Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem Old 172905 Fibre Science And Elements Of Textile Structure Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (Old) EXAMINATION ? WINTER 2019
Subject Code: 172905 Date: 05/12/2019
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.
MARK
S
Q.1 (a) Write a brief note on fibre structure. Discuss the information to be
gathered for investigating the same.
07
(b) Write a short note on ?Swelling in fibres?. 07
Q.2 (a) Write note on heat of absorption and heat of wetting. 07
(b) Explain in detail on X-ray Diffraction Technique. 07
OR
(b) Discuss the experimental methods used to determine water retention in
fibres.
07
Q.3 (a) Discuss in detail the significance of twist in yarns. 07
(b) Explain the terms:-Primary creep, Secondary creep and explain the
viscoelastic behavior of fibres.
07
OR
Q.3 (a) Derive the relationship between Packing density and Rate of migration. 07
(b) Write a brief note on moisture absorption in textiles. 07
Q.4 (a) Discuss the Electronic microscopy techniques used for investigating
Fibre Structure.
07
(b) Discuss the order and disorder in the structure of fibre. 07
OR
Q.4 (a) Discuss the theories on Mechanical properties in man-made fibres. 07
(b) Derive Contraction in yarn Cy = ?(1+sec?) and Retraction in yarn Ry
= tan2 (?/2).
07
Q.5 (a) With a neat sketch discuss the Peirce model for plain fabric. Discuss
Fractional Cover and Total Cover.
14
OR
Q.5 (a) Discuss the special conditions of Peirce model for plain fabric when
angle (?) is small, when filling is straight and when fabric is jammed.
14
*************
FirstRanker.com - FirstRanker's Choice
This post was last modified on 20 February 2020