Download GTU BE/B.Tech 2018 Winter 7th Sem Old 172905 Fibre Science And Elements Of Textile Structure Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem Old 172905 Fibre Science And Elements Of Textile Structure Previous Question Paper

1

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (OLD) EXAMINATION ? WINTER 2018
Subject Code: 172905 Date: 06/12/2018

Subject Name: Fibre Science & Elements Of Textile Structure

Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Write in brief about Heats of sorption in fibres. 07
(b) Derive all the equations related to Porosity of fabric. 07

Q.2 (a) Discuss in detail about fundamental structural features of yarn. 07
(b) Derive equation for Pierce geometry of Plain woven fabric ?when weft is straight
and warp is not jammed.?
07
OR
(b) Discuss the technical significance of swelling in fibres & also how its measured? 07

Q.3 (a) Explain Packing of yarn. Discuss the disturbing factors in ideal packing of yarn. 07
(b) Derive the relationship between Specific Volume of yarn, Yarn Count & Twist. 07
OR
Q.3 (a) Derive: tan? = 0.0112Vy
1/2
?. 08
(b) Write short note on: Order & disorder in fibre structure. 06

Q.4 (a) Write short note on: Analysis by Correlogram. 07
(b) What are the parameters to characterize the Migration? 07
OR
Q.4 (a) Give the reasons for Differential Migration. 07
(b) Describe Hamilton method of Coil Winding. 07

Q.5 (a) Drive the equations for warp and weft cover factor in direct and indirect system. 08
(b) Write a note on fabric density and specific volume. 06
OR
Q.5 (a) Derive the equations for fabric weight. 08
(b) Discuss the Walen's method of crimp measurement. 06


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