scientist, discoveries & inventions MCQ section 4 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general awareness mcq - 4 EXERCISES
The following question based on scientist, discoveries & inventions topic of general awareness mcq
(a) Michael Faraday
(b) Karl Benz
(c) Thomas Savery
(d) Sir Frank Whittle
The correct answers to the above question in:
Answer: (d)
Dr Hans von Ohain and Sir Frank Whittle are both recognized as being the co-inventors of the jet engine. Each worked separately and knew nothing of the other’s work. Hans von Ohain is considered the designer of the first operational turbojet engine.
Frank Whittle was the first to register a patent for the turbojet engine in 1930. Hans von Ohain was granted a patent for his turbojet engine in 1936. However, Hans von Ohain’s jet was the first to fly in 1939. Frank Whittle’s jet first flew in 1941.
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Read more scientist discoveries and inventions Based General Awareness Questions and Answers
Question : 1
Scientist Albert Einstein is famous for
a) Planting first Nuclear Reactor
b) The prediction of the existence of neutrons
c) The interpretation of atomic structure of hydrogen
d) The photoelectric effect
Answer »Answer: (d)
Question : 2
Who among the following is the inventor of ‘X’ rays?
a) Maxwell
b) Torricelli
c) Rutherford
d) Roentgen
Answer »Answer: (d)
Question : 3
The purity of Milk is determined by
a) Thermometer
b) Hydrometer
c) Stalagmometer
d) Lactometer
Answer »Answer: (d)
Lactometer is used to check the purity of milk. The specific gravity of milk does not give a conclusive indication of its composition since milk contains a variety of substances that are either heavier or lighter than water.
The device works on the principle of Archimedes’s principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced.
Question : 4
Meteorology is the science of:
a) Earthquakes
b) Weather
c) Metals
d) Mateors
Answer »Answer: (d)
Meteorology is the scientific study of the atmosphere or weather. Meteorological phenomena are observable weather events which are explained by the science of meteorology. Those events are bound by the variables that exist in Earth’s atmosphere; temperature, air pressure, water vapor, etc.
Question : 5
Who invented the mobile phone?
a) Martin Cooper
b) Tim–Berners–Lee
c) Chuck Hull
d) Raymond Samuel Tomlinson
Answer »Answer: (a)
Martin Cooper, an American engineer, conceived the first handheld mobile phone while at Motorola in 1973. He led the team that developed it and brought it to market in 1983. He is considered the “father of the cell phone” and is also cited as the first person in history to make a handheld cellular phone call in public.
Question : 6
Crescograph was invented by
a) P.C. Mahalanobis
b) S.N. Bose
c) J.C. Bose
d) P.C. Roy
Answer »Answer: (c)
A crescograph is a device for measuring growth in plants. It was invented in the early 20th century by Sir Jagadish Chandra Bose - an Indian polymath, physicist, biologist, botanist, and archaeologist.
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