Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2173604 Whitewares I Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2173604 Date:19/01/2021
Subject Name:Whitewares-I
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) Describe effect of heating on tri axial whitewares body.
03
(b) Explain the difference between Reaction bonded and hot pressed silicon
04
nitride
(c) Describe in brief role of clay, quartz and feldspar in Tri axial body
07
Q.2 (a) Explain extrusion
03
(b) Differ between slip casting and jiggering
04
(c) Explain the Tape casting process in detail.
07
Q.3 (a) Describe synthesis of Sea water magnesia
03
(b) Explain the phase diagram of Al2O3-SiO2
04
(c) Describe the transformation toughening process of partially toughened
07
zirconia.
Q.4 (a) Define normal and inverse spinel.
03
(b) Describe the occurrences of chrome ore.
04
(c) Describe the structure of chrome ore in detail.
07
Q.5 (a) What is natural magnesia?
03
(b) Define different types of magnesia.
04
(c) Describe occurrences of magnesia
07
Q.6 (a) Define flux materials.
03
(b) Write down the role of flux in composition.
04
(c) Write down the role of wollastonie, nepheline syenite and feldspar as flux.
07
Q.7 (a) Explain polymorphic transformation of zirconia.
03
(b) Differ between fully and partially stabilized zirconia.
04
(c) Explain the role of silica, soda ash and alumina in soda lime silica glass
07
Q.8 (a) What is meant by creep?
03
(b) Explain enthalpy vs. temperature diagram of a glass forming melt.
04
(c) What are raw materials normally used in whiteware body making? Explain
07
the parameters for raw material selection
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This post was last modified on 04 March 2021