Long Staple Spinning paper (YE 303) from BUTEX affiliated colleges' 2021 Level-3 Term-I finals. Includes jute fibre defects, batch selection factors, OD automatic batch mixer working, softener machines, piling objects, and card and drawing frame production calculations.
Level-3 Term-I, Final Exám-2021
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) Define Jute fibre and state the general feature of Jute fibre.
(b) Discuss about the various defects of Jute fibre.
(c) Write the factors considered for batch selection.
(d) State the process flow chart of Jute yarn manufacturing.
[3+4+2+3 = 12]
2. (a) Why emulsion is applied on Jute fibre?
(b) Discuss about the characteristics of good quality emulsion.
(c) Explain the working principle of OD Automatic batch mixer machine with figure.
(d) Find out the production of batched jute from a goods spreader machine per hour from the following data:
Weight of jute at feed 550 lbs/100 yds, Draft 10, Emulsion applied 20%, Delivery surface speed 72 yds/minute, Efficiency 80%, Short fibre loss 2%.
[1+2+5+4 = 12]
3. (a) Explain the mechanism of the softener machine with a neat sketch.
(b) What is Piling? Write down the objects of Piling.