Who invented the first practical mechanical television system? MCQ with Answer and Explanation
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Question #1
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The invention of the common mechanical elevator safety brake system was publicly demonstrated at the World's Fair by whom?
Correct Answer: Option A
Explanation:
Otis dramatic demonstration in 1854 involved cutting the platform support rope while standing on it, proving the safety gear worked.
Otis dramatic demonstration in 1854 involved cutting the platform support rope while standing on it, proving the safety gear worked.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the common automotive safety equipment known as the three-point seatbelt was patented by whom?
Correct Answer: Option A
Explanation:
Swedish engineer Nils Bohlin developed the modern cross-lap safety harness configuration in 1959, saving countless lives across traffic boundaries.
Swedish engineer Nils Bohlin developed the modern cross-lap safety harness configuration in 1959, saving countless lives across traffic boundaries.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the barcode system for scanning retail merchandise was patented by whom?
Correct Answer: Option B
Explanation:
Woodland and Silver patented the bullseye and linear barcode design in 1952, inspired by Morse code tracking patterns.
Woodland and Silver patented the bullseye and linear barcode design in 1952, inspired by Morse code tracking patterns.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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