The invention of the common mechanical device known as the modern coin-operated parking meter was patented by whom? MCQ with Answer and Explanation

Question
The invention of the common mechanical device known as the modern coin-operated parking meter was patented by whom?
A. James Ritty
B. Walter Hunt
C. Garrett Morgan
D. Carl Magee
Answer: Option D
Solution (By JKSSB Mock Tests)
Carl Magee patented the 'Park-O-Meter' in Oklahoma City in 1935 to regulate downtown vehicle traffic turnover.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered that the chemical element Titanium is isolated from dark mineral iron sand matrices?
A. Antoine Lavoisier
B. Martin Heinrich Klaproth
C. Jöns Jacob Berzelius
D. William Gregor
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Correct Answer: Option D

Explanation:
English clergyman William Gregor discovered titanium in ilmenite mineral sands in 1791, naming it 'menaccanite'.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the common mechanical combination lock system used in bank vaults was patented by whom?
A. Elisha Otis
B. Alexander Mitchell
C. Walter Hunt
D. Linus Yale Jr.
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Correct Answer: Option D

Explanation:
Linus Yale Jr. patented the secure pin-tumbler lock and combination wheel locks in the 1860s.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered the enzyme Lysozyme and later discovered penicillin?
A. Howard Florey
B. Alexander Fleming
C. Edward Jenner
D. Louis Pasteur
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Correct Answer: Option B

Explanation:
Sir Alexander Fleming discovered lysozyme (an antimicrobial enzyme found in tears and saliva) in 1921 before discovering penicillin in 1928.
This question belongs to: Static General Knowledge Inventions and Discoveries
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