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Inventions

Inventions
Who invented Bifocal Lens?

Rudolf Diesel
Benjamin Franklin
Alfred B. Nobel
Thomas Alva Edison

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Inventions
In which decade were the first successful diode and triode vacuum tubes invented?

1800s
1900s
1880s
1890s

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Inventions
When was the first lawn mower invented?

1854
1830
1835
1849

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Inventions
Who invented Dynamite?

Benjamin Franklin
Thomas Alva Edison
Sir Alexander Graham Bell
Alfred B. Nobel

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Inventions
Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?

Banjo
Clarinet
Oboe
Harmonium

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Inventions
For what does the world owe Almon Strowger a debt of gratitude?

Parking Meters
Traffic Lights
Vending Machines
Automatic Telephone Exchanges

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MORE MCQ ON Inventions

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