The invention of the modern mechanical reaper, which automated grain harvesting, was patented by whom? MCQ with Answer and Explanation

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The invention of the modern mechanical reaper, which automated grain harvesting, was patented by whom?

A. Eli Whitney

B. James Hargreaves

C. Cyrus McCormick

D. John Deere

Answer: Option C

Solution (By JKSSB Mock Tests)

Cyrus McCormick patented the horse-drawn mechanical reaper in 1834, transforming agricultural output.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The invention of the common computing programming language Fortran (Formula Translation) was directed by whom at IBM?

A. Dennis Ritchie

B. John Backus

C. Alan Turing

D. Grace Hopper

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Correct Answer: Option B

Explanation:
John Backus led the engineering team that developed Fortran in 1957, the first widely used high-level compiled computer language.

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Question #2

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Who discovered the presence of the complex radioactive element Plutonium in 1940?

A. Otto Hahn

B. Enrico Fermi

C. Lise Meitner

D. Glenn T. Seaborg and his team

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Correct Answer: Option D

Explanation:
Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl isolated plutonium-238 via deuteron bombardment of uranium.

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Question #3

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Who is credited with inventing the modern ballpoint pen in 1938?

A. László Bíró

B. John Loud

C. Lewis Waterman

D. Rowland Hill

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Correct Answer: Option A

Explanation:
Hungarian journalist László Bíró invented the first commercially successful ballpoint pen, which bears his name ('Biro') in many countries.

This question belongs to: Static General Knowledge Inventions and Discoveries

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