Long Staple Spinning paper (YE 303) from BUTEX's 2024 Level-3 Term-I finals, centred on jute processing. Questions include batching oil requirements, emulsion recipe design, spreader machines, carding actions, and finisher card production calculations.
Level-3 Term-I, Final Exám-2024
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) Mention the main characteristics of different jute fibers.
(b) Why jute fiber is called bast and composite fiber?
(c) Write the jute yarn manufacturing flowchart.
(d) Explain different types of jute yarn.
[3+2+4+3=12]
2. (a) Write down the requirements of good jute batching oil.
(b) What is emulsion? Write a recipe for emulsion to process good-quality jute fiber with considering 1% oil will stay on the final yarn but 16% emulsion needs to be applied on jute fiber during softening.
(c) Describe the jute spreader machine with a figure.
[2+4+6=12]
3. (a) Discuss the necessity of pilling for emulsified jute fiber. Write down the condition of pilling for different quality jute fiber.