54 SSC CGL Science previous year questions on Science and Technology — options free on every question; 5 include the answer & explanation free, the rest unlock with PYQ Pass.
Q1 FREE PREVIEW
PYQ
Anemometer is an instrument meant for measuring __________ .
avelocity
bair masses
cwind speed
dtemperature
✓ Correct answer: c) wind speed
ExplanationAnemometer is a meteorological instrument.It is primarily used to measure wind speed and wind pressure.It plays a crucial role in weather forecasting and environmental monitoring.There are different types, such as cup anemometers and vane anemometers.Hence, the correct answer is "wind speed".
Q2 FREE PREVIEW
PYQ
Which of the following is not an operating system
aAndroid
bVista
ciOS
dOpera
✓ Correct answer: d) Opera
ExplanationAndroid is an operating system developed by Google, primarily used in mobile devices like smartphones and tablets.Vista refers to Windows Vista, an operating system developed by Microsoft, known for its use in personal computers. iOS is an operating system created by Apple Inc., used in iPhones and iPads.Opera is a web browser, not an operating system.It provides internet browsing services rather than managing hardware and software resources.Hence, the correct answer is "Opera."
Q3 FREE PREVIEW
PYQ
Who was the inventor of frozen foods?
aAlfred Nobel
bClarence Birdseye
cFrank Whittle
dIves McGaffey
✓ Correct answer: b) Clarence Birdseye
ExplanationClarence Birdseye invented a quick- freezing method in 1924. This method revolutionized the food industry by allowing foods to be frozen quickly, preserving their taste and texture.Birdseye's innovation laid the foundation for the modern frozen food industry.His quick-freezing method is responsible for the variety of frozen foods available today.It enabled consumers to have access to fruits, vegetables, meats, and other perishable items year-round.Hence, the correct answer is "Clarence Birdseye."
Q4 FREE PREVIEW
PYQ
Who invented the electric tram?
aJames Cook
bWilliam Harvey
cFyodor Pirotsky
dRobert Boyles
✓ Correct answer: c) Fyodor Pirotsky
ExplanationFyodor Pirotsky invented the electric tram.The world’s first electric tram line operated in Sestroretsk near Saint Petersburg in Russia.It was invented in 1881. The main purpose of the electric tram was to collect electricity from overloaded wires.William Harvey was an English physician who made contributions to anatomy and physiology.He describes completely the systemic circulation and properties of blood being pumped to the brain and the rest of the body by the heart.Robert Boyles is best known for Boyle's law.Boyle’s law describes the inversely proportional relationship between the absolute pressure and volume of a gas if the temperature is kept constant within a closed system.James Cook was the navigator who made the detailed map of the Newfoundland region.Hence, the correct answer is “ Fyodor Pirotsky.”
Q5 FREE PREVIEW
PYQ
Who invented the vacuum pump?
aOtto von Guericke
bCai Lun
cMelitta Bentz
dWilliam Henry Fox Talbot
✓ Correct answer: a) Otto von Guericke
ExplanationThe first vacuum pump was discovered in 1650 by Otto von Guericke and was headed by the suction pump, which dates to antiquity.A vacuum pump is a device that removes gas molecules from a sealed volume to leave behind a partial vacuum.Cai Lun is traditionally regarded as the inventor of paper and the modern papermaking process.Melitta Bentz is credited with the invention of the coffee filter.William Henry Fox Talbot is best known for his development of the calotype which is an early photographic process.Hence the correct option is “Otto von Guericke”
Q6
PYQ
Who discovered television?
aMichael Faraday
bJoseph Henry
cAbbe Caselli
dJohn Baird
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Q7
PYQ
Meter in a vehicle that calculates distance covered by the vehicle is called_________.
aSpeedometer
bOdometer
cThermometer
dKilometre
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Q8
PYQ
Who among the following devised the technique IVF (In vitro Fertilization)?
aSir Frank whittle
bRobert Edwards
cEdward Jenner
dDr. Martin Cooper
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Q9
PYQ
Who discovered colour photography?
aRobert Noyce
bEnrico Fermi
cJohn Logie Baird
dJames Clerk Maxwell
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Q10
PYQ
Who invented the waterproof raincoat?
