12:15 Oct 30, 2017 |
English language (monolingual) [PRO] Tech/Engineering - Mechanics / Mech Engineering | |||||||
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| Selected response from: Tony M France Local time: 14:25 | ||||||
Grading comment
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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4 +4 | Probably no difference |
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Probably no difference Explanation: I'd say there is almost certainly no difference at all; I'd expect to find the former expression perhaps at the first occurrence in the document, and the latter expression everywhere else thereafter. In this particular instance, it is just possible that a technical difference MIGHT be expressed in this way, though I feel it is unlikely. In any event, this terminology would be to be deprecated, as it remains ambiguous! In point of fact, some locomotives are simply directly driven by a diesel engine; others may have a diesel engine that drives and electric generator, and the actual traction motors are electric. The latter would normally be referred to as 'diesel-electric' — and indeed, I don't know if they are still in current use. But if this were to be the case, then it would by no means be clear which of the 2 expressions was intended to refer to which case! |
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