Who is credited with the invention of the submarine 'Turtle', used in military action? MCQ with Answer and Explanation

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Who is credited with the invention of the submarine 'Turtle', used in military action?

A. Robert Fulton

B. David Bushnell

C. John Philip Holland

D. Cornelis Drebbel

Answer: Option B

Solution (By JKSSB Mock Tests)

David Bushnell invented the Turtle in 1775, the first submarine ever used in combat.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that certain elements change identities through radioactive transmutation, establishing the laws of radioactive decay?

A. Marie Curie

B. Otto Hahn

C. Henri Becquerel

D. Ernest Rutherford and Frederick Soddy

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Correct Answer: Option D

Explanation:
Rutherford and Soddy formulated the decay transformation principles, proving elements naturally break down into different elements.

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Question #2

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The invention of the common mechanical office typewriter correction fluid ('Liquid Paper') was developed by which female innovator?

A. Josephine Cochrane

B. Mary Anderson

C. Bette Nesmith Graham

D. Grace Hopper

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Correct Answer: Option C

Explanation:
Graham mixed white tempera paint in a blender in the 1950s to fix her typing errors, later scaling the multi-million-dollar Liquid Paper company.

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Question #3

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The invention of the common medical diagnostic device known as the blood pressure cuff (Sphygmomanometer) was optimized by whom?

A. Scipione Riva-Rocci and Harvey Cushing

B. Joseph Lister

C. René Laennec

D. Willem Einthoven

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Correct Answer: Option A

Explanation:
Riva-Rocci introduced the mercury arm-cuff design in 1896, and neurosurgeon Harvey Cushing popularized it globally.

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