Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech TE (Textile Engineering) 2020 March 4th Sem Yarn Manufacture I Previous Question Paper
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(Textile Engg.) (2011 Onwards) (Sem.?4)
YARN MANUFACTURE-I
Subject Code : BTTE-401
M.Code : 71644
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Answer briefly :
a) A sliver of 2.75 is drafted in a drawing frame using 6 doubling and 8 draft. The sliver
is passes thrice through the drawframe. Calculate the linead density of the output
sliver in tex after third passage.
b) Name the different elements of a roller gin involved in ginning operation.
c) What is the basic principle of an automixer?
d) Deduce the relation between denier and tex.
e) How do you assess the performance of a card? Is it possible to parallelize fibre in a
card?
f) What is the approximate combined cleaning efficiency of card and blowroom? Also
state the cleaning efficiency of each machine.
g) In a 3 zone drafting system, state the role of the middle zone in the drafting operation.
h) With a neat diagram, discuss the teeth disposition at the cylinder doffer junction in a
card alongwith the direction of rotation of each roller.
i) Define TREX system in card giving a suitable sketch.
j) State the principles of the working of different autoleveller.
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1 | M-71644 (S2)-1663
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(Textile Engg.) (2011 Onwards) (Sem.?4)
YARN MANUFACTURE-I
Subject Code : BTTE-401
M.Code : 71644
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Answer briefly :
a) A sliver of 2.75 is drafted in a drawing frame using 6 doubling and 8 draft. The sliver
is passes thrice through the drawframe. Calculate the linead density of the output
sliver in tex after third passage.
b) Name the different elements of a roller gin involved in ginning operation.
c) What is the basic principle of an automixer?
d) Deduce the relation between denier and tex.
e) How do you assess the performance of a card? Is it possible to parallelize fibre in a
card?
f) What is the approximate combined cleaning efficiency of card and blowroom? Also
state the cleaning efficiency of each machine.
g) In a 3 zone drafting system, state the role of the middle zone in the drafting operation.
h) With a neat diagram, discuss the teeth disposition at the cylinder doffer junction in a
card alongwith the direction of rotation of each roller.
i) Define TREX system in card giving a suitable sketch.
j) State the principles of the working of different autoleveller.
2 | M-71644 (S2)-1663
SECTION-B
2. What do you mean by openness value (OV)? How it is used to assess the performance of
the blowroom operation? Discuss the other parameters, which can be judged to assess the
performance of a blowroom.
3. Show the passage of fibre in the card clearly showing the direction of rotation of rollers
and tooth disposition in the rollers. State also the objects of the different sections / zones
of a revolving flat card.
4. The production of a card is 12 lb per hour. There are 20 cards that are running to process
similar type of material. Waste taken out at each card is 5%. The hank of the lap fed
is 0.0012. Calculate at what speed, the 9 inches lap roller of a scutcher should run with an
efficiency of the machine being 90%.
5. With the help of a neat sketch describe the working of a closed loop autoleveller.
6. State two recent developments each in blowroom and in card. Discuss the significance of
such developments.
SECTION-C
7. What are the objects of blending? At which stage would you prefer to blend to produce a
polyester cotton blended yarn- explain with appropriate justification and mention the
implication of blending at other stages besides the suggested one.
8. a) What are the fibre quality requirements for ring spinning? How the requirement is
different in other spinning system? In the light of conventional spinning, give an
assessment of the influence of each parameter in deciding the quality of the product.
b) The front roller speed of a drawframe is 1960 rpm and its diameter is 38 mm. The
applied tension draft is 1.03. Calculate the production per machine for 8 hours with
80% efficiency and 013 hank of delivered sliver.
9. a) Discuss the working principle of any opener used in a blowroom. Support your
answer with necessary sketch.
b) What is drafting force? State the factors which can influence it. Write a short note on
drafting wave and roller slip wave, suggesting the measures to minimize these.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 21 March 2020