The invention of the common mechanical device known as the industrial centrifugal cream separator was patented by whom? MCQ with Answer and Explanation

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The invention of the common mechanical device known as the industrial centrifugal cream separator was patented by whom?

A. Gustaf de Laval

B. James Watt

C. Eli Whitney

D. Cyrus McCormick

Answer: Option A

Solution (By JKSSB Mock Tests)

De Laval patented the high-speed continuous centrifugal cream separator in 1878, streamlining commercial dairy production.

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 automotive safety equipment known as the three-point seatbelt was patented by whom?

A. Garrett Morgan

B. Henry Ford

C. Nils Bohlin for Volvo

D. Karl Benz

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Correct Answer: Option C

Explanation:
Swedish engineer Nils Bohlin developed the modern cross-lap safety harness configuration in 1959, saving countless lives across traffic boundaries.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered that light travels in packets of discrete energy called photons, explaining the Photoelectric Effect?

A. Albert Einstein

B. Niels Bohr

C. Max Planck

D. Louis de Broglie

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Correct Answer: Option A

Explanation:
Albert Einstein won the 1921 Nobel Prize in Physics for his 1905 paper applying quantum concepts to the photoelectric effect.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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The invention of the common mechanical transport mechanism known as the bicycle chain drive system was optimized by whom?

A. Karl Benz

B. Harry John Lawson and John Kemp Starley

C. Wright Brothers

D. Henry Ford

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Correct Answer: Option B

Explanation:
Starley engineered the 'Rover Safety Bicycle' in 1885, featuring equal-sized wheels and rear-wheel chain driving mechanisms.

This question belongs to: Static General Knowledge Inventions and Discoveries

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