Question 61. Fabric abrasion resistance cannot be assessed by the loss in

Question 62. Ratio of grab strength to strip strength is the highest when fabric extension (%) is

Question 63. The principle which cannot be used to measure hairiness of yarn is

Question 64. A winding machine without anti-patterning device has the following particulars:Cylindrical winding drum diameter : 75 mmNumber of crossing on drum           : 2 1/2Rotational speed of the drum          : 2860 rev/minTraverse length                                   : 150 mmA 3.5 degree constant taper cone is built on the above cone winder with no movement of the point of drive during the package build up. At mean cone diameter of 150 mm the package rev/min is 1375.The number of times major patterning will occur in producing 200 mm mean diameter package on 40 mm mean diameter core is

Question 65. The abrasion cycles on a flat abrasion tester increase with an increase in

Question 66. Consider the following particulars for a spinning line producing 30 tex yarn from 150 militex polyester fibre.Mass CV of card sliver                           : 3%Mass CV added at draw-frame            : 2%Mass CV added at speed-frame          : 3%Mass CV added at ring-frame              : 7%Number of doubling at draw-frame   : 6Number of draw-frame passage         : 1The mass CV% of roving is approximately

Question 67. A winding machine without anti-patterning device has the following particulars:Cylindrical winding drum diameter : 75 mmNumber of crossing on drum           : 2 1/2Rotational speed of the drum          : 2860 rev/minTraverse length                                   : 150 mmA 3.5 degree constant taper cone is built on the above cone winder with no movement of the point of drive during the package build up. At mean cone diameter of 150 mm the package rev/min is 1375.Distance in mm of point of drive from the base of the cone along the traverse is approximately

Question 68. Consider the following particulars for a spinning line producing 30 tex yarn from 150 militex polyester fibre.Mass CV of card sliver                           : 3%Mass CV added at draw-frame            : 2%Mass CV added at speed-frame          : 3%Mass CV added at ring-frame              : 7%Number of doubling at draw-frame   : 6Number of draw-frame passage         : 1Index of irregularity of yarn is approximately

Question 69. The angle subtended by the half-lap on the cylinder comb is 90o. The time taken by the half-lap to comb a fringe is 0.04 s.From the following data, calculate approximate production rate in kg/hrLength of lap fed per nip   : 6 mmLap linear density               : 60 ktexNoil                                       : 20%Efficiency                             : 80%Number of heads              : 6

Question 70. The angle subtended by the half-lap on the cylinder comb is 90o. The time taken by the half-lap to comb a fringe is 0.04 s.The speed of the comber in nips/min is