Question 64 (Textile Engineering & Fibre Science)
A carding machine, working at 90%A efficiency, has cylinder radium 0.63m, cylinder surface speed 1600 m/min, doffer surface speed 40m/min and production rate 10.8 kg/h. Assuming that there is no draft between doffer and delivery roller, the linear density (ktex) of card sliver will be approximately
| (A) | 5 |
| (B) | 4 |
| (C) | 3 |
| (D) | 2 |
[Show Answer]
Option A is correct.
Given-
Carding machine efficiency=90%
Cylinder radius=0.63m
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
Linear density of card sliver(ktex)=?
Linear density of card sliver(ktex)=Production rate/Doffer surface speed
Linear density of card sliver(ktex)=180/40
Linear density of card sliver(ktex)=4.5
=5 (Ans)