Biju Patnaik University of Technology 2008-4th Sem B.Tech (B Tech) , textile fiber-II . - Question Paper
BPUT(B Tech) , fourth semester textile fiber-II ques. paper. Fourth Semester Examination TEXTILE FIBRE - II Full Marks-70
Time: 3 Hours
Answer Question No. 1 which is compulsory and any five from the rest.
The figures in the right-hand margin indicate marks.
1. Answer all the questions in brief: 2x10
(a) What is necking in drawing of spun filament yarn ?
(b) How the denier of melt spun filament is controlled ?
(c) Why Ti02 (titanium di-oxide) is added as additive in synthetic fibre production ?
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(d) (e) (f)  (g) l united we stand... (j) 2. (a) (b) 3. (a) |
What is the role of ZnS04 and its concentration in viscose production ? What is the difference between Nylon-6 and Nylon-66 ? What do you mean by POY ? What is its importance in synthetic fibre manufacturing ? What is polyaddition reaction ? Give example. Define micro-fibre with example. What do you understand by industrial or high performance fibres ? What is solvent texturing ? Define and compare dry, wet and melt spinning processes for man-made fibre production. 6 Discuss the factors on which the selection of man-made fibre spinning proccess depends. 4 Show the Flow-Chart for ordinary viscose fibre production and discuss the various process variables for the same. 7 |
(b) What are the popular uses of viscose rayon and similar type of fibres ? 3
4. (a) Describe with line diagram the melt spin
ning process for the production of polyester filament. 7 (b) With reference to melt spinning of polyester fibre, discuss the effects of parameters like spinneret, rate of extrusion and spinning stretch on structure of filament. 3
5. (a) Why 100% polyacrylonitrile polymer is
not meltable and soluble ? How it can be made soluble in certain solvents? 4 (b) Describe the process of acrylic fibre production through dry spinning technique.
6
6. (a) What is the need of heat setting of ther
moplastic synthetic fibres ? Explain the mechanism of heat setting of thermoplastic synthetic fibres. 5
(b) What are cold drawing and hot drawing of spun synthetic filament ? Discuss the principle of one such drawing technique.
5
7. (a) Why yarns - particularly synthetic yarns
- are textured ? Name the various techniques of yarn texturing developed so far.
4
(b) With the help of line diagram explain the process and principle of draw texturing of thermoplastic filament yarns. 6
8. (a) Make a list of high performance (indus
trial) fibres and mention their uses. 4
(b) Discuss the production technique and properties of either Kevlar or Carbon fibre.
6
CPTX 8202 4 -C
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Attachment: |
| Earning: Approval pending. |
