The first practical steam-powered water pump, known as the 'Miner's Friend', was invented by whom in 1698? MCQ with Answer and Explanation

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The first practical steam-powered water pump, known as the 'Miner's Friend', was invented by whom in 1698?

A. Richard Trevithick

B. Thomas Savery

C. James Watt

D. Thomas Newcomen

Answer: Option B

Solution (By JKSSB Mock Tests)

Thomas Savery patented the first commercial steam-driven machine to pump water out of flooded mines.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the physical phenomenon of electromagnetic radio waves traveling through the air, verifying Maxwell's equations?

A. Heinrich Hertz

B. Michael Faraday

C. Guglielmo Marconi

D. Nikola Tesla

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Correct Answer: Option A

Explanation:
Heinrich Hertz built spark-gap transmitter devices in 1887 to physically prove radio waves transmit energy through empty space.

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Who discovered the exact structural formula of the complex molecule Vitamin B12, using advanced X-ray crystallography?

A. Marie Curie

B. Rosalind Franklin

C. Dorothy Hodgkin

D. Barbara McClintock

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Correct Answer: Option C

Explanation:
Dorothy Hodgkin determined the atomic structures of penicillin, vitamin B12, and insulin, winning the 1964 Nobel Prize in Chemistry.

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The fundamental principle of fluid mechanics stating that internal pressure drops as fluid velocity increases was discovered by whom?

A. Blaise Pascal

B. Daniel Bernoulli

C. Archimedes

D. Isaac Newton

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Correct Answer: Option B

Explanation:
Daniel Bernoulli published Bernoulli's Principle in his book 'Hydrodynamica' in 1738.

This question belongs to: Static General Knowledge Inventions and Discoveries

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