Long Staple Spinning exam (YE 303) from the 2022 Level-3 Term-I finals at BUTEX affiliated colleges, focused on jute processing. Includes emulsion characteristics, spreader efficiency calculations, breaker and finisher card machines, and drawing process factors.
Level-3 Term-I, Final Exám-2022
Subject: Long Staple Spinning (Code: YE 303)
Time: 3.0 Hrs. Full Marks: 72
(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) Write down the flow chart of jute yarn manufacturing.
(b) What is Emulsion? Discuss the characteristics of good quality emulsion.
(c) Determine jute spreader machine efficiency, if delivery speed 68 yds/min, production 1958 lbs/hr, feed weight 5 lbs/yds, Draft 10 and emulsion 20%.
[4+4+4=12]
2. (a) Explain the mechanism of the spreader machine with a neat sketch.
(b) Write short notes on: (i) Clock length (ii) Dollop weight.
(c) Find the production in lbs/hr of softener machine delivered speed = 60 yds/min, Draft = 12, Efficiency = 80%, emulsion applied = 20%, Wt of feed material = 6 lbs/yds.
[4+4+4=12]
3. (a) State the dissimilarities between jute carding and cotton carding process.
(b) Describe the working principle of finisher card machine with neat sketch.