SOME NUMERICAL QUESTIONS OF YARN SPINNING PROCESS:
Q. No. - 1
An opening roller in the blow room with 100 cms. length 38 cms. diameter and 2 teeth per square cm. is rotating with an angular velocity of 400 rpm to deliver fiber tufts at a production rate of 500 kgs per hour. Calculate the intensity of opening(fiber mass in mg per tooth) of the opening roller approximately?
Opening roller diameter - 38 cms.
Opening roller length. - 100 cms.
Tooth density - 2 teeth/ square cm.
Opening roller rpm. - 400
Production rate. - 500 kgs/ hrs
The intensity of fiber opening -?
Q. No. - 2 The surface speed of the coiler calender roller is 39.1 meters/ minute. If the linear density of sliver is 4-kilo tex. Calculate the production per shift of 8 hours in kgs. at 80 % efficiency?
Q. No. - 3
The lap weight of 14 Ozs per yard is fed into the carding machine, and the mechanical draft is 100. If total carding waste is 5 %. Calculate the weight of a 6-yard sliver in Ozs?
Q.No. - 4
A scutcher having 11 inches diameter is rotating at 10 rpm. If efficiency is 80 % and lap hank is 0.0012. calculate the machine production in kgs per shift?
Q. No. - 5
The mechanical draft in carding is 102. Carding waste % is 5.0 and sliver weight per yard is 54 grains. Calculate the lap hank to be feed in carding?
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