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Q. The ratio of yarn tensile modulus to fibre tensile modulus, where the surface fibres are inclined at a twist angle of 25°, (rounded off to 2 decimal places) is Ans: 0.81-0.83

Q. Six carded slivers of 4 ktex each are drawn to produce a sliver of 5 ktex. The draft required (rounded off to 1 decimal place) is         . Ans: 4.7-4.9

Q. Molecular weight of the repeat unit of poly (ethylene terephthalate) is Ans: 192.0-192.5

Q. A blend of nylon 6 and polyester fibres when dissolved in formic acid at room temperature leaves a bone dry residue of 40% by weight. The weight fraction of polyester in the blend (rounded off to 1 decimal place) is   . Ans: 0.4-0.4

Q. The gum present in the raw mulberry silk fibre is                                               (A) Sericin         (B) Fibroin                 (C) Keratin                (D) Casein Ans: Sericin Sol: The outer layer of silk filament is a form of gum, or silk glue, called sericin. ...

Q. Barium Activity Number (BAN) of a cotton fabric was found to be 150. The fabric must have undergone (A) Desizing only (B) Desizing and scouring only  (C) Desizing and bleaching only (D) Desizing, scouring and mercerization Ans: Desizing, scouring and mercerization

Q. Work factor of a perfectly elastic yarn is                                                        (A) 0               (B) ...

Q. Among the following options, the thickest Classimat fault is             (A) B3             (B) D1                       (C) G                        (D) H2 Ans: B3

Q. The movements of guide bars in warp knitting are (A) Swinging and shaking  (B) Shaking and shogging (C) Shogging and twisting (D) Swinging and shogging Ans: Swinging and shogging

Q. In a modern card, the highest angular velocity (rpm) is found in             (A) Feed roller        (B) Taker-in             (C) Cylinder              (D) Doffer Ans: Taker-in