The invention of the common mechanical elevator safety brake system was publicly demonstrated at the World's Fair by whom? MCQ with Answer and Explanation
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Question #1
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Who invented the liquid-fueled rocket engine, launching the world's first successful prototype in 1926?
Correct Answer: Option D
Explanation:
Robert H. Goddard launched the first liquid-fueled rocket (using gasoline and liquid oxygen) in Auburn, Massachusetts.
Robert H. Goddard launched the first liquid-fueled rocket (using gasoline and liquid oxygen) in Auburn, Massachusetts.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who discovered the planet Pluto in 1930 at the Lowell Observatory?
Correct Answer: Option A
Explanation:
Clyde Tombaugh discovered Pluto by comparing photographic plates using a blink comparator instrument.
Clyde Tombaugh discovered Pluto by comparing photographic plates using a blink comparator instrument.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who discovered that biological chemical energy transfers are regulated by specific high-energy nucleotide molecules called ATP?
Correct Answer: Option D
Explanation:
Karl Lohmann isolated Adenosine Triphosphate from muscle tissues in 1929, identifying it as the universal intracellular energy currency.
Karl Lohmann isolated Adenosine Triphosphate from muscle tissues in 1929, identifying it as the universal intracellular energy currency.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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