GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Enrolment No.
Subject Code: 2142901
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- IV (New) EXAMINATION - WINTER 2019
Subject Name: Yarn Manufacturing - II
Date: 13/12/2019
Time: 10:30 AM TO 01:00 PM
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Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) What are the objectives of comber machine? Give the name of different types of combing machine. | 03 |
| (b) What are the objectives of speed frame? | 04 | |
| (c) Discuss the modern developments in draw frame machine. | 07 | |
| Q.2 | (a) Write the function of following terms: (1). Spacer, (2). Pressure bar. | 03 |
| (b) With a suitable sketch explain the 3 over 3 roller drafting system. | 04 | |
| (c) With a suitable diagram explain the passage of material on draw frame machine. | 07 | |
| OR | ||
| (a) With a suitable sketch discuss the bobbin building mechanism in speed frame machine. | 07 | |
| (b) Discuss the different types of top roller weighing system used in roller drafting system. | 03 | |
| (c) With a suitable sketch discuss the construction of bottom rollers of roller drafting system. | 04 | |
| Q.3 | (a) What are the function of Autoleveller? With a suitable diagram explain the working principle of open loop autoleveller. | 07 |
| OR | ||
| (a) With a suitable sketch describe the construction of combing cylinder in a comber. | 03 | |
| (b) With a suitable diagram give the explanation why even number of machines are used between card and comber. | 04 | |
| (c) Discuss the influence of the feed stock on combing process? | 07 | |
| Q4 | (a) With a suitable sketch-describe the construction of nipper assembly. | 03 |
| (b) What is forward feed and backward feed in combing operation? | 04 | |
| (c) With suitable sketch explain construction and working of modern combing preparatory machine. | 07 | |
| OR | ||
| (a) What is the difference between flyer lead and bobbin lead speed frame? | 03 | |
| (b) Explain the noil extraction theory with backward feed. | 04 | |
| (c) With a suitable sketches explain the sequence of operations in a rectilinear comber. | 07 | |
| Q.5 | (a) Write the function of following terms: (1) Condenser, (2). Apron. | 03 |
| (b) With a suitable sketch explain flyer top. | 04 | |
| (c) With suitable sketches explain the different type of flyers. | 07 | |
| OR | ||
| (a) With a sketch define presser arm in speed frame. | 03 | |
| (b) Write a short note on aprons used in speed frame machine. | 04 | |
| (c) Discuss the modern developments in speed frame machine with suitable sketches. | 07 | |
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