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Spinning mill Questions Part - 1

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1. A fully mature fiber has a well-developed thick cell-wall (Yes/no)

Ans. Yes.

2. An immature fiber has a very thin cell-wall (Yes/no)

Ans. Yes.

3. In mature fiber, dye absorption is high (yes/no)
Ans. Yes

4. In immature fiber, dye absorption is low (yes/no)

Ans. Yes

5. What is staple length?

Ans. The average length of spinnable fiber is called staple length.

6. If staple length is increase then yarn quality is also increase (yes/no).

Ans. Yes

7. Toughness of fiber has a direct effect on yarn and fiber strength (yes/no)

Ans. Yes

8. If fiber strength is higher, then yarn and fabric strength is also higher (yes/ no)

Ans. Yes

9. Short fibers deteriorate the yarn strength and uniformity (true/false)

Ans. True.

10. What is the minimum strength for a textile fiber?

Ans. Approximately 6 CN/tex (about 6km breaking length)

11. What do you know about Presley index =?

Ans. Breaking load in Ibs/Bundle weight in mg.

12. What is fiber elongation?

Ans. Elongation is specified as a percentage of the starting length.

13. What is bale management?

Ans. Testing, sorting and mixing bales according to the properties of fiber for producing specific good quality yarn at minimum cost is called bale management.

14. When bale mixing is done?

Ans. Before the blow room/Before the bales going into blow room.

15. What are the basic operations in the blow room

Ans.

  • Opening
  • Cleaning
  • Mixing & blending
  • Even feed of material to the card.

16. What is carding?

Ans. Carding may be defined as the reduction of an entangled mass of fiber to a filmy web by working them between two closely spaced, relatively moving surface clothed with sharp wire points.

17. Objective of carding

Ans.

  • To open up the cotton in to single fiber state.
  • To reduce the number of neps, short fibers.
  • To produce a thick untwisted rope of fiber called sliver.

18. Carding is called the heart/mother of spinning (true/ false)

Ans. True.

19. What are the main objectives of draw frame?

Ans.

  • Straightening & parallelization of fibers by drafting & drawing.
  • Minimization of irregularity by doubling.
  • Blending & mixing of fibers.
  • To produce a more uniform sliver of definite wt/yds.

20. What are the faults of blow room?

Ans.

  • Soft lap,
  • Conical lap,
  • Barrel shaped,
  • Split lap,
  • Ragged selvedge,
  • Lap licking.

21. Find out the hank of the lap when the weight of the lap is 14 oz/yds

Ans.
14 oz contains = 1 yds,
1 oz contains = 1/14 yds,
16 oz or 1 lb contains = 16/14 yds
=16/14×840 hank=0.00136 hank
So hank of lap = 0.00136.

22. Find out the wt/yds of the lap when hank of the lap is 0.0014?

Ans.
Weight of 0.0014×840 yds = 1 lbs or 16 oz
1.176 yds = 16 oz
1 yds = 16/ 1.176 oz = 13.6 oz
So weight of lap = 13. 6 oz/yds

23. For cotton, higher the yarn count, finer the yarn (yes/no)

Ans. Yes

24. For jute, lower the count, finer the yarn (yes/ no)

Ans. Yes.

25. What is the name of combing waste?

Ans. Noils.

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