scientist, discoveries & inventions MCQ section 2 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) Dr. K.S. Krishna
(b) None of the above
(c) Prof. Satish Dhawan
(d) Homi J. Bhabha
The correct answers to the above question in:
Answer: (d)
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Question : 1
Which of the following is Study of fossils ?
a) Palaeontology
b) Ethology
c) Anthropology
d) Etiology
Answer »Answer: (a)
Palaeontology is the study of fossils to determine the structure and evolution of extinct animals and plants and the age and conditions of deposition of the rock strata in which they are found. Body fossils and trace fossils are the principal types of evidence about ancient life.
Question : 2
Who invented the laser?
a) Dr. Charles H. Jones
b) Sir Frank Whittle
c) T.H. Maiman
d) Fred Morrisson
Answer »Answer: (c)
A laser is a device that emits light (electromagnetic radiation) through a process of optical amplification based on the stimulated emission of photons.
On May 16, 1960, Theodore H. Maiman operated the first functioning laser, at Hughes Research Laboratories, Malibu, California, ahead of several research teams, including those of Townes, at Columbia University, Arthur Schawlow, at Bell Labs, and Gould, at the TRG (Technical Research Group) company.
Question : 3
An anemometer measures which of the following ?
a) Speed of satellites
b) Speed of light
c) Speed of water current
d) Speed of wind
Answer »Answer: (d)
An anemometer is a device used for measuring wind speed. The term is derived from the Greek word anemos (wind). The first known description of an anemometer was given by Leon Battista Alberti in 1450.
Question : 4
Leprosy bacillus was invented by
a) Harvey
b) Koch
c) Fleming
d) Hansen
Answer »Answer: (b)
Mycobacteriumleprae, the causative agent of leprosy, was discovered by G. H. Armauer Hansen in Norway in 1873. Hansen observed a number of non-refractile small rods in unstained tissue sections.
The rods were not soluble in potassium lye, and they were acid- and alcohol-fast. In 1879, he was able to stain these organisms with Ziehl’s method and the similarities with Koch’s bacillus (Mycobacterium tuberculosis) were noted.
Question : 5
Who is the discoverer of Penicillin?
a) Christopher Macdonald
b) Albert Einstein
c) Alexander Graham Bell
d) Alexander Fleming
Answer »Answer: (d)
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