Who invented the electrocardiogram (ECG/EKG) device, winning a Nobel Prize in 1924? MCQ with Answer and Explanation

Question
Who invented the electrocardiogram (ECG/EKG) device, winning a Nobel Prize in 1924?
A. Hans Berger
B. Alexander Fleming
C. Willem Einthoven
D. Robert Koch
Answer: Option C
Solution (By JKSSB Mock Tests)
Willem Einthoven invented the first practical electrocardiogram in 1903 and received the Nobel Prize for it.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the common household aerosol spray can configuration was developed by whom?
A. Roy Plunkett
B. Leo Baekeland
C. Wallace Carothers
D. Erik Rotheim
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Correct Answer: Option D

Explanation:
Norwegian engineer Erik Rotheim patented the first aerosol can layout featuring pressure valves and liquid propellant mixtures in 1926.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered that the chemical element Boron is isolated by reacting boric acid with potassium metal?
A. Antoine Lavoisier
B. Jöns Jacob Berzelius
C. Joseph Louis Gay-Lussac and Louis Jacques Thénard
D. Humphry Davy
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Correct Answer: Option C

Explanation:
Gay-Lussac and Thénard independently isolated elemental boron in 1808, around the same time as Sir Humphry Davy.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the common mechanical device known as the automobile automatic transmission assembly was engineered by whom?
A. Rudolf Diesel
B. Karl Benz
C. Henry Ford
D. Earl Thompson and the General Motors team
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Correct Answer: Option D

Explanation:
Thompson designed the 'Hydra-Matic' system, which was introduced by Oldsmobile in 1939 as the first mass-market automatic transmission.
This question belongs to: Static General Knowledge Inventions and Discoveries
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