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. Henry Bessemer
B. James Watt
C. Thomas Edison
D. Elisha Otis
Answer: Option D
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
Who discovered the first human virus ever identified, the Yellow Fever virus?
A. Walter Reed and his team
B. Robert Koch
C. Dmitri Ivanovsky
D. Louis Pasteur
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Correct Answer: Option A

Explanation:
The U.S. Army Yellow Fever Commission led by Walter Reed isolated and proved the disease was caused by a filterable virus vector.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the mechanical calculating machine named 'Pascaline' in 1642 was completed by whom?
A. Gottfried Wilhelm Leibniz
B. Charles Babbage
C. Blaise Pascal
D. René Descartes
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Correct Answer: Option C

Explanation:
Blaise Pascal invented the Pascaline to assist his father, a tax commissioner, in performing arithmetic addition and subtraction.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who invented the standard mechanical marine propeller that replaced paddle wheels on ships?
A. John Ericsson and Francis Pettit Smith
B. Charles Parsons
C. Robert Fulton
D. James Watt
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Correct Answer: Option A

Explanation:
Ericsson and Smith independently patented efficient screw propeller designs in 1836, enabling faster transoceanic transport.
This question belongs to: Static General Knowledge Inventions and Discoveries
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