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

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

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?III (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2132904 Date: 18/06/2019

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.

Q.1 (a) Explain the following terms:
i. M.L.R ii. Shade percentage
03
(b) Write in short on grey fabric inspection. 04
(c) Write shorts notes:
i. Scouring of colored Woven Goods ii. Exhausting Agents
07

Q.2 (a) Draw process flow of textile wet processing department. 03
(b) Explain the following terms :
i. Concentration and exhaustion of a dyeing bath.
ii. Cross dyeing and Topping
04
(c) Justify the significance of J-box in scouring of cellulosic fibres and their blends
with the help of proper sketch and process sequence and parameters.
07
OR
(c) Discuss yarn dyeing machines with sketch, process parameters and the
precautionary measures.
07
Q.3 (a) What is singeing and why it is required to be carried out for some of the fabrics? 03
(b) Provide meaning of following terms:
i. Saponification ii. Surfactant iii. Mercerization iv. Emulsification
04
(c) Write short notes on
i. Shearing Process ii. Padding Mangle
07
OR
Q.3 (a) Give the advantages of dyeing loose cotton. 03
(b) Describe the process of dyeing Polyester fabrics by carrier dyeing. 04
(c) Define Dyeing. Classify the Coloring matter. Also write about different types of
dyes used for different fibres.
07

Q.4 (a) Explain the objectives of desizing. 03
(b) Discuss the process of rot steeping desizing. 04
(c) Describe Stepwise dyeing of Disperse dyes. 07
OR
Q.4 (a) Give the classification of dyes along with fiber types. 03
(b) Write a note on scouring of colored woven goods. 04
(c) Discuss, with neat sketch and principle, Jigger Dyeing Machine with its positive
and negative aspects.
07

Q.5 (a) What is stripping? 03
(b) Compare hypochlorite and peroxide bleaching. 04
(c) Discuss Hydrogen Peroxide bleaching in relation to its recipe and process
conditions.
07
OR
Q.5 (a) Give the properties of vat dyes. 03
(b) Describe the process of dyeing nylon material. 04
(c) Explain why desizing is necessary. Enlist various desizing processes. Describe
the process of Acid desizing.
07

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