Who invented the first thermionic valve (vacuum tube diode) in 1904? MCQ with Answer and Explanation
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Question #1
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The first practical mechanical sewing machine was patented by whom in 1846?
Correct Answer: Option C
Explanation:
Elias Howe patented the first practical lockstitch sewing machine in the United States in 1846.
Elias Howe patented the first practical lockstitch sewing machine in the United States in 1846.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the common chemical process for mass-producing high-grade steel from molten pig iron is named after whom?
Correct Answer: Option D
Explanation:
The Bessemer Process removes structural impurities via air blasting through molten iron matrices, decreasing production costs.
The Bessemer Process removes structural impurities via air blasting through molten iron matrices, decreasing production costs.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common mechanical marine escape capsule configuration was engineered by whom?
Correct Answer: Option A
Explanation:
Fulton optimized underlying physical buoyancy balances, generating early blueprints for underwater tracking and marine transport apparatus.
Fulton optimized underlying physical buoyancy balances, generating early blueprints for underwater tracking and marine transport apparatus.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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