Rau’s IAS Mains Compass Science & Technology 2022 PDF
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Rau’s IAS Mains Compass Science & Technology 2022 PDF:- Today be are sharing Rau’s IAS Mains Compass Science & Technology 2022 PDF. This Rau’s IAS Mains Compass Science & Technology 2022 PDF for upcoming examination like UPSC MAINS. This notes is very helpful for upcoming various competitive exams like RPSC, LIC AAO, DSSSB, DDA, MCD, PSU, GATE, UPSC, SSC CGL, Railway, ALL STAE PCS EXAM & other common written exams. This e-book very useful for all type of competitive exams. You may download pdf document from the link provided given below.
Rau’s IAS Mains Compass Science & Technology 2022 PDF if you are doing preparation for UPSC CSE so today we have brought for you all the material Notes You can download Rau’s IAS Mains Compass Science & Technology 2022 PDF free from the given link below. these Notes will cover all important subjects of the IAS Exam like Ethics Economic Development History & Culture of India International Relations & Security etc.
Rau’s IAS Mains Compass Science & Technology 2022 PDF The UPSC Mains exam is the second stage of the Civil Services Examination. IAS aspirants who clear the Mains i.e. those who score above the cutoff in General Studies Paper I and more than 33% marks in General Studies Paper-II (CSAT) are eligible to appear for the UPSC Mains.
Rau’s IAS Mains Compass Science & Technology 2022 PDF The UPSC Mains Test Series & Quality Improvement Program for Mains has been designed to enable UPSC aspirants develop multi-dimensional perspective across themes important for IAS Mains & improve their answer writing skills through tests, test discussions, evaluation, personal mentoring and mains revision classes. Compass Magazines provide in depth analysis of each and every topic which is important for mains. Rau’s IAS Mains Compass Science & Technology 2022 PDF pdf for upcoming examination like UPSC PRE & MAINS.
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Science & Technology Question Answer
Q . What is the difference between a CFL and an LED lamp? (2011)
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.
2. The average life span of a CFL is much longer than that of an LED lamp.
3. A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?
(a.) 1 only
(b.) 2 and 3 only
(c.) 1 and 3 only
(d.) 1, 2 and 3
Solution: C
Q . A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD? (2011)
1. DVD supports Standard Definition video while BD supports High Definition video.
2. Compared to a DVD, the BD format has several times more storage capacity.
3. Thickness of BD is 2.4 mm white that of DVD is 1.2 mm.
Which of the statements given above is/are correct?
(a.) 1 only
(b.) 1 and 2 only
(c.) 2 and 3 only
(d.) 1, 2 and 3
Solution: B
Q . Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: (2011)
1. The orbit is geosynchronous.
2. The orbit is circular,
3. The orbit lies in the plane of the Earth’s equator.
4. The orbit is at an altitude of 22,236 km.
Select the correct answer using the codes given below:
(a.) 1, 2 and 3 only
(b.) 1, 3 and 4 only
(c.) 2 and 4 only
(d.) 1, 2,3 and 4
Solution: A
Q 1. What is the difference between Bluetooth and Wi-Fi devices? (2011)
(a.) Bluetooth uses 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band.
(b.) Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for Wireless Wide Area Networks (WWAN) only.
(c.) When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
(d.) The statements (a) and (b) given above are correct in this context
Solution: C
Q . What is “Virtual Private Network”? (2011)
(a.) It is a private computer network of an organization where the remote users can transmit encrypted information through the server of the organization
(b.) It is a computer network across a public internet that provides users access to their organization’s network while maintaining the security of the information transmitted
(c.) It is a computer network in which users can access a shared pool of computing resources through a service provider.
(d.) None of the statements (a), (b) and (c) given above is a correct description of Virtual Private Network
Solution: B
Q . Which of the following pair is/are correctly matched? (2014)
Spacecraft Purpose
1. Cassini-Huygens Orbiting the Venus and transmitting data to the Earth
2. Messenger Mapping and investigating the Mercury
3. Voyager 1 and 2 Exploring the outer solar system
Select the correct answer using the code given below.
1 only
2 and 3 only
1 and 3 only
1, 2 and 3
Solution: B
Q . Which reference to Agni-IV Missile, which of the following statements is/are correct? (2014)
It is a surface-to-surface missile.
It is fuelled by liquid propellant only.
It can deliver one-tonne nuclear warheads about 7500 km away.
Select the correct answer using the code given below.
