Who invented the standard mechanical marine propeller that replaced paddle wheels on ships? MCQ with Answer and Explanation

Who invented the standard mechanical marine propeller that replaced paddle wheels on ships?

A. John Ericsson and Francis Pettit Smith

B. James Watt

C. Robert Fulton

D. Charles Parsons

Answer: Option A

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

No comments yet. Be the first to start the discussion!

Question #1 Report Error

The invention of the common electrical structural device known as the coaxial cable was patented in its modern form by whom?

A. Michael Faraday

B. Lloyd Espenschied and Herman Affel

C. Alexander Graham Bell

D. Nikola Tesla

Correct Answer: Option B

Explanation:
Espenschied and Affel engineered the concentric dual-conductor configuration at Bell Labs in 1929 for high-frequency radio networks.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

The invention of the common computing operating system layout known as Unix was co-developed by whom?

A. Bill Gates

B. Linus Torvalds

C. Ken Thompson and Dennis Ritchie

D. Steve Jobs

Correct Answer: Option C

Explanation:
Thompson and Ritchie engineered Unix at Bell Labs in 1969, establishing foundational standards for multitasking operating systems.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

Who discovered the fundamental principle of inheritance known as the Law of Independent Assortment?

A. Gregor Mendel

B. Thomas Hunt Morgan

C. Francis Crick

D. Charles Darwin

Correct Answer: Option A

Explanation:
Gregor Mendel discovered the laws of segregation and independent assortment through careful calculation of pea hybrid phenotypes.

This question belongs to: Static General Knowledge Inventions and Discoveries