Who invented the safety elevator in 1852, which prevented the cab from falling if the cable broke? MCQ with Answer and Explanation

Question
Who invented the safety elevator in 1852, which prevented the cab from falling if the cable broke?
A. Elisha Otis
B. James Watt
C. Thomas Edison
D. Henry Bessemer
Answer: Option A
Solution (By JKSSB Mock Tests)
Elisha Otis invented the elevator safety brake in 1852, making skyscrapers practical and safe.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Practice More Inventions and Discoveries Questions

Question #1
The invention of the common chemical element symbol notation system ($H, O, Ca$) used today was developed by whom?
A. Antoine Lavoisier
B. Jöns Jacob Berzelius
C. John Dalton
D. Dmitri Mendeleev
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Correct Answer: Option B

Explanation:
Berzelius introduced letter symbols based on Latin element names in 1813, replacing Dalton's cumbersome symbolic diagrams.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered the first known antibiotic substance produced by soil actinomycetes, Actinomycin?
A. Alexander Fleming
B. Selman Waksman
C. Robert Koch
D. Louis Pasteur
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Correct Answer: Option B

Explanation:
Selman Waksman and his student H. Boyd Woodruff isolated actinomycin in 1940, sparking targeted soil microbe screening programs.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the common mechanical office typewriter correction tape ribbon method was developed by which company?
A. Underwood
B. Remington
C. Smith Corona
D. IBM on the Selectric typewriter series
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Correct Answer: Option D

Explanation:
IBM integrated specialized adhesive lift-off correction ribbons into Selectric mechanical ball typing tracking frameworks in 1973.
This question belongs to: Static General Knowledge Inventions and Discoveries
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