GK - Inventions and Discoveries
36.
Who invented Jet Engine?
Answer
Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle started first, von Ohain was first to design and develop a turbojet engine to power an aircraft.
Answer :
Option AExplanation :
Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle started first, von Ohain was first to design and develop a turbojet engine to power an aircraft.
37.
The inventor of piano is
Answer
The piano was invented in Italy by Bartolomeo Cristofori around the year 1700 (the exact year is uncertain).
Answer :
Option AExplanation :
The piano was invented in Italy by Bartolomeo Cristofori around the year 1700 (the exact year is uncertain).
38.
Who has given the phenomena of Blood Circulation ?
Answer
William Harvey was the first person to correctly describe blood’s circulation in the body.
Answer :
Option DExplanation :
William Harvey was the first person to correctly describe blood’s circulation in the body.
39.
X-rays were discovered by
Answer
X-rays were discovered in 1895 by Wilhelm Conrad Roentgen who was a Professor at Wuerzburg University in Germany. Working with a cathode-ray tube in his laboratory, Roentgen observed a fluorescent glow of crystals on a table near his tube.
Answer :
Option DExplanation :
X-rays were discovered in 1895 by Wilhelm Conrad Roentgen who was a Professor at Wuerzburg University in Germany. Working with a cathode-ray tube in his laboratory, Roentgen observed a fluorescent glow of crystals on a table near his tube.
40.
In which decade was the Internet first implemented ?
Answer
The first message was sent over the ARPANET in 1969 from computer science Professor Leonard Kleinrock's laboratory at University of California, Los Angeles (UCLA) to the second network node at Stanford Research Institute (SRI).
Answer :
Option CExplanation :
The first message was sent over the ARPANET in 1969 from computer science Professor Leonard Kleinrock's laboratory at University of California, Los Angeles (UCLA) to the second network node at Stanford Research Institute (SRI).
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