Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2172902 Modern Weaving Technology Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2172902 Date:19/01/2021
Subject Name:Modern Weaving Technology
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) What are the yarn quality requirements for shuttle-less looms.
03
(b) Which parameters of air are to be considered for supply to air jet loom?
04
(c) State the importance of selvedges. Explain different types of selvedges 07
formed on shuttleless looms with diagram.
Q.2 (a) Monitoring and control of weaving machines by microprocessor is easier 03
way to operate the loom- Justify you answer.
(b) What are the main features of rapier weaving mechanism?
04
(c) State the importance of weft accumulators. With the help of neat diagrams, 07
explain the working of weft accumulator.
Q.3 (a) Differentiate between conventional weaving machines and modern shuttles 03
weaving machines.
(b) Write on any one type of yarn tensioning unit of modern warping machine.
04
(c) Highlight in detail the features of the state-of-the-art sizing machines.
07
Q.4 (a) How air can be measured and write about air quality?
03
(b) Compare drum type of accumulators and loop type accumulators.
04
(c) What type of fabric is woven on air jet weaving machine. Explains blowing 07
sequence of relay nozzles and lining control.
Q.5 (a) The length measuring device is necessary on air-jet looms. Give reason.
03
(b) What is the equation for drag force acting on weft yarn on air jet loom? 04
Explain briefly.
(c) Describe picking mechanism and nozzle pump design in water jet loom.
07
Q.6 (a) Discuss pre-requisites of water jet loom.
03
(b) Discuss merits and demerits of water-jet weaving machine.
04
(c) Explain the path of yam of water jet loom in warp and weft direction.
07
Q.7 (a) What are the criteria for classifying rapier looms?
03
(b) What is rapier head? Explain with diagram.
04
(c) What are the differences between gabler system and dewas system of rapier 07
loom?
Q.8 (a) How tucked in selvedge is formed on projectile loom?
03
(b) Which different types of projectiles and projectile guides are available? 04
How many projectiles are required for 360 cm. wide loom?
(c) Explain torsion bar picking mechanism of projectile loom with diagram.
07
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This post was last modified on 04 March 2021