GATE 2017-2018 :: GATE Textile and Fibre
- A square plain jammed woven fabric of 0.5 mm thickness is to be produced from polyester yarns. Assuming circular yarn cross-section, the number of picks per cm in the fabric on the loom is approximately
- On a winding machine, if the winding speed is increased from 1000 m/min to 1200 m/min, the percentage increase in the yarn tension will be approximately
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Choose the correct alternative from amongst A, B, C and D Mercerization of cotton results inP Increase in tensile strengthQ Increase in dye uptakeR Modification of crystal structureS Decrease in moisture regain
- In the case of reactive dyeing of cotton, the exhaustion is 70% and reaction efficiency is 80%. Assuming that the initial dye concentration is 2% on the weight of fabric, the amount of unreacted dye on the fabric expressed as a percentage of fabric weight would be
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Consider the following assertion [a] and reason [r] and choose the most appropriate answer [a] Controlled reduction treatments are commercially used for shrink resist finishing of wool[r] Reduction disrupts the disulphide bonds, which are responsible for wool shrinkage
- The principle which cannot be used to measure hairiness of yarn is
- The abrasion cycles on a flat abrasion tester increase with an increase in
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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
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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
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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
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