Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2132904 Textile Processing I Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 2132904 Textile Processing I Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 2132904 Date: 5/12/2019

Subject Name: Textile Processing - I
Time: 02:30 PM TO 05:00 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 (a) List the impurities present in a grey cotton fabric.
3
(b) Why can you not dye all the textile materials using a single dye?
4
(c)
What are the sequences of operation given to cotton grey fabric up to finishing.
Discuss each process in brief.
7


Q.2 (a) What is bleaching?
3
(b) Discuss the process of rot steeping desizing.
4
(c) Explain different types of bleaching agents and their importance.
7
OR

(c) Describe jigger dyeing machine with a neat sketch.
7
Q.3 (a) Give the advantages of dyeing loose cotton.
3
(b) Describe the method for application of hot brand reactive dyes on cotton.
4
(c) Depict the construction and working of gas singeing machine.
7
OR

Q.3 (a) Briefly explain about exhaustion and fixation of dyes.
3
(b) Classify dyes according to their applications. 4
(c)
Explain the terms: Saponification, Emulsification, Wetting and Detergency in context
to scouring.
7
Q.4 (a) Enlist water-soluble dyes.
3
(b) Discuss technological aspects involved with chlorine desizing method.
4
(c)
What is scouring? Enlist various methods of scoring cotton fabric and discuss any one
in detail.
7
OR

Q.4 (a) What is the need of singeing process?
3
(b) State the advantages of peroxide bleaching.
4
(c) What are the enzymes? Discuss enzymatic desizing process.
7
Q.5 (a) Differentiate dyes and pigments.
3
(b)
Discuss the objectives of desizing process. Give the detail classification of desizing
processes.
4
(c)
Elaborately discuss the process of dyeing cotton with direct dyes. Name the treatments
used to improve the washing fastness of direct dyeing.
7
OR

Q.5 (a) What are reactive dyes?
3
(b) Polyester fibre is difficult to dye. Why?
4
(c) Explain the chainless padless mercerising machine with a neat sketch.
7
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