Modern Yarn Manufacturing paper (YE 401), 2022 Level-4 Term-I, BUTEX affiliated colleges. Questions address open end spinning flows, rotor parameters, Rieter compact spinning, DREF-2000 friction spinning, and air vortex systems.
Level-4 Term-I, Final Exám-2022
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) What is open end spinning? Write the process flow of open-end spinning.
(b) Mention the advantages and disadvantages of new spinning systems.
(c) Write the essential features of open-end spinning process.
(d) Describe the working principle of rotor spinning machine with figure.
[2.5+2.5+2+5 = 12]
2. (a) Define rotor. Write the important parameters of rotor.
(b) Mention the name of some conventional and modern spinning system.
(c) What is rotor groove? State the effect of rotor groove on yarn characteristics.
(d) Calculate production/shift of five rotor spinning machines. (Assume necessary data).
[3+2+3+4 = 12]
3. (a) What do you mean by the spinning triangle? Discuss the effects of the short and long spinning triangles on yarn properties.
(b) Explain the working procedure of a compact spinning machine developed by Rieter.