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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER 4(NEW) • EXAMINATION SUMMER 2018
Subject Code: 3345201 Date: 30-Apr-2018
Subject Name: Drying And Firing
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Each question carry equal marks (14 marks)
Q.1

What is Drying? Explain the importance of drying in ceramic industry.
07





Explain various stages of drying.
07



Q.2

Explain different process of drying.
07





Write a short note on drying shrinkage test for green ceramic articles.
07



OR

Explain different governing factors for drying.
07



Q.3

Describe the construction and functions of rotary dryer.
07





Describe the construction Function of spray dryer.
07



OR
Q.3

Explain effect of heat on properties of ceramic wares.
07





Describe the construction function of Mangle dryers.
07



Q.4

What is firing? Explain different stages of firing.
07





List out the drying defects and explain its causes and remedies.
07



OR
Q.4

Explain thermo-chemical reactions occurred in bodies during firing.
07





Explain necessity of firing in ceramic industry.
07



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Q.5

Write down short note on Biscuit Firing and Glost Firing.
07





Define setting. Describe various methods of setting of wares.
07



OR
Q.5

Classify different types of kilns and furnaces.
07





Write short notes on waste heat utilization.
07