Modern Yarn Manufacturing paper (YE 401) from BUTEX affiliated colleges' 2021 Level-4 Term-I finals. Questions address open end spinning principles, rotor requirements, Rieter COM4 compact spinning, wrap yarn properties, air vortex systems, and blend spinning flows.
Level-4 Term-I, Final Exám-2021
Subject: Modern Yarn Manufacturing (Code: YE 401)
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) Discuss the historical background of modern spinning system in brief.
(b) Define open end spinning and distinguish between open end spinning and conventional spinning.
(c) Explain the basic principle of yarn formation of open end spinning.
[4+4+4 = 12]
2. (a) Mention the tasks of rotor spinning machine.
(b) What types of raw materials used in rotor spinning?
(c) What are the requirements of rotor bearing?
(d) Explain the influence of rotor diameter on rotor speed and yarn count.
[3+3+3+3 = 12]