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Inventions Placement Tests: Certification Test 486

Fluorescent Lighting MCQs App Download & PDF e-Book - 486

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MCQ: 486

Mercury vapor lamp was invented by an American Electrical engineer named as

  1. Sir James Hillier
  2. Sir Peter Cooper Hewitt
  3. Uno Vilho
  4. Dr Dennis Colonello
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Fluorescent Lighting Placement Tests: Inventions App & eBook MCQs

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8th Class Science Test Questions

8th Class Science Quiz with Answers