1 only
2 and 3 only
1 and 3 only
1, 2 and 3
Solution: A
Q . A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is (2011)
(a.) To make it pest-resistant
(b.) To improve its taste and nutritive qualities
(c.) To make it drought-resistant
(d.) To make its shelf-life longer
Solution: A
Q . Other than resistance to pests, what are the prospects for which genetically engineered plants have been created? (2012)
1. To enable them to withstand drought
2. To increase the nutritive value of the produce
3. To enable them to grow and do photosynthesis in spaceships and space stations
4. To increase their shelf life.
Select the correct answer using the codes given below:
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4
Solution: C
Q . Recombinant DNA technology (Genetic Engineering) allows genes to be transferred (2013)
1. Across different species of plants.
2. From animals to plants.
3. From microorganisms to higher organisms.
Select the correct Solution using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Solution: A
Q . Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to (2013)
1. Resist drought and increase absorptive area
2. Tolerate extremes of PH
3. Resist disease infestation
Select the correct Solution using the codes given below:
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Solution: D
Q . In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person? (2014)
Iris scanning
Retinal scanning
Voice recognition
Select the correct answer using the code given below.
1 only
2 and 3 only
1 and 3 only
1, 2 and 3
Solution: D
Q 1. Graphene is frequently in news recently. What is its importance? (2012)
1, It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.
Which of the statements given above are correct?
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4
SOLUTION: (c)
Q . Consider the following: (2013)
1. Electromagnetic radiation
2. Geothermal energy
3.Gravitational force
4.Plate movements
5.Rotation of the earth
6. Revolution of the earth
Which of the above are responsible for bringing dynamic changes on the surface of the earth?
(a) 1, 2, 3 and 4 only
(b) 1, 3, 5 and 6 only
(c) 2, 4, 5 and 6 only
(d) 1, 2, 3, 4, 5 and 6
Solution: D
Q . During a thunderstorm, the thunder in the skies is produced by the (2013)
1. Meeting of cumulonimbus clouds in the sky
2. Lightning that separates the nimbus clouds
3. Violent upward movement of air and water particles
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3
(C) 1 and 3
(d) None of the above produces the thunder
Solution: C
Q . Consider the following phenomena: (2013)
1. Size of the sun at dusk
2. Colour of the sun at dawn
3. Moon being visible at dawn
4. Twinkle of stars in the sky
5. Polestar being visible in the sky
Which of the above are optical illusions?
(a) 1, 2 and 3
(b) 3, 4 and 5
(c) 1, 2 and 4
(d) 2, 3 and 5
Solution: C
Q . Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this? 20-13
1. Dispersion
2. Refraction
3. Internal reflection
Select the correct Solution using the codes given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Solution: A
Q . A team of scientists at Brookhaven National Laboratory including those from India created the heaviest anti-matter (anti-helium nucleus). What is/are the implication/ implications of the creation of anti-matter? (2012)
1. It will make mineral prospecting and oil exploration easier and cheaper.
2. It will help probe the possibility of the existence of stars and galaxies made of anti-matter.
3. It will help understand the evolution of the universe.
Select the correct answer using the codes given below:
(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
Solution: B
Q . The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is /are the importance/importance of discovering this particle? (2013)
1. It will enable us to understand as to why elementary particles have mass.
2. It will enable us in the near future to develop the technology to transferring matter from one point to another without traversing the physical space between them.
3. It will enable us to create better fuels for nuclear fission.
Select the correct answer using the codes given below:
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Solution: A
Q . Which of the following is /are cited by the scientists as evidence/ evidences for the continued expansion of universe? (2012)
1. Detection of microwaves in space
2. Observation of redshift phenomenon in space
3.Movement of asteroids in space
4. Occurrence of supernova explosions in space
Select the correct answer using the codes given below:
(a) 1 and 2
(b) 2 only
(c) 1, 3 and 4
(d) None of the above can be cited as evidence
Solution: B
Q 1. Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth? (2012)
(a) The Earth’s magnetic field diverts them towards its poles
(b) Ozone layer around the Earth reflects them back to outer space
(c) Moisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth
(d) None of the statements (a), (b) and (c) given above is correct
Solution: A
Q . Ball bearings are used in bicycles, cars, etc., because (2013)
(a) the actual between the is increased area of contact wheel and axle
(b) the effective between the is increased area of contact wheel and axle
(c) the effective between the is reduced area of contact wheel and axle
(d) None of the above statements is correct
Solution: C
Q . The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct? (2013)
(a) Gravity is the strongest of the four
(b) Electromagnetism act only on particles with an electric charge
(c) Weak nuclear force causes radioactivity
(d) Strong nuclear force holds protons and neutrons inside the nuclear of an atom.
Solution: A
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