Long Staple Spinning exam (YF 303) from the 2020 Level-3 Term-I finals at BUTEX affiliated colleges, centred on jute. Questions cover Hessian yarn flows, jute defects and grading, emulsion faults, OD batch mixers, breaker card numericals, and push bar drawing frames.
Level-3 Term-I, Final Exám-2020
Subject: Long Staple Spinning (Code: YF 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 process flow chart of Hessian jute yarn manufacturing.
(b) Discuss about the different defects of jute fiber.
(c) Briefly describe grading of jute fiber.
[4+4+4=12]
2. (a) Define emulsion. Explain the faults of emulsion.
(b) Mention the roles of oil, water and emulsifier.
(c) Describe the working principle of OD batch mixer with necessary sketch.
[3+3+6=12]
3. (a) Explain breaker carding machine of jute with neat sketch.
(b) What are the objectives of jute carding machine?