GATE (TF) Textile 2003 Question Paper Solution | GATE/2003/TF/56

If the ration of winding-on diameter to ring diameter is 0.86, what is the angle of yarn pull ?

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Option B is correct.
Ratio of winding on diameter to ring diameter=0.86

Let, angle of yarn pull= $\theta$

By formula-

$Sin \theta=\frac{Bobbin dia}{Ring dia}$

$Sin \theta=0.86$

$\theta=Sin^-1 (0.86)$

$\theta=59.31$

$\theta=59.31^o$