Short Staple Spinning-II exam (YE 207) from the 2023 Level-2 Term-II finals at BUTEX affiliated colleges. Includes lap former functions and faults, combing principles with machine and production numericals, speed frame winding comparisons, and ring frame production.
Level-2 Term-II, Final Exám-2023
Subject: Short Staple Spinning-II (Code: YE 207)
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 are the functions of lap former machine? Write down the characteristics of good lap.
(b) Write the faults of mini laps with causes.
(c) Why combing is necessary for higher count?
[4+4+4 = 12]
2. (a) What is the degree of combing & noil%?
(b) Discuss the basic principle for the combing machine with the figure.
(c) Find out the number of comber m/c to produce 14000 lbs/day when nips/min = 420, Feed/nip= 7mm, lap weight = 1000 grains/yd, no of head = 8, noil% = 15, efficiency = 85%.
[3+6+3 = 12]
3. (a) Define forward feed & backward feed.
(b) Differentiate between blow room lap & comber lap.
(c) What are the parameters influencing the combing operation?