The invention of the common mechanical office typewriter spool ribbon reversal mechanism was patented by whom? MCQ with Answer and Explanation

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The invention of the common mechanical office typewriter spool ribbon reversal mechanism was patented by whom?

A. Christopher Sholes

B. Walter Hunt

C. John Pratt and Franz Xaver Wagner

D. John Loud

Answer: Option C

Solution (By JKSSB Mock Tests)

Wagner patented the front-strike visibility layout and automated ribbon reversing wheels, which Underwood manufactured.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the law of hereditary transmission through experiments on pea plants?

A. Gregor Mendel

B. Jean-Baptiste Lamarck

C. Thomas Hunt Morgan

D. Charles Darwin

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Correct Answer: Option A

Explanation:
Gregor Mendel is known as the father of modern genetics for his discovery of the basic laws of heredity through breeding pea plants.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the process of nuclear fission in heavy elements, winning the Nobel Prize in Chemistry in 1944?

A. Enrico Fermi

B. Lise Meitner

C. Niels Bohr

D. Otto Hahn

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Correct Answer: Option D

Explanation:
German chemist Otto Hahn discovered nuclear fission of uranium in 1938 alongside Fritz Strassmann.

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Question #3

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Who discovered that light travels slower in dense mediums like water or glass than in a vacuum, confirming the wave theory?

A. Albert Michelson

B. Léon Foucault

C. Isaac Newton

D. Ole Rømer

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Correct Answer: Option B

Explanation:
Léon Foucault measured the speed of light in water using a rotating mirror device, refuting Newton's corpuscular particle model.

This question belongs to: Static General Knowledge Inventions and Discoveries

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