Textile Engineering
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All The Useful DAE Knitting Engineers Interview Questions & Answers

Question 1. Explain shedding?

Shedding is the act of dividing the warp threads according to design into two parts, to allow the passage of shuttle/weft inserting element from one side of the loom to the other.

Question 2. List down/what are the types of shedding mechanism?

- Paddle/treadle shedding (used in hand loom)
- Tappet shedding (used in power loom)
- Dobby shedding (used in power loom, at past used in hand loom)
- Jacquard shedding (both hand & power loom are used now)
- Combined shedding

Question 3. Write down the faults of picking?

- Early picking
- Late picking
- Smash or Bang-off
- Short picking
- Harsh picking
- Shuttle flying out

Question 4. List some abbreviations?

PPM = picks per minute
PPI = picks per inch
EPI = Ends per inch
RS = Reed space

Question 5. List down the types of needle?

- Latch needle
- Bearded needle
- Compound needle

Question 6. List down the weft knitting elements?

- Needle
- Sinker
- Cam

Question 7. List the basic knitted structure?

- single jersey or plain
- 1x1 rib
- 1x1 inter lock
- 1x1 purl

Question 8. Explain back loop?

The loop where heads are above and hanks are below is called back loop.

Question 9. Explain face loop?

The loop where heads are below and hanks are above is called face loop.

Question 10. Explain warp & weft crimp?

The waviness of the yarns due to interlacing of warp and weft in producing fabric is called crimp.

Question 11. Explain weave?

Interlacement of the ends and picks with each other produces a coherent structure. The repeating pattern of interlacing is called the weave.

Question 12. List down/Classify the types of sett?

- Warp sett (No. of warp/inch)
- Weft sett (no. of weft/inch)

Question 13. Explain basic weave structures?

(i) Plain
(ii) Twill
(iii) Satin

Question 14. Explain let-off mechanism?

To unwind the equivalent length of warp sheet from the warp beams with the progress of take-up during weaving.

Question 15. Explain pick spacing?

The space occupied by a pick in fabric.

Question 16. Explain function of take-up mechanism?

To wind the already woven fabric on the cloth roller with the progress of weaving.

Question 17. Explain object of beat-up mechanism?

To push the newly inserted weft yarn (last pick) to the fell of the cloth.

Question 18. Actual production of a m/c is always less than that calculated production?

True

Question 19. Explain picking?

To propel the shuttle or any other weft inserting elements.

Question 20. List the types of power loom?

- Modern/shuttle less loom
- Conventional/shuttle loom

Question 21. List the types of loom?

- Hand loom
- Power loom

Question 22. Explain sizing?

Sizing is the process of giving a protective coating on the warp yarn to minimize yarn breakage during weaving.

Question 23. What materials form the base of the size?

Starch or gum

Question 24. Which are maximum numbers of warp threads controlling capacity in Jacquard loom?

1800

Question 25. Which types of design can be produced by Jacquard looms?

Any design

Question 26. Dobby shedding mechanism can produce both square and rectangular size design?

Yes

Question 27. What are maximum numbers of held frame controlling capacity in tapped shedding mechanism?

14

Question 28. One picking tapped insert one pick?

True

Question 29. Explain result of unequal shedding?

Wrong design & stitching

Question 30. One shedding + one picking + one beating =?

One weaving cycle/ loom cycle/picks cycle

Question 31. Where the semi-open shed is used?

Double lift dobby & Jacquard.

Question 32. Where bottom & center close shed are used?

Hand jacquard looms to produce delicate fabrics.

Question 33. Explain tertiary motion?

The tertiary motion are as follows-
- Warp stop motion
- Weft stop motion
- Warp protector
- Weft protector

Question 34. Explain secondary motion?

The secondary motion are as follows:
Let off
Take-up

Question 35. Explain primary motion?

The primary motion are as follows-
- Shedding
- Picking
- Beating

Question 36. Explain fabric?

Interlacement of two or more thread of yarn.

Question 37. Where the open shed is used?

Tapped loom

Question 38. Can we produce basic weave structures (i.e plain, twills satin) in tapped shedding?

Yes

Question 39. Normally tapped shedding mechanism produces square design (e.g. 4x4, 6x6, 7x7, etc.)
Yes or no?

Yes

Question 40. List down/ what are the different types of shed?

- Bottom close shed
- Center close shed
- Semi-open shed
- Open shed

Question 41. List down the loom driving system?

- Hand driving (hand loom) &
- Electric motor driving (power loom)

Question 42. What is other name of warp yarn?

Ends

Question 43. Is weaving fabric produce by interlacing?

Yes

Question 44. Tell me in which knitting, a fabric is produce by single yarn?

Weft knitting

Question 45. Is knitting fabric produce by inter looping?

Yes

Question 46. Tell me how many sets of yarn are used in weaving?

Two sets (warp and weft).

Question 47. Is yarn preparation is needed in knitting?

No.

Question 48. List down the types/ classification of knitting?

Two types:
- Warp knitting
- Weft knitting.

Question 49. Is sizing required in knitted fabric?

No

Question 50. Tell me how many sets of yarn are used in knitting?

One set (warp or weft).

Question 51. Explain knitting?

It is the process of producing fabric by transferring continuous yarns into interlocking loops, each row of loop hanging from the one immediately preceding it.

Question 52. Explain weaving?

The process of interlacing two sets of yarns namely warp and weft, at right angle to make a fabric, according to design.