Download GTU BE/B.Tech 2018 Winter 4th Sem New 2142901 Yarn Manufacturing Ii Question Paper

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Subject Code: 2142901
GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-1V (NEW) EXAMINATION - WINTER 2018
Subject Name: Yarn Manufacturing - II
Date: 05/12/2018
Time: 02:30 PM TO 05:00 PM
Total Marks: 70

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

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(A) What Is The Objects Of Draw Frame?
(B) With Neat Sketch Explain The Passage Of Material On Draw Frame Machine.
(C) Explain The Sequence Of Operation In A Rectilinear Comber.

Q.2
(A) Write Down The Formula To Calculate The Production Of Draw Frame In Kgs/Shift.

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(B) What Is Bobbin Lead And Flyer Lead. Discuss
(C) Mention Various Types Of Drafting System Used In Draw Frame. With A Suitable Diagram Explain The 3 Over 3 Roller Drafting System Used In Draw Frame.

Q.2
OR
(A) Explain Various Comber Settings.

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(B) Briefly Explain Suction System For Drafting Arrangement In Drawframe
(C) Which Parameters Are Influence In The Feed Stock On Combing?

Q.3
(A) Write Short Note On Drafting Wave. Also Suggest Steps To Control The Problem.
(B) Why Even Number Of Machines Are Used Between Card And Comber?

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(C) Discuss The Latest Developments On A Drawframe Machine.

Q.3
OR
(A) Write Short Note On 1) Open Loop Autoleveller 2) Close Loop Autoleveller.
(B) What Is Forward Feed And Backward Feed In Comber.

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(C) Explain The Working Of Autoleveller On Drawframe.

Q4
(A) Write A Short Note On Modern Lap Preparation Systems.
(B) Enlist Object Of Speedframe
(C) Calculate Speed Frame Production In Pound/Shift/Spindle And Draft From Following Data:

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Flyer Speed: 1200rpm
Sliver Hank: 0.16
Roving Hank: 2
TM: 1.2
Efficiency: 85%

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Q4
OR
(A) State The Objectives Of Builder Motion At Speedframe And Explain How It Is Achieved With A Neat Sketch.

Q5
(A) Write The Function Of The Following Elements Used In Roving Frame:

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1) Spacer; 2) Condenser; 3) Flyer Tops
(B) Calculate Comber Production In Kg/Day/Machine From The Following Data:
Type Of Feed: Backward.
Feed/Nip 6 Mm
Waste Percentage: 16

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Comber Speed: 425 Nips/Min
Comber Lap Hank :- 0.0125
Efficiency: 88%
Maximum Fiber Length (Fm): 40mm
(C) Discuss The Various Parameters Influencing Combing Operation.

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Q5
OR
(A) Write The Function Of Pressure Bar Used In Drafting System Of Draw Frame Machine.
(B) Write On The Latest Developments In The Speedframe Machine.
(C) Explain Passage Of Material On Super Lap Former.

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