The invention of the common mechanical steel plow configuration that allowed farming in tough prairie soil was engineered by whom? MCQ with Answer and Explanation

Question

The invention of the common mechanical steel plow configuration that allowed farming in tough prairie soil was engineered by whom?

A. John Deere

B. Walter Hunt

C. Eli Whitney

D. Cyrus McCormick

Answer: Option A

Solution (By JKSSB Mock Tests)

Blacksmith John Deere designed a highly polished self-scouring steel plow share blade in 1837.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the common mechanical device known as the modern coin-operated parking meter was patented by whom?

A. James Ritty

B. Walter Hunt

C. Garrett Morgan

D. Carl Magee

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Correct Answer: Option D

Explanation:
Carl Magee patented the 'Park-O-Meter' in Oklahoma City in 1935 to regulate downtown vehicle traffic turnover.

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Question #2

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The invention of the common mechanical cash register to prevent employee theft was patented by whom in 1879?

A. James Ritty

B. Christopher Sholes

C. Walter Hunt

D. Elisha Otis

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Correct Answer: Option A

Explanation:
Saloon owner James Ritty designed 'Ritty's Incorruptible Cashier' after observing the revolutions of a ship's propeller tracker.

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Question #3

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The invention of the first functional high-vacuum electron tube amplifier, the Audion triode, was made by whom?

A. John Ambrose Fleming

B. Nikola Tesla

C. Lee de Forest

D. Thomas Edison

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Correct Answer: Option C

Explanation:
Lee de Forest added a grid control wire element to Fleming's diode in 1906, creating the first signal amplification tube.

This question belongs to: Static General Knowledge Inventions and Discoveries

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