Inventions Practice Tests
Inventions Online Tests
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The MCQ: Mercury vapor lamp was invented by an American Electrical engineer named as; "Fluorescent Lighting" App Download (Free) with answers: Sir James Hillier; Sir Peter Cooper Hewitt; Uno Vilho; Dr Dennis Colonello; for online elementary school classes. Solve Inventions and Inventors Quiz Questions, download Google eBook (Free Sample) for school certificate.
In which one of the following year, mercury vapor lamp was invented?
Mercury vapor lamp was invented by an American Electrical engineer named as
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