aRobert Hooke
bCai Lun
cCharles Macintosh
dWilliam Harvey
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Q11
PYQ
Which of the following was invented by Sir Humphry Davy?
aSafety Pin
bSteam Engine
cSafety Lamp
dX-Rays
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Q12
PYQ
Who invented first working laser?
aA. H. Taylor
bW. K. Roentgen
cT. H. Maiman
dFred Morrison
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Q13
PYQ
What was invented by Zacharias Jansen?
aJet Engine
bRadium
cMicroscope
dElectric Lamp
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Q14
PYQ
What was invented by J.B. Dunlop?
aAirplane
bCar
cRubber Tyre
dRubber Boot
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Q15
PYQ
Who discovered Antarctica?
aJames Cook
bFriedrich Miescher
cGeorge Crum
dChristopher Columbus
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Q16
PYQ
Who invented the electrocardiogram (ECG)?
aWillem Einthoven
bEdward Jenner
cAntonio de Ulloa and Charles Wood
dKarl Benz
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Q17
PYQ
Edward Jenner discovered the vaccine for which of the following diseases?
aPolio
bTuberculosis
cSmallpox
dRabies
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Q18
PYQ
Which one of the following is the brightest star in the Orion Constellation?
aBetelgeuse
bAlnilam
cRigel
dEta Orionis
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Q19
PYQ
What is the other name for 'Orion' Constellation?
aPiper
bFighter
cPredator
dHunter
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Q20
PYQ
In March 2019, Superstats, a new metrics to analyse the game of____ was launched by Indian Institute of Technology (IIT) Madras researchers and ESPNcricinfo experts.
acricket
bfootball
cbadminton
dtennis
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Q21
PYQ
William Crookes was a physical chemist who discovered and named the element _____.
aplutonium
bgermanium
cthallium
dberyllium
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Q22
PYQ
Who invented the atomic battery in
aAlessandro Volta
bHenry Moseley
cBenjamin Franklin
dLouis Pasteur
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Q23
PYQ
Electron was discovered in the year 1897 by
aT. A. Edison
bNicola Tesla
cJ J Thomson
dIsaac Newton
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Q24
PYQ
__________was the first person to isolate methane gas. He discovered that methane mixed with air could be exploded using an electric spark.
aAlessandro Volta
bWilliam Thomson
cLouis Pasteur
dWilliam Crookes
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Q25
PYQ
Which one of the following is the largest recognised constellation?
aHydra
bDorado
cAntila
dCrux
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Q26
PYQ
Name the Indian Space Research Organisation (ISRO) chairman and Padma Bhushan awardee who created and unleashed a historical moment when Mars Orbiter became the first Indian spacecraft to enter Martian orbit in a maiden attempt.
aSundar Pichai
bK Radhakrishnan
cFali Nariman
dNandan Nilekani
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Q27
PYQ
The phrase 'Survival of the fittest' as a way of describing the mechanism of natural selection was coined by______.
aLouis Pasteur
bCharles Babbage
cHerbert Spencer
dMarie Curie
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Q28
PYQ
Who founded and named the science of electromagnetism?
aMichael Faraday
bJames Clerk
cHans Christian Oersted
dAndre Marie Ampère
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Q29
PYQ
Who discovered the first vaccine for smallpox?
aLouis Pasteur
bEdward Jenner
cAlexander Fleming
dJohn Hunter
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Q30
PYQ
Which scientist discovered the 'Penicillin'?
aLouis Pasteur
bAlexander Fleming
cRobert Koch
dErnst Chain
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Q31
PYQ
The American scientist Edwin Hubble's name is associated with which of these theories?
aLattice Gauge Theory
bQuantum Chromodynamics Theory
cPartial Coherence of Light Theory
dThe Big Bang Theory
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Q32
PYQ
As of January 2020, which of the following countries had NOT independently launched a human into space?
aIndia
bUSA
cRussia
dChina
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Q33
PYQ
What was the theme of the 107 th Indian Science Congress held in Bengaluru?
aFuture India : Science and Technology
bScience and Technology for National Development
cReaching the Unreached through Science and Technology
dScience and Technology: Rural Development
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Q34
PYQ
Who among the following scientists invented the Cotton Gin?
