14:02 Nov 12, 2005 |
English language (monolingual) [PRO] Tech/Engineering - Electronics / Elect Eng / printing | |||||||
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| Selected response from: Ken Cox Local time: 14:07 | ||||||
Grading comment
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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3 +4 | series of guard devices / events |
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series of guard devices / events Explanation: IMO 'chain' should be understood figuratively as a series of items or events (like a 'safety chain', which is a set of contacts etc. connected in series so the equipment is disabled if any one (or more) of the contacts is open) - analogous to a chain, which breaks if any link breaks. |
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Grading comment
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