GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Name: Man Made Fibre Technology
Time: 02:30 PM TO 05:00 PM Total Marks: 70
3. Figures to the right indicate full marks.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (NEW) EXAMINATION - SUMMER 2019
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Subject Code: 2152907 Date: 19/06/2019Subject Name: Man Made Fibre Technology
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
| MARKS | |
| Q.1 (a) Describe important properties of man made fibres which has made it very popular. | 03 |
| (b) Discuss in brief about thermal transition. | 04 |
| (c) With a neat sketch describe process of air jet texturising. | 07 |
| Q.2 (a) Explain crystalanity and orientation in manmade fibres. | 03 |
| (b) Discuss briefly about fibres with noncircular cross section and hollow fibres. | 04 |
| (c) With a neat sketch describe turbo stapler. | 07 |
| OR | |
| (c) Describe super micro filaments and its production technique. | 07 |
| Q.3 (a) Mention different routes through which polyester can be made flame retardant. | 03 |
| (b) Discuss briefly about fibres with microvoids and microcraters. | 04 |
| (c) List out various methods of spin finish and describe any two methods briefly with neat sketch. | 07 |
| OR | |
| Q.3 (a) Describe method to produce antistatic nylon. | 03 |
| (b) Describe role of spin finish and its composition. | 04 |
| (c) What is heat setting and why it is carried out ? Hence describe temporary sett. Also state its limitation. | 07 |
| Q.4 (a) State the types of aramid fibres. Hence state their applications. | 03 |
| (b) Write a short note on metal fibres. | 04 |
| (c) Describe briefly manufacturing process of tyre cords. | 07 |
| OR | |
| Q.4 (a) Describe applications of kynol fibres. | 03 |
| (b) Write a short note on carbon fibres. | 04 |
| (c) State different varieties of glass fibres . Discuss important properties and applications of glass fibres. | 07 |
| Q.5 (a) State the objects of texturising. | 03 |
| (b) Describe gear crimping briefly. | 04 |
| (c) Describe false twist texturising process with neat sketch. | 07 |
| OR | |
| Q.5 (a) Describe briefly defects in false twist textured yarn. | 03 |
| (b) Describe important process variables in false twist texturising. | 04 |
| (c) With a neat sketch describe stuffer box texturising. | 07 |
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