Who invented the first practical electronic digital computer with binary logic architecture, known as the Z3? MCQ with Answer and Explanation
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Question #1
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Who discovered that the chemical element Silicon is isolated from silica sands via reduction with potassium metal?
Correct Answer: Option A
Explanation:
Berzelius successfully isolated pure amorphous elemental silicon in 1824 by heating potassium fluorosilicate.
Berzelius successfully isolated pure amorphous elemental silicon in 1824 by heating potassium fluorosilicate.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the common mechanical office typewriter correction fluid ('Liquid Paper') was developed by which female innovator?
Correct Answer: Option B
Explanation:
Graham mixed white tempera paint in a blender in the 1950s to fix her typing errors, later scaling the multi-million-dollar Liquid Paper company.
Graham mixed white tempera paint in a blender in the 1950s to fix her typing errors, later scaling the multi-million-dollar Liquid Paper company.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the first practical household mechanical washing machine is attributed to which developer?
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.
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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