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) S. Chandrashekhar
(b) Jagdish Chandra Bose
(c) Har Govind Khurana
(d) C.V. Raman
The correct answers to the above question in:
Answer: (b)
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Question : 1
Who invented Portland Cement?
a) Percy L. Spencer
b) Leonardo da Vinci
c) Joseph Aspdin
d) Denis Gason
Answer »Answer: (c)
Joseph Aspdin, a British bricklayer from Leeds, is considered to be the originator of Portland cement. A process for the manufacture of Portland cement was patented in 1824.
This cement was an artificial cement similar in properties to the material known as "Roman cement.” Aspdin's process was similar to a process patented in 1822 and used since 1811 by James Frost who called his cement "British Cement".
Question : 2
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).
Question : 3
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 : 4
The fourth dimension in Physics was introduced by
a) Galileo
b) Neil Bohr
c) Newton
d) Einstein
Answer »Answer: (d)
Question : 5
Har Govind Khorana is credited for the discovery of
a) Synthesis of Nitrogenous
b) None of the above
c) Synthesis of Protein
d) Synthesis of Gene
Answer »Answer: (c)
Question : 6
Arboriculture is the study of:
a) Art of growing crops
b) Cultivation of trees and vegetables
c) Science of plant life
d) Art of garden cultivation
Answer »Answer: (b)
Arboriculture is the cultivation, management, and study of individual trees, shrubs, vines, vegetables and other perennial woody plants.
It is primarily focused on individual woody plants and trees maintained for permanent landscape and amenity purposes, usually in gardens, parks or other populated settings, by arborists, for the enjoyment, protection, and benefit of human beings.
It falls under the general umbrella of horticulture.
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