Process And Quality Control In Spinning 5th ND12 TT2302

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ANNA UNIVERSITY CHENNAI

BE/BTECH DEGREE EXAMINATION ,NOVEMBER/DECEMBER 2012

TEXTILE TECHNOLOGY

TT 2302/080340067/10155 TT505 PROCESS AND QUALITY CONTROL IN SPINNING

Fifth semester

(REGULATION 2008 )

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PART A (10*2 =20)

1 .Out line the role of quality and process control in spinning.
2. Write the quality norms for fiber properties to spin yarn of 60s Ne.
3. What is the effect of increasing cylinder speed on quality and waste extraction at cards?
4. What is fiber quality index? State its applications.
5. How will you assess the combing efficiency?
6. What is unilateral feeding? What is its significance?
7. What are the causes of periodic variation?
8. "CV% is better measure for of unevenness than U%?". why?
9. What is the effect of RH on ring spinning productivity?
10. What is snap study?

PART B - (5*16 = 80 marks)

11 (a) Explain the process quality control in spinning with key variables for each process .(16)
Or
(b) Discuss in detail application of statistical techniques in process and quality control with examples.(16)

12 (a) Explain the application of linear programming techniques in a mill to control mixing uniformity(16)
or
(b) Discuss the following i) nep removal in carding and combing machines (8)
ii) online monitoring and control of neps on modern cards.(8)

13 (a). How does the performance of bow room and carding assessed? Compare with norms and give remarks of collected waste and cleaning efficiency.(16)
or
(b) How will you optimize comber noils? What is the effect of important setting and their influence their influence on noil extraction?(16)

14 (a) Analyse the types of spectrogram with examples and discuss the source and remedy.(16)
or
(b) Discuss the following i) Assessment of within and between bobbin count variation (8)
ii) Classification of yarn imperfection and faults by Classimat.(8)

15 (a) Discuss in detail the various methods for maximizing the production in spinning machinery.(16)
or
(b) Discuss the following :
i) Ring frame process parameter on yarn quality (8).
ii) Causes and control of end breaks in spinning (8)