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

Question
The first practical steam-powered water pump, known as the 'Miner's Friend', was invented by whom in 1698?
A. Thomas Newcomen
B. Richard Trevithick
C. Thomas Savery
D. James Watt
Answer: Option C
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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Question #1
Who invented the first practical electronic pocket calculator, introduced commercially in 1970?
A. Alan Turing
B. Charles Babbage
C. Douglas Engelbart
D. Sanyo and Texas Instruments teams
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Correct Answer: Option D

Explanation:
Sanyo's ICC-0081 and Texas Instruments' 'Cal-Tech' project initiated the mass scaling of hand-held microelectronic computation.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered that blood can be categorized into various Rh factors (positive and negative)?
A. Edward Jenner
B. Karl Landsteiner and Alexander Wiener
C. Robert Koch
D. William Harvey
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Correct Answer: Option B

Explanation:
Karl Landsteiner and Alexander S. Wiener discovered the Rhesus (Rh) factor in blood in 1937.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the common chemical matchstick containing safer amorphous red phosphorus instead of toxic white phosphorus is called what?
A. Safety Match
B. Lucifer Match
C. Friction Match
D. Congreve Match
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Correct Answer: Option A

Explanation:
John Edvard Lundström developed the commercial safety match in Sweden by putting red phosphorus on the striking strip rather than the match head.
This question belongs to: Static General Knowledge Inventions and Discoveries
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