GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019
--- Content provided by FirstRanker.com ---
Subject Code: 2182901 Date: 27/11/2019
Subject Name: Principles of Textile Processes
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
| MARKS | |
|---|---|
| Q.1 | |
| (a) Briefly explain about the cleaning efficiency of blow room? | 03 |
| (b) Write the various factors affecting motion of sley. | 04 |
| (c) Derive an equation of yarn tension at any radius ‘r’. | 07 |
| Q.2 | |
| (a) Discuss the important of size pick up. | 03 |
| (b) Is the acceleration of shuttle uniform? Why? | 04 |
| (c) Derive an equation for traveler speed. | 07 |
| OR | |
| (c) Derive an equation for sley velocity with necessary assumption. | 07 |
| Q.3 | |
| (a) What is Transfer efficiency? | 03 |
| (b) Explain only procedure to find out transfer efficiency of card. | 04 |
| (c) What is cylinder loading? Derive an equation to calculate cylinder loading. | 07 |
| OR | |
| Q.3 | |
| (a) What is perfect drafting? Why it is not achieved in conventional draw frame. | 03 |
| (b) Explain the significance of fiber acceleration behind top comb. | 04 |
| (c) Fiber length distribution at front roller of a draw frame is as follows: | 07 |
| Length of fiber in cms (I) | 5 4 3 2 1 Total No. of fibers (frequency) | 10 14 | 10 | 8 8 50 if force required withdrawing single fiber from bundle is 2.5gm and --- Content provided by FirstRanker.com --- there are 4500 fibers entering from back roller and drafting employed is12. Calculate drafting force required to raft the material. | |
| Q.4 | |
| (a) Discuss the factors affecting drafting force. | 03 |
| (b) Discuss the causes of end breaks in ring spinning. | 04 |
| (c) Discuss the comber fractionation efficiency. | 07 |
| OR | |
| Q.4 | |
| (a) Explain interrelationship between shedding and beating. | 03 |
| (b) Discuss the various factors affecting the unwinding tension. | 04 |
| (c) Explain the retardation of shuttle with hinged swell, along with necessary diagrams. | 07 |
| Q.5 | |
| (a) Explain, chase length and coil density in reference to optimizing yarn content on ring bobbin. | 03 |
| (b) Write in short on power required for picking. | 04 |
| (c) Discuss briefly effect of I/r ratio on type of movement of sley. | 07 |
| OR | |
| Q.5 | |
| (a) Derive the formula for friction forces in negative let off motion. | 03 |
| (b) Explain Alacrity with respect to picking mechanism. | 04 |
| (c) Discuss the velocity and acceleration of projectile with suitable curves. | 07 |
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University