The invention of the common mechanical transport mechanism known as the bicycle chain drive system was optimized by whom? MCQ with Answer and Explanation

Question

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

A. Wright Brothers

B. Karl Benz

C. Harry John Lawson and John Kemp Starley

D. Henry Ford

Answer: Option C

Solution (By JKSSB Mock Tests)

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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Who invented the first commercially practical incandescent light bulb in 1879?

A. Humphry Davy

B. Nikola Tesla

C. Thomas Edison

D. Joseph Swan

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Correct Answer: Option C

Explanation:
Thomas Alva Edison developed a fully practical carbon-filament incandescent lamp and public power utility system.

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Question #2

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The blood group system (A, B, O) was discovered by which scientist?

A. Robert Koch

B. Karl Landsteiner

C. William Harvey

D. Edward Jenner

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Correct Answer: Option B

Explanation:
Karl Landsteiner discovered the ABO blood groups in 1900, for which he received the Nobel Prize in Physiology or Medicine in 1930.

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Question #3

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The invention of the first practical household mechanical washing machine is attributed to which developer?

A. Alva J. Fisher

B. Walter Hunt

C. Thomas Edison

D. Elisha Otis

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Correct Answer: Option A

Explanation:
Alva J. Fisher is credited with inventing the electric-motor-driven 'Thor' washing machine, introduced by the Hurley Machine Company in 1908.

This question belongs to: Static General Knowledge Inventions and Discoveries

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