The invention of the diesel engine is named after which German mechanical engineer? MCQ with Answer and Explanation

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The invention of the diesel engine is named after which German mechanical engineer?

A. Gottlieb Daimler

B. Karl Benz

C. Nikolaus Otto

D. Rudolf Diesel

Answer: Option D

Solution (By JKSSB Mock Tests)

Rudolf Diesel designed a high-efficiency compression-ignition internal combustion engine, patented in 1893.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that elements display unique crystalline patterns when rapidly frozen from molten metal matrices, founding physical Metallurgy?

A. Dmitri Mendeleev

B. Henry Clifton Sorby

C. Henry Bessemer

D. Antoine Lavoisier

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Correct Answer: Option B

Explanation:
Sorby applied microscopic analysis to polished iron and steel samples, establishing microstructure phase boundaries.

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Question #2

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The invention of the common electronic memory system known as Dynamic Random-Access Memory (DRAM) was patented by whom?

A. Robert Noyce

B. Jack Kilby

C. Fujio Masuoka

D. Robert H. Dennard

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Correct Answer: Option D

Explanation:
Dennard patented the single-transistor, single-capacitor memory cell layout at IBM in 1968, allowing exceptionally high-density memory storage.

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Question #3

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The first practical automatic dishwasher was invented and patented by which female innovator in 1886?

A. Josephine Cochrane

B. Stephanie Kwolek

C. Mary Anderson

D. Grace Hopper

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Correct Answer: Option A

Explanation:
Josephine Cochrane designed the first successful hand-powered mechanical dishwasher because she wanted to protect her fine china from chipping.

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