Short Staple Spinning-II paper (YME 321) from BUTEX affiliated colleges' 2020 Level-3 Term-I finals, worth 105 marks. Questions address lap former machines, the combing cycle with production calculations, speed frame drafting, and ring frame principles.
Level-3 Term-I, Final Exám-2020
Subject: Short Staple Spinning-II (Code: YME 321)
Time: 3.0 Hrs. Full Marks: 105
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) What are the functions of lap former machine? Write down the characteristics of good lap.
(b) Describe the working principle of a lap former with suitable figure.
(c) Write down the faults of lap forming.
[(4+4)+6+3.5=17.5]
2. (a) Write down the functions of combing machine.
(b) Explain combing cycle with appropriate sketch.
(c) What is Index wheel?
(d) If nip/min = 220, no of heads = 8, feed/nip = 7 mm, lap weight = 1000 grains/yds, efficiency = 90%, noil = 15%, calculate the production per day per comber.
[4+7+2.5+4=17.5]