Basic Viva For Textile Engineers (Fabric Related) Part-1

 

1. What is fabric?

Ans: Interlacement of two or more thread of yarn.

2. Categories of the woven fabric structure.

Ans: Simple structure, Complex structure.

3. What is the construction of fabric?

Ans: Warp count X Weft count/EPI X PPI X Fabric width.

4. What is texture?

Ans: Quality of fabric such as handle properties, shining properties, draping properties.

5. Texture depends on which mater?

Ans: Yarn count, EPI, PPI, Yarn twist, Interlacement etc.

6. What is contact field?

Ans: Contact points between warp & weft yarn at a right angle. (RNwa*RNwe)

7. What is interlacing field?

Ans: The points where a yarn of one system of threads changes its position in relation to other systems.

8. What is a free field?

Ans: The zone where the warp & weft yarn does not touch & change fabric side.

9. What is an open field?

Ans: Zone where warp nor weft thread occurs.

10. What is interlacing ratio?

Ans: Ratio between actual no of interlacing & maximum no of interlacing.

11. What is repeat number?

Ans: No of warp & weft yarns in a fabric.

12. What is drafting?

Ans: Drawing process of warp yarn through heald eye according to the plan or design.

13. What is lifting plan?

Ans: Selection of healds to be lifted or lowered.

14. What is skip Draft?

Ans: To make fabric with high density of warp yarn.

15. What is pointed draft?

Ans: Used to produce fabric with symmetrical design.

16. How divided draft is produced?

Ans: By dividing the heald shafts into two or more groups.

17. Why grouped draft is needed?

Ans: To producing check & strip fabric.

18. Finer yarn used as where?

Ans: As warp.

19. Coarser yarn used as where?

Ans: As weft.

20. What is twill weave?

Ans: The weave is characterized by diagonal lines of warp & weft floats on the face of the fabric on both side.

21. Some types of twil.

Ans: Zig-zag, Herring bone, Diamond, Broken, Rearrange, Stepped, Elongated, Shadded, Combined twill etc.

22. Direction of horizontal zig-zag twill.

Ans: Upon the warp yarn.

23. Is pointed draft found in horizontal zig-zag twill.

Ans: Yes.

24. Direction of vertical zig-zag twill.

Ans: Upon the weft yarn.

25. Is vertical zig-zag twill made from any complicated continuous twill?

Ans: Yes.

26. Herring bone twill.

Ans: Produced by reversal of twill direction.

27. Warp yarn is double in the no of weft yarn.

Ans: In Horizontal Herring bone twill.

28. Weft yarn is double in the no of warp yarn.

Ans: In Vertical Herring bone twill.

29. What is elongated twill?

Ans: Twill angle is less or more than 45° respect to horizontal or vertical axis.

30. Warp way elongated twill runs …

Ans: Around 45° angle.