Basic Viva for Textile Engineers (Spinning related) Part-2

 

30.   What is fibre elongation?

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

31.   What is bale management?

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

32.   When bale mixing is done?

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

33.   What is carding?

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

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

       Ans. True.

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

       Ans. Yes.

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

       Ans. Yes.

37.   What is the name of combing waste?

       Ans. Noils.

38.   What is the meaning of TPI?

       Ans. Turns per Inch/Twist per inch

39.   What is the ring frame wastage?

       Ans. Pnewmafil, banda, sweep, hard waste.

40.   What is roving?

       Ans. A roving is a continuous slightly twisted strand of fibres which has not received its final drawing for yarn.

41.   Over twisted yarn become poor in strength (yes/ no).

       Ans.Yes

42.   What is the meaning of MIC?

       Ans. Microgram per inch.

43.   In direct system which one is fixed (mass/length)?

       Ans. Mass

44.   In indirect system which one is fixed (mass/length)?

       Ans. Length

45.   English count is denoted by Ne (yas/no)?

       Ans. Yes.

46.   Metric count is denoted by Nm(yes/no)?

       Ans. Yes

47.   Sliver and roving count is expressed by hank(yes/no)?

       Ans. Yes

48.   In spinning mill, up to roving the count value is expressed by hank then count (true/false)?

       Ans. True

49.   The shape of yarn become round due to twist (yas/no)?

       Ans. Yas

50.   How can you express fiber fineness?

       Ans. Weight per unit length.

51.   What is tensile strength?

       Ans. Tensile strength = force required to break the specimen/ cross sectional area

52.   What is yield point?

       Ans. The point up to which, a material contains its elasticity is called yield point.

53.   More fibre drawing produces more short fiber & resulted weak yarn (yes/no).

       Ans. Yes

54.   What is twist?

       Ans. Twist is the spirality of bundle of fibres/ filaments.

55.   Write down the types of yarn twist.

       Ans.“Z” Twist & “S” twist.

56.   Twist increases the strength of yarn (true/ false).

       Ans. True

57.   What is strain?

       Ans. Strain = elongation / initial length

58.   What is the unit of Strain?

       Ans. No unit.

59.   What is the meaning of CSP?

       Ans. Count Strength Product    CSP= Count × Strength