1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER-VII(NEW) • EXAMINATION WINTER 2016
Subject Code:2173604 Date:18/11/2016
Subject Name:Whitewares-I(Department Elective VII)
Time: 10.30 AM to 1.00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1
Short Questions
14
1
Write the formula of steatite.
2
Write the chemical composition of lead glass
3
Write the formula of wolastonite
4
Write the formula of kaolinite
5
Write the formula of martensite.
6
Write the formula of ledeburite
7
Give an example of eutectic reaction.
8
Write the formula of nacrite.
9
Write the formula of albite.
10
Write the formula of anorthite.
11
Write the formula of orthoclase.
12
Write the formula of barium feldspar.
13
Write the formula of pyrophilite.
14
Write the formula of lepidolite.
Q.2

What is meant by creep?
03

Describe the difference between R.U.L. and Creep.
04

Explain transformation toughening of zirconia bodies.
07
OR

Explain enthalpy vs. temperature diagram.
07
Q.3

Define a whiteware body.
03

Describe the role of feldspar in whitewares bodies.
04

Explain different types of sintering mechanism.
07
OR
Q.3

Explain nucleation phenomena
03

Explain difference between nucleation and growth.
04

Explain the model of homogeneous nucleation with mathematical derivation
07
Q.4

Define flint.
03

Explain different polymorphs of Barium Titanate.
04
2

Explain the phase diagram of Al2O3-SiO2
07
OR
Q.4

Define normal and inverse spinel.
03

Describe the occurrences of chrome ore.
04

Describe the structure of chrome ore in detail.
07
Q.5

Define different types of Magnesia
03

Describe occurrences of magnesia.
04

Describe synthesis of Sea water magnesia.
07
OR
Q.5

What are raw materials normally used in whiteware body making?
03

Explain the parameters for raw material selection.
04

Explain the role of silica, soda ash and alumina in soda lime silica glass.
07