m - HKU Libraries
m - HKU Libraries
m - HKU Libraries
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III. Skill Standard:<br />
"A" Grade Standard<br />
(a) Change 1 lap in 7 seconds.<br />
(b) Doff 1 full lap and re-start in<br />
14 seconds.<br />
"B" Grade Standard<br />
(a) Change 1 lap in 8 seconds.<br />
(b) Doff 1 full lap and re-start in<br />
17 seconds.<br />
4< C" Grade Standard<br />
(a) Change 1 lap in 10 seconds.<br />
(b) Doff 1 full lap and re-start in<br />
20 seconds.<br />
IV. Trade Tests:<br />
1. Change feed laps, doff full laps<br />
and re-start within a certain time<br />
as specified in the Skill Standard.<br />
2. All piecings made should be clean<br />
and good.<br />
3. Clean a ribbon-lap-machine<br />
efficiently within a reasonable<br />
time.<br />
4. Answer questions satisfactorily<br />
on:<br />
(a) The purpose of producing<br />
ribbon-laps.<br />
(b) The dangerous parts and<br />
safety devices on the ribbonlap-machine.<br />
(c)<br />
The names of the main parts<br />
of a ribbon-lap-machine.<br />
(d) The effects of imperfect<br />
cleaning work on quality and<br />
machinery.<br />
(e) The effects on quality of a<br />
faulty automatic machine<br />
stopping device.<br />
(/) The effects of lap-licking on<br />
quality.<br />
(g)<br />
The effects on quality, if the<br />
pressure of top rollers is not<br />
even or the top rollers are<br />
not rolling freely.
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