The invention of the common household aerosol spray can configuration was developed by whom? MCQ with Answer and Explanation

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The invention of the common household aerosol spray can configuration was developed by whom?

A. Erik Rotheim

B. Leo Baekeland

C. Wallace Carothers

D. Roy Plunkett

Answer: Option A

Solution (By JKSSB Mock Tests)

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

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Who discovered that the Earth's core is divided into solid inner and liquid outer layers?

A. Andrija Mohorovičić

B. Inge Lehmann

C. Charles Richter

D. Beno Gutenberg

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Correct Answer: Option B

Explanation:
Danish seismologist Inge Lehmann discovered the Earth's solid inner core in 1936 by studying seismic wave travel paths.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the existence of blood capillaries linking arteries to veins, completing Harvey's circulation theory?

A. Robert Hooke

B. Marcello Malpighi

C. Antonie van Leeuwenhoek

D. William Harvey

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Correct Answer: Option B

Explanation:
Marcello Malpighi used primitive microscopes to observe capillaries in lung tissues in 1661.

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Question #3

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Who invented the first practical modern typewriter with a QWERTY keyboard layout?

A. Christopher Latham Sholes

B. William Austin Burt

C. Thomas Edison

D. Pellegrino Turri

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Correct Answer: Option A

Explanation:
Christopher Latham Sholes invented the first commercially practical mechanical typewriter and developed the QWERTY keyboard layout to prevent jamming.

This question belongs to: Static General Knowledge Inventions and Discoveries

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