Name of the University : West Bengal University of Technology
Department : Apparel Production Management
Degree : B.Tech
Sem : IV
Subject Code/Name : APM-404/Textile Wet Processing – II
Website : wbut.ac.in
Document Type : Previous Year Examination Question Paper
Download Model/Sample Question Paper :
2009 : https://www.pdfquestion.in/uploads/qpaper.wbut.ac.in/6322-2009APM-404.pdf
2010 : https://www.pdfquestion.in/uploads/qpaper.wbut.ac.in/6322-2010APM%20-%20404.pdf
2011 : https://www.pdfquestion.in/uploads/qpaper.wbut.ac.in/6322-2011APM-404(1).pdf
WBUT Textile Wet Processing – II Question Paper
Engineering & Management Examinations, June – 2009 :
Semester – 4
Time : 3 Hours
Full Marks : 70
** The figures in the margin indicate full marks.
** Candidates are required to give their answers in their own words as far as practicable.
Related : West Bengal University of Technology APM406 Pattern Making B.Tech Question Paper : www.pdfquestion.in/6320.html
GROUP – A
( Objective Type Questions )
1. State the functions of the following chemicals and auxiliaries used in textile printing and finishing : 10 × 1 = 10
i) Natural gum and Gum-Arabic.
ii) Polyacrylic acid emulsion.
iii) Urea.
iv) Rongolite-C ( Sodium or Zinc sulphoxylate formaldehyde )
v) Fixer-CCL ( Melamin formaldehyde resin )
vi) Poly-oxo-ethylene emulsion.
vii) Dimethyl-poly-siloxane.
viii) Di-ammonium phosphate.
ix) DMDHEU ( Dimethyl-di-hydroxyethylene urea ).
x) Acramin-SLN ( Polyacrylate emulsion ).
GROUP – B
( Short Answer Questions )
Answer any three of the following : 3 × 5 = 15
2. Discuss different styles of textile printing with examples. 5
3. Discuss the role of thickener in print paste. Briefly mention different types of thickness giving example for each. 3 + 2
4. Briefly discuss the effects of calendering of textile fabrics by using different types of calendering machines. 5
5. Why creases formed in cotton textiles ? How crease formation can be presented for cotton fabric by different approaches of crease resistant finish ? 2 + 3
6. Distinguish flame retardant and flame proof textiles. Define the terms “flame spread time”, “After-glow” and “char length”, used for evaluating performance of flame retardant textiles. 2 + 3
7. Discuss the different types of chemical softeners and their characteristics, advantages and disadvantages of one over other. 5
GROUP – C
( Long Answer Type Questions )
Answer any three questions. : 3 × 15 = 45
8. a) Distinguish between dyeing and printing. 2
b) Name the different methods of printing. 3
c) Describe the working of a roller printing or a rotary screen printing machine, with a neat labelled schematic diagram. 10
9. a) With the help of schematic diagram, explain the fundamental mechanism of screen printing and state the various factors responsible in controlling hydrodynamic pressure in the print paste during printing. 10
b) Discuss the role of different ingredient and thickener usually used in textile printing in general with special reference to printing of cotton fabric with any particular dye or pigment. 5
10. a) Why and when softeners are required to be applied on textile materials ? How chemical softener does its function on textiles ? 2 + 2
b) What are the required essential properties of a chemical softener ? 3
c) Name the various classes of softeners and give example for each. 4
d) What are ‘Silicone softener’ and what are the advantages of silicone softeners over anionic or cationic softeners ?
Textile Wet Processing – II – 2010 :
Time Allotted : 3 Hours
Full Marks : 70
** The figures in the margin indicate full marks.
** Candidates are required to give their answers in their own words as far as practicable.
GROUP – A : ( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following : 10 × 1 = 10
i) Alginate thickener is use for printing of cotton fabric with reactive dye, because
a) it contains higher amount of – OH groups
b) less amount of – OH groups.
ii) ‘Doctor Steak’ a fault of printed fabric is
a) linear lines
b) wavy lines.
iii) Function of doctor blade is to remove
a) printing paste from smooth surface of engraved roller
b) loose fibres, dirt etc. from engraved roller.
iv) Discharge printing is
a) style of printing
b) method of printing.
v) Photosensitizer is
a) an ingredient of printing paste
b) a catalyst used in screen preparation.
vi) Decating is a
a) mechanical finishing
b) chemical finishing.
vii) Fabric made from fine cotton will wrinkle
a) less
b) more.
viii) DMDHEU is applied on cellulosic fabric for
a) improving crease recovery property
b) improving antimicrobial property.
ix) Durability of laundering is higher for
a) anionic softener
b) cationic softener.
x) Boric acid
GROUP – B : ( Short Answer Type Questions )
Answer any three of the following : 3 × 5 = 15
2. Write down the different styles of printing and different methods of printing.
3. Discuss the different faults generally generated in roller printing machine.
4. What do you know about quality of a thickener ? Write the functions of carrier and swelling agent ?
5. Explain the different flame retardant mechanism by flame retardant chemicals.
6. What are the various water pollution parameters of effluent water to be monitored for control of water pollution ?
7. Define water repellant fabric and water proof fabric with examples. What do you mean by the term ‘Lotus Effect’ ?
GROUP – C : ( Long Answer Type Questions )
Answer any three of the following : 3 × 15 = 45
8. a) Describe the different steps to textile printing screen production.
b) Describe the different control points which control the flow of printing paste through the screen.
c) Describe the working principle of roller printing machine with help of schematic diagram. 6 + 3 + 6
9. a) What is transfer printing ? “Transfer printing is a commercial decision”. Justify the statement.
b) Discuss the different transfer printing mechanism.
c) Discuss the selection criteria’s of transfer printing dyes.
d) Write the properties should have in transfer printing paper. 5 + 5 + 3 + 2
10. a) Write the changes which occurs in fabric after calendaring.
b) What are the basic differences between swizzing calendar and chasing calendar ? Explain with suitable schematic diagrams.
c) How you will give durable embossing finishing on natural fibre and synthetic fibre ? 3 + 7 + 5
11. Write short notes on any three of the following : 3 × 5
a) Sanforizing
b) Corduroy cutting
c) Decating
d) Silicon softener
e) Moth proofing of wool and silk.
f) BOD and COD.
12. a) Briefly explain the mechanism of creasing of cellulosic fibre with necessary representative formula.
b) Discuss the factors which affect the wrinkle behaviour of a fabric.
c) Explain the crease recovery mechanism of cellulosic fibre. 5 + 5 + 5
13. a) Describe briefly the function and working principle of softening agent on textile material.
b) What are the properties should have a good softener ?
c) Discuss the different kind of softening agents with example and their advantages and disadvantages. 4 + 3 + 8