GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/47

Question 47 (Textile Engineering & Fibre Science)

A core spun yarn of 30 tex is to be produced with 10% core by weight. If cotton roving count is 540 tex, the required draft on the ringframe will be __20__.

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Core spun yarn tex=30 tex

Core % by weight=10%

Cotton roving count=540 tex


Cotton yarn tex=Core yarn tex(1-core% by weight/100)



=30 x 0.9

Cotton yarn tex=27.0


Draft=Feed count/Delivery count


Draft=20 (Answer)

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