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) Diesel
(b) Charles
(c) Daimler
(d) Davy
The correct answers to the above question in:
Answer: (c)
Gottlieb Daimler invented the prototype of the modern gasoline engine in 1885. This gas engine was made with a vertical cylinder, and gasoline injected through a carburetor (patented in 1887). Daimler first built a two-wheeled vehicle the "Reitwagen" (Riding Carriage) with this engine and a year later built the world's first four-wheeled motor vehicle.
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Read more scientist discoveries and inventions Based General Awareness Questions and Answers
Question : 1
Match List-I with List-II and select the correct answer using the code given below the lists.
List I | List II |
A. Alfred Nobel | 1. Theory of Evolution |
B. Alexander Fleming | 2. Dynamite |
C. Charles Darwin | 3. Penicillin |
D. Madam Curie | 4. Isolation of radium |
a) 3 2 1 4
b) 1 4 3 2
c) 1 2 3 4
d) 2 3 1 4
Answer »Answer: (d)
Question : 2
Venturimeter is used to measure:
a) liquid density
b) rate of flow of liquids
c) surface tension
d) liquid pressure
Answer »Answer: (b)
A venturi meter is used to measure the flow speed of a fluid in a pipe. It is essentially a short pipe consisting of two conical parts with a short portion of the uniform cross-section in between.
It is always used in a way that the upstream part of the flow takes place through the short conical portion while the downstream part of the flow is through the long one.
Question : 3
Who invented optical fibre?
a) T.H. Maimah
b) Samuel Cohen
c) Percy L. Spencer
d) Narinder Kapany
Answer »Answer: (d)
An optical fibre (or optical fibre) is a flexible, transparent fibre made of glass (silica) or plastic, slightly thicker than a human hair. It functions as a waveguide, or “light pipe”, to transmit light between the two ends of the fibre.
The field of applied science and engineering concerned with the design and application of optical fibres is known as fibre optics. Optical fibres are widely used in fibre-optic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communication.
Narinder Singh Kapany (born 31 October 1926 in Moga, Punjab, India) is an Indian born American physicist who invented optical fibre.
Question : 4
Humidity is measured by
a) Hygrometer
b) Lactometer
c) Thermometer
d) Polarimeter
Answer »Answer: (a)
A hygrometer is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed.
Question : 5
Root pressure is measured by
a) Auxanometer
b) Barometer
c) Manometer
d) Atmometer
Answer »Answer: (a)
Root pressure is measured by an instrument called an auxanometer. The auxanometer measures plant growth as well as the pressure developed within the xylem cells of roots.
Question : 6
Who invented Penicillin ?
a) Edward Jenner
b) William Harvey
c) Alexander Fleming
d) Louis Pasteur
Answer »Answer: (c)
Alexander Fleming was a Scottish biologist, pharmacologist and botanist. His best-known discoveries are the enzyme lysozyme in 1923 and the antibiotic substance penicillin from the mould Penicillium notatum in 1928, for which he shared the Nobel Prize in Physiology or Medicine in 1945 with Howard Florey and Ernst Boris Chain.
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