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Inventions MCQs – Certification Test 486

Fluorescent Lighting MCQs (Question 486) – Study App & e-Book Download

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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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8th Class Science Test Questions

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