m - HKU Libraries
m - HKU Libraries
m - HKU Libraries
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(b) The dangerous parts and (b) <<br />
safety devices on a speed<br />
frame.<br />
(c) The names of the main parts<br />
of a speed frame.<br />
(d) The effect of imperfect (d)<br />
cleaning work on quality and ite^F&i^Bln} °<br />
machinery.<br />
(e) Why hard-twisted piecings (*) EftSiBffi3Bffi»lliatffl °<br />
are not allowed.<br />
(/) The difficulties arising in the (/) Sfa^ffiUSffififtfr» F&8SR<br />
spinning section when spinning<br />
yarns from two-fold,<br />
single or badly-pieced rovings.<br />
(g) The possible causes of ir- (g)<br />
regular rovings.<br />
(h) What action is to be taken (//)<br />
with faulty slivers.<br />
(z) The detrimental effect on (/)<br />
quality of allowing different<br />
counts of slivers to become<br />
mixed.<br />
(;) Types of faults which may 0)<br />
arise from machine malfunctions,<br />
such as: ridgy bobbins,<br />
bobbins with unequal taper,<br />
soft bobbins, cut roving,<br />
stretched roving and sloughing,<br />
and the action to be<br />
taken when such faults are<br />
observed.<br />
72
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