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Chenyincheng Posted 13 years ago
Grammar

Preposition

Hi

Could someone please tell me what would be the right word to go into the blank in the sentence below?

This product has been tested ___ 220V.
1) on
2) at
3) with
4) using
5) none of the above (please suggest other options)

Thanks a lot!
  

Top answer

at

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4 Answers
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Hi, Mister Micawber. Thank you for answering my question. I know that, very often, there is simply no rule that says when to use which preposition. But is there a rule / an explanation behind this one?

Also, how can I use the above sentence structure to say "When I tested the product, I used a ballast that has a rated voltage of 240V. But the supply voltage was 216V. Is it correct to say:
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chenyincheng But is there a rule / an explanation behind this one?
I see none, really; it is just one of the many uses of 'at'. Equipment is tested for performance at various voltages; things are tested at various levels.

I tested the product at 216V with a 240V ballast.
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