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Discoveries and inventions Practice Questions & Answers

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Who Invented Dishwasher?

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Who Invented Dishwasher?
1). Vint Cerf
2). David Chaum
3). Georges Claude
4). Josephine Cochrane

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Who Invented Lawnmower?

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Who Invented Lawnmower?
1). Edwin Howard Armstrong
2). John Barber
3). Edwin Beard Budding
4). Nicholas Callan

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Who Invented Laser?

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Who Invented Laser?
1). William Friese-Greene
2). Arthur Fry
3). Gordon Gould
4). Otto von Guericke

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Who discovered Fullerene (an allotrope of carbon)?

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Who discovered Fullerene (an allotrope of carbon)?
1). K Scheele
2). Richard Smalley
3). Faraday
4). Heisenberg

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Who Invented postage stamp?

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Who Invented postage stamp?
1). Ruth Handler
2). John Harington
3). Rowland Hill
4). Felix Hoffmann