# GATE (TF) Textile 2006 Question Paper Solution | GATE/2006/TF/65

###### Question 65 (Textile Engineering & Fibre Science)

If the mass of fibre presented to the doffer per revolution of cylinder is 3.3gm, the transfer coefficient of the carding machine will be approximately

Carding machine efficiency=90%

Surface speed of cylinder=1600 m/min

Doffer surface speed=40 m/min

Production rate=10.8 kg/h

=10.8 x 1000/60 g/min

=180 g/min

Mass of fibre presented to the doffer per revolution of cylinder=3.3 gm

The transfer coefficient of the carding machine=?

Surface speed of the cylinder=1600 m/min      Cylinder revolution speed(N)=404 rpm

Cylinder mass transfer per revolution=Mass of fibre presented to the doffer per revolution of cylinder x Cylinder revolution speed(N)

Cylinder mass transfer per revolution=3.3 gm x 404 rpm

Cylinder mass transfer per revolution=1212 g/min

Transfer coefficient=Production rate/Cylinder mass transfer per revolution

Transfer coefficient=180/1212

Transfer coefficient=0.14 (Ans)