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

FirstRanker.com

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER- III (New) EXAMINATION — WINTER 2019

--- Content provided by‍ FirstRanker.com ---

Subject Code: 2132904 Date: 5/12/2019

Subject Name: Textile Processing - 1

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

--- Content provided by‌ FirstRanker.com ---

2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. (a) List the impurities present in a grey cotton fabric. MARKS
2. (b) Why can you not dye all the textile materials using a single dye?

What are the sequences of operation given to cotton grey fabric up to finishing. Discuss each process in brief.

--- Content provided by‌ FirstRanker.com ---

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

OR

1. (c) Describe jigger dyeing machine with a neat sketch.

--- Content provided by‌ FirstRanker.com ---

1. (a) Give the advantages of dyeing loose cotton.
2. (b) Describe the method for application of hot brand reactive dyes on cotton.
3. (c) Depict the construction and working of gas singeing machine.

OR

1. (a) Briefly explain about exhaustion and fixation of dyes.

--- Content provided by‌ FirstRanker.com ---

2. (b) Classify dyes according to their applications.
3. (c) Explain the terms: Saponification, Emulsification, Wetting and Detergency in context to scouring.

1. (a) Enlist water-soluble dyes.
2. (b) Discuss technological aspects involved with chlorine desizing method.

What is scouring? Enlist various methods of scoring cotton fabric and discuss any one in detail.

--- Content provided by‍ FirstRanker.com ---

OR

1. (a) What is the need of singeing process?
2. (b) State the advantages of peroxide bleaching.
3. (c) What are the enzymes? Discuss enzymatic desizing process.

1. (a) Differentiate dyes and pigments.

--- Content provided by FirstRanker.com ---

2. (b) Discuss the objectives of desizing process. Give the detail classification of desizing processes.

Elaborately discuss the process of dyeing cotton with direct dyes. Name the treatments used to improve the washing fastness of direct dyeing.

OR

1. (a) What are reactive dyes?
2. (b) Polyester fibre is difficult to dye. Why?

--- Content provided by⁠ FirstRanker.com ---

3. (c) Explain the chainless padless mercerising machine with a neat sketch.

FirstRanker.com