aSonny Perdue
bNorman Borlaugh
cEli Whitney
dGeorge Washington Carver
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Q35
PYQ
Who among the following scientists invented Kevlar?
aMarry Anderson
bGeorge Eastman
cStephanie Louise Kwolek
dSteve Wozniak
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Q36
PYQ
Name the physicist who is credited with the discovery of the Neutron. This 1932 discovery led to his winning the Nobel Prize.
aJ. S. Fleming
bEnrico Fermi
cMax Planck
dJames Chadwick
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Q37
PYQ
Who discovered cells in the human body?
aCharles Darwin
bRobert Hooke
cHerbert Spencer
dAlbert Einstein
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Q38
PYQ
Who among the following was the founder of Homeopathy?
aSamuel Hahnemann
bFG Hopkins
cRobert Koch
dSelman Waksman
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Q39
PYQ
Who among the following Indian-American scientists was appointed as the acting chief of staff of the US space agency NASA, in February 2021?
aRamesh Raskar
bShantanu Narayen
cBhavya Lal
dManmohan Attavar
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Q40
PYQ
What was the name of the first artificial satellite Launched by India in 1975?
aCharaka
bPanini
cSushruta
dAryabhatta
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Q41
PYQ
Who among the following developed the Polio vaccine?
aJonas Salk
bRobert Koch
cFG Hopkins
dEdward Jenner
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Q42
PYQ
Who among the following is the founder of the field of psychoanalysis?
aCarl Jung
bJean Piaget
cSigmund Freud
dKai T Erikson
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Q43
PYQ
Who among the following was the first to conclude that in a vacuum all objects fall with the same acceleration g and reach the ground at the same time?
aAbert Einstein
bGalileo Galilei
cThomas Alva Edison
dIsaac Newton
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Q44
PYQ
In early 1610, who discovered with his newly invented telescope that Jupiter has four moons?
aSimon Marius
bTycho Brahe
cGalileo Galilei
dJohannes Kepler
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Q45
PYQ
_______ is reducing the degree or intensity of, or eliminating, pollution.
aAbatement
bAerosol
cAbsorption
dAeration
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Q46
PYQ
Which measuring instrument consists of a metal triangular frame supported on three legs, used to measure the radius of curvature of an object such as lenses and curved mirrors which are spherical in shape?
aViscometer
bSpherometer
cVerniercaliper
dScrew gauge
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Q47
PYQ
In the early nineteenth century, who demonstrated that there are fourteen space lattices, or regularly repeating arrangements of points in space, that differ in symmetry and geometry?
aAuguste Bravais
bWilliam Bragg
cJerome Karle
dCharles Frank
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Q48
PYQ
Which scientist suggested that the magnet must also exert an equal and opposite force on the current-carrying conductor?
aMichael Faraday
bAndre Marie Ampere
cJoseph Henry
dWilliam Gilbert
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Q49
PYQ
As per physicists and their major contributions/discoveries, Which of the following pair is INCORRECT?
aJohn Bardeen – Theory of superconductivity
bLouis Victor de Broglie – Wavenature of matter
cVictor Francis Hess – Cosmic radiation
dPaul Dirac – Liquid helium
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Q50
PYQ
In which year was the Doppler effect discovered by Austrian scientist Christian Doppler, that describes the change in frequency of any kind of sound or light wave produced by a moving source with respect to an observer?
a1846
b1844
c1842
d1840
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Q51
PYQ
In which year did the English scientist Michael Faraday discover benzene in the illuminating gas?
a1820
b1827
c1822
d1825
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Q52
PYQ
In which year did E Gorter and F Grendel make a breakthrough by examining the surface area of lipids and concluded that the lipid surface surrounding cells must be of two layers?
a1910
b1925
c1945
d1962
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Q53
PYQ
In 1845, which German chemist published a method for the synthesis of acetic acid, a natural product containing two carbon atoms?
aFriedrich Wohler
bMarcellin Berthelot
cJoseph Gay-Lussac
dHermann Kolbe
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Q54
PYQ
Who explained the structure and reproductive system of algae in 1935?
aMOP Iyengar
bF.E. Fritsch
cWilliam Henry
dCarolus Linnaeus
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