ANNA UNIVERSITY,BTECH VI SEMESTER TEXTILE CHEMISTRY, QUALITY ASSESSMENT OF TEXTILES

ANNA UNIVERSITY,B.TECH.VI – SEMESTER -TEXTILE CHEMISTRY

 QUALITY ASSESSMENT OF TEXTILES

 

Time: 3hrs                                                                                          Max Marks: 100

 

Answer ALL Questions

PART – A (10 x 2 = 20 marks)

 

1.Define sampling with examples.

2.What is the standard humidity and temperature conditions in a textile testing lab?

3.Define span length and effective length.

4.Define fibre maturity.

5.Define tenacity.

6.Define Tex. Convert 80s Ne into Tex.

7.What are the types of periodic variation.

8.Define fabric handle.

9.Define air permeability.

10.Define fabric drape

 

PART B (5 x 16 = 80 marks)

 

11.i)Give the aims of quality assessment.                                                            

ii)Explain various statistical techniques used for quality control of textile materials.                                                                                                                            

12.a)i)  What are the factors that contribute to biased sampling.                              

       ii)  Describe the sampling procedure for yarn and fabric.                                    

(OR)

12.b)i)  Give the importance of fibre length testing.                                                 

ii)  Describe with neat diagram the principle and measurement of fibre length using Digital fibrograph.                                                                                             

13.a)i)  What is specific stress and give it’s unit.                                                        

       ii)  Explain stress-strain curves of different textile fibres.                                  

(OR)

13.b)i)  Relate fibre fineness with maturity.                                                               

       ii)  Explain ATIRA fibre fineness tester with a neat sketch.                              

14.a)i)  What are on line and off line testing techniques.                                        

  ii)  Explain with a neat sketch, how yarn count is measured from a fabric sample.

(OR)

14.b)i)  What are the causes for yarn irregularity.                                                       

ii)  How sliver, roving and yarn irregularity is measured using Uster Evenness tester

15.a)i)  What quality parameters are tested for fabrics.                                              

       ii)  Explain the measurement of Bursting strength with a neat sketch.               

(OR)

15.b)i)  What abradent materials are used in abrasion tester.                                    

       ii)  Explain I.C.I Pill box tester with a neat sketch.                                             

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