given glass composition: 20Na2O-80 SiO2 .Determine the quantity of
07
raw materials that can be used to make the batch composition to achieve the
above formulation in final glass.



Q.5 (a) Describe Photo sensitive glass.
03

(b) Describe short note on Spinodal decomposition that happens during phase
04
separation in glass.

(c) Explain Glass Refining Process in detail.
07



Q.6 (a) Differentiate between Soda Lime Silica glass and Borosilicate glass.
03

(b) Discuss on Chalcogenide Glass.
04

(c) Describe the Thermal Toughening Process and Chemical Toughening Process of
07
Glass.



Q.7 (a) Write short notes on Soda Lime Silica glass.
03

(b) Differ between E- glass and S- glass.
04

(c) Explain on Working point, Softening point, Annealing point and Strain Point of
07
glass.



Q.8 (a) Define amorphous materials with examples.
03

(b) State the importance of random network model for explaining glass structure
04

(c) Explain the colouration process of photosensitive glass.
07
1

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