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. Cyrus McCormick

B. Eli Whitney

C. James Hargreaves

D. John Deere

Answer: Option A

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 operating system layout known as Unix was co-developed by whom?

A. Steve Jobs

B. Bill Gates

C. Linus Torvalds

D. Ken Thompson and Dennis Ritchie

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Correct Answer: Option D

Explanation:
Thompson and Ritchie engineered Unix at Bell Labs in 1969, establishing foundational standards for multitasking operating systems.

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Question #2

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The discovery of the electrical conductivity properties of semi-conductive materials under specific doping was pioneered by whom?

A. Thomas Edison

B. Nikola Tesla

C. Michael Faraday

D. John Bardeen, Walter Brattain, and William Shockley

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Correct Answer: Option D

Explanation:
These three physicists invented the point-contact solid-state transistor at Bell Labs in 1947, replacing vacuum tubes.

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Question #3

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The invention of the common mechanical office stapler mechanism was popularized by which manufacturing developer?

A. John Loud

B. George McGill and the Boston Wire Stitcher Company

C. Christopher Sholes

D. Walter Hunt

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Correct Answer: Option B

Explanation:
McGill patented functional malleable brass paper fasteners, and industrial developers later automated magazine tracking feeds.

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