m - HKU Libraries
m - HKU Libraries
m - HKU Libraries
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III. Skill Standard:<br />
"A" Grade Standard<br />
(a) Piecing 4 adjacent broken slivers<br />
in 12 seconds.<br />
(b) Doffing 1 full lap and re-starting<br />
in 14 seconds.<br />
"B" Grade Standard<br />
(a) Piecing 4 adjacent broken slivers<br />
in 16 seconds.<br />
(b) Doffing 1 full lap and re-starting<br />
in 17 seconds.<br />
"C" Grade Standard<br />
(a) Piecing 4 adjacent broken slivers<br />
in 20 seconds.<br />
(b) Doffing 1 full lap and re-starting<br />
in 20 seconds.<br />
The above standards are based on<br />
16 ends of 10" diameter can being<br />
used.<br />
IV. Trade Tests:<br />
1. Piece sliver breaks, doff full laps<br />
and re-start skilfully within a<br />
certain time as specified in the<br />
Skill Standard.<br />
2. Clean a sliver-Iap-machine frame<br />
efficiently within a reasonable<br />
time.<br />
3. Answer questions satisfactorily<br />
on:<br />
(a)<br />
(b)<br />
The purpose of producing<br />
sliver-laps.<br />
The dangerous parts and<br />
safety devices on a sliverlap-machine.<br />
(c) The names of the main parts<br />
of a sliver-Iap-machine.<br />
(d) The effects of imperfect<br />
cleaning work on quality and<br />
machinery.<br />
(e) The effects on quality of<br />
faulty automatic machine<br />
stopping device.<br />
(/) The effects on quality of<br />
incorrect sliver piecings or<br />
not making the piecing.<br />
(g)<br />
The effects on quality of the<br />
pressure of top rollers not<br />
being even or the top rollers<br />
not rotating freely.<br />
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