The invention of the first practical steam engine locomotive deployed on standard industrial rail layouts was done by whom? MCQ with Answer and Explanation

Question

The invention of the first practical steam engine locomotive deployed on standard industrial rail layouts was done by whom?

A. James Watt

B. Richard Trevithick

C. Thomas Newcomen

D. George Stephenson

Answer: Option B

Solution (By JKSSB Mock Tests)

Trevithick designed the first functional railway steam locomotive in 1804 for the Penydarren ironworks track.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the first recognized hormonal messenger molecule in the human body, Secretin?

A. Frederick Banting

B. William Bayliss and Ernest Starling

C. Karl Landsteiner

D. Charles Best

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Correct Answer: Option B

Explanation:
Bayliss and Starling isolated secretin in 1902, discovering chemical signaling loops that function independently of direct nervous inputs.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered that the chemical element Cadmium is isolated as an impurity inside zinc carbonate mineral ores?

A. Jöns Jacob Berzelius

B. Martin Heinrich Klaproth

C. Friedrich Stromeyer

D. Carl Wilhelm Scheele

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Correct Answer: Option C

Explanation:
Stromeyer discovered cadmium in 1817 while inspecting pharmaceutical zinc oxide samples in Germany.

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Question #3

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The first electronic programmable digital computer, ENIAC, was designed by whom?

A. Charles Babbage

B. Alan Turing

C. John Mauchly and J. Presper Eckert

D. John von Neumann

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Correct Answer: Option C

Explanation:
ENIAC (Electronic Numerical Integrator and Computer) was constructed by Mauchly and Eckert at the University of Pennsylvania in 1945.

This question belongs to: Static General Knowledge Inventions and Discoveries

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