Question

Two polyester and six viscose rayon slivers of same count are blended on a drawframe. In the
second passage, four slivers from first passage are further blended with two combed cotton slivers
of the same count. The viscose (%) in the final sliver to the nearest integer is ___________
Q.36 In ring spinning, the tension in yarn is the maximum
(A) Between the lappet guide and front roller
(B) Where the balloon radius is the maximum
(C) In winding zone
(D) Just below the lappet guide

Answer 1

B Where the balloon radius is the maximum

Answer 2

The correct answer for the first part : The viscose percentage in the final silver to the nearest integer is 50%.

For second part, the correct answer is option (B) where the balloon radius is maximum.

In ring spinning, tensions develop due to work that is done against the frictional forces of the ring and the traveler on the yarn.

The tensions develop in three zones -

1) in the yarn formation zone

2) in winding zone

3) in the balloon zone, which is the zone between the traveler and the lappet guide.

Here the yarn tension changes noticeably and is maximum where the balloon radius is maximum.