GATE (TF) Textile 2016 Question Paper Solution | GATE/2016/TF/39

Question 39 (Textile Engineering & Fibre Science)

The final yarn count required from a ring frame is 36s Ne with 28 TPI. The twist contraction during spinning is 3%. If the feed roving count is 2s Ne, the mechanical draft required in the ring frame will be __18.40 : 18.65__.

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Given in the question–

The yarn count=36^s Ne

TPI=28

Twist contraction=3%

Feed roving count=2^s Ne

Mechanical draft=?

Let, initial yarn count =X

Then,
X(1-(3%/100))=36

X(1-0.03)=36

X(0.97)=36

X=36/0.97

Delivery count(X)=37.11

Formula:

Mechanical draft=Delivery count /Feed count

=37.11/2

Mechanical draft=18.55 (Answer)

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