Seat No.:
Subject Code: 3152901
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Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION - WINTER 2020
Subject Name: Yarn Manufacture I11
Time: 10:30 AM TO 12:30 PM
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Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) What are the objectives of the ring spinning? [03]
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(b) What is spinning triangle? How it affects end down rate on ring frame? [04]
(c) With the suitable sketch explain the material passage in ring frame. [07]
Q.2 (a) How the spinning triangle influences yarn structure? [03]
(b) Based on the Spinning balloon theory discuss the basic conditions required for the stable spinning. [04]
(c) Draw a labeled sketch of traveler and define the following different parts: [07]
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(i) Bow, (ii) Traveler Circle, (iii) Centre of Gravity, (iv) Center of Symmetry, & (v) Horns.
Q.3 (a) What are the function of ring and traveler? [03]
(b) With the suitable sketch explain the construction of bottom rollers used in drafting system. [04]
(c) Give the classification of the ring used in the ring frame machine with suitable sketches. [07]
Q.4 (a) What is Twist? Enlist different types of twist used in spinning. [03]
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(b) Discuss the advantages of Orbit ring and traveller. [04]
(c) With a suitable diagram explain the basic features of an umbrella creel. [07]
Q.5 (a) With a suitable sketch explain the function of a Traveller clearer. [03]
(b) Discuss the advantages and disadvantages of the long and short apron used in drafting system. [04]
(c) With suitable sketches explain automatic doffing operation in Ring frame. [07]
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Q.6 (a) Discuss the materials are used for the manufacturing (composition) of ring? [03]
(b) What are the functions of Balloon checking ring and separators used between spindles? [04]
(c) Explain the principle of TFO. With a suitable diagram explain the passage of material in TFO. [07]
Q.7 (a) What is Fancy yarn? Write different uses of fancy yarn. [03]
(b) What is Doubling? Enlist different types of doubling. [04]
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(c) What is the Compact Spinning? Discuss the advantages of compact spinning. [07]
Q.8 (a) Discuss the structure of Gimp yarn. [03]
(b) With the suitable sketches discuss structure of Loop yarn. [04]
(c) With suitable diagrams explain the production of any two fancy yarns. [07]
Date: 27/01/2021
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Total Marks: 56
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