Download GTU BE/B.Tech 2019 Winter 7th Sem New 2172902 Modern Weaving Technology Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019

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Subject Code: 2172902 Date: 23/11/2019
Subject Name: Modern Weaving Technology
Time: 10:30 AM TO 01:00 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.

Q.1 (a) What are the limitations of shuttle loom. 03
(b) Write features of shuttle-less looms. 04
(c) Which are the various types of selvedges formed on shuttle-less 07

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weaving machines? Explain each of them with help of diagram.

Q.2 (a) What are the yarn quality requirements for shuttle-less looms? 03
(b) Explain weft insertion system of air jet weaving machine. 04
(c) Explain the working principle of M 8300 multi-phase looms with neat 07
sketch.

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OR

(c) What are the factors that affect the pneumatic weft propulsion in air jet 07
weaving? Explain in detail.

Q.3 (a) Compare drum type accumulator with loop type accumulators. 03
(b) Compare types of shuttles-less loom in terms of weft insertion rate. 04

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(c) Explain picking mechanism of projectile weaving machine with a neat 07
sketch.

OR

Q.3 (a) Classify of Rapier looms. 03
(b) Explain in brief the main features of projectile weaving. 04

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(c) Highlight in detail the features of the State-of-the-art sizing machines. 07

Q.4 (a) State important areas of applications of rigid rapier looms. 03
(b) Compare tip transfer with loop transfer type of weft insertion used on 04
rapier loom.
(c) Explain double rapier tip. transfer type weft insertion system with the 07

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help of neat diagram.

OR

Q.4 (a) Compare rigid rapier with flexible rapier loom. 03
(b) Explain any-one mechanism used for driving rigid rapier head with 04
diagram.

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(c) Why weft accumulators and weft measuring are an essential 07
requirement in air jet weaving machine?

Q.5 (a) Discuss about Triaxial fabrics. 03
(b) Discuss merits and demerits of water-jet weaving machine. 04
(c) Write a short note on drying of fabric in water jet weaving machine, 07

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quality of water needed and water jet width.

OR

Q.5 (a) Highlight the features of recent generation sectional warper. 03
(b) Draw a loom-timing diagram of air jet loom. 04
(c) Name any five important parts of Air Jet looms for Weft insertion. 07

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Explain the functioning of any of the three?

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