scientist, discoveries & inventions MCQ section 3 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) Galileo
(b) Newton
(c) Copernicus
(d) John Hadley
The correct answers to the above question in:
Answer: (c)
Nicolaus Copernicus discovered the Solar System. He was the first astronomer who formulated a comprehensive heliocentric cosmology in his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Celestial Spheres), which displaced the Earth from the center of the universe.
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Question : 1
Planimeter is used to measure:
a) Areas
b) Height of a region
c) Road Distance
d) Direction
Answer »Answer: (a)
A planimeter, also known as a platometer, is a measuring instrument used to determine the area of an arbitrary two-dimensional shape. They were once common, but have now largely been replaced by digital tools. The Swiss mathematician Jakob AmslerLaffon built the first modern planimeter in 1854.
Question : 2
Waksman got the Nobel Prize for the discovery of :
a) Penicillin
b) Streptomycin
c) Neomycin
d) Chloromycetin
Answer »Answer: (b)
Selman Waksman was awarded the Nobel Prize in 1952 “for his discovery of streptomycin, the first antibiotic effective against tuberculosis.” He was called “one of the greatest benefactors to mankind,” as the result of the discovery of streptomycin. Waksman was a Russian-born, Jewish-American inventor, biochemist and microbiologist.
Question : 3
Who invented aeroplane ?
a) Christian Huygens
b) Orville Wright and Wilbur Wright
c) Michael Faraday
d) Sir Frank Whittle
Answer »Answer: (b)
The Wright brothers, Orville and Wilbur, were two American brothers, inventors, and aviation pioneers who were credited with inventing and building the world's first successful aeroplane and making the first controlled, powered and sustained heavier-than-air human flight, on December 17, 1903.
In the two years afterwards, the brothers developed their flying machine into the first practical fixed-wing aircraft.
Question : 4
Which of the following pairing is incorrect?
a) Seismograph Earthquakes
b) Hygrometer Water vapour content of the atmosphere
c) Anemometer Speed of the wind
d) Lactometer Specific gravity of liquids
Answer »Answer: (d)
Lactometer is a device used to measure the specific gravity, and therefore the richness, of milk.
It is based on the law of floatation which states that when a solid is immersed in a liquid, it is subject to upward thrust equal to the weight of the liquid displaced by the body and acting in an upward direction. It is useful for testing the purity of milk.
Question : 5
Who is recognised as the Father of Geometry ?
a) Rene Descartes
b) Pythagoras
c) Johann Kepler
d) Euclid
Answer »Answer: (d)
Euclid, also known as Euclid of Alexandria, was a Greek mathematician, often referred to as the “Father of Geometry”.
He was active in Alexandria during the reign of Ptolemy I (323–283 BC). Euclid deduced the principles of what is now called Euclidean geometry from a small set of axioms. Euclid also wrote works on perspective, conic sections, spherical geometry, number theory and rigour.
Although many of the results in Elements originated with earlier mathematicians, one of Euclid’s accomplishments was to present them in a single, logically coherent framework, making it easy to use and easy to reference, including a system of rigorous mathematical proofs that remains the basis of mathematics 23 centuries later.
Question : 6
Infrared radiations are detected by
a) Spectrometer
b) Pyrometer
c) Photometer
d) Nanometer
Answer »Answer: (c)
A photometer is an instrument that can be used for absorption, emission or fluorescence measurement with ultraviolet, visible or infrared radiation. It has filters for wavelength selection and a photoelectric device for measuring radiation (Detection and Analysis by E. N. Ramsden).
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