Modern Yarn Manufacturing paper (YE 401), 2023, from BUTEX affiliated colleges' Level-4 Term-I finals. Candidates compared rotor, air jet MJS, friction DREF-2000, and wrap spinning systems, including rotor groove effects on yarn quality.
Level-4 Term-I, Final Exám-2023
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 advantages and disadvantages 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 rotor spinning.
[4+4+4=12]
2. (a) What is rotor groove? State the effect of rotor groove on yarn characteristics.
(b) Show the graphical representation of relationship between rotor speeds and yarn strength.
(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]