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UPSC Science & Technology PYQs 2008 | Vaidra | Vaidra
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Science & Technology UPSC PYQ 2008

50 questions from the UPSC 2008 examination.

50 questions

1Mediumprelims2 marks
Physics

A person is sitting in a car which is at rest. The reaction from the road at each of the four wheels of the car is R. When the car runs on a straight level road, how will the reaction at either of the front wheels vary?

AIt will be greater than R
BIt will be less than R
CIt will be equal to R
DIt shall depend on the material of the road
2Mediumprelims2 marks
Space Technology & Astronomy

What is the purpose of the US Space Agency's Themis Mission, which was recently in the news?

ATo study the possibility of life on Mars
BTo study the satellites of Saturn
CTo study the colourful display of high latitude skies
DTo build a space laboratory to study the stellar explosions
3Easyprelims2 marks
Biology

What is the pH level of blood of a normal person?

A4·5 – 4·6
B6·45 – 6·55
C7·35 – 7·45
D8·25 – 8·35
4Easyprelims2 marks
Physics

How can the height of a person who is six feet tall be expressed (approximately) in nanometres?

A183 × 10⁶ nanometres
B234 × 10⁶ nanometres
C183 × 10⁷ nanometres
D234 × 10⁷ nanometres
5Easyprelims2 marks
Science & Technology Institutions

Which of the following pairs are correctly matched? Institute — Location 1. National Centre for Cell Science : Mysore 2. Centre for DNA Fingerprinting and Diagnostics : Hyderabad 3. National Brain Research Centre : Gurgaon Select the correct answer using the code given below:

A1, 2 and 3
B1 and 2 only
C2 and 3 only
D1 and 3 only
6Mediumprelims2 marks
Biology

Assertion (A): In human body, liver has an important role in fat digestion. Reason (R): Liver produces two important fat-digesting enzymes.

ABoth A and R are individually true and R is the correct explanation of A
BBoth A and R are individually true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true
7Easyprelims2 marks
Health & Diseases

Consider the following statements about probiotic food: 1. Probiotic food contains live bacteria which are considered beneficial to humans. 2. Probiotic food helps in maintaining gut flora. Which of the statements given above is/are correct?

A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2
8Easyprelims2 marks
Health & Diseases

Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

AHydrogen and oxygen
BOxygen and acetylene
CMethane and air
DCarbon dioxide and methane
9Easyprelims2 marks
Chemistry

What is Agent Orange?

AAn ace spying group trained by the Police in London
BA weed-killing chemical used by the US Military in the Vietnam War
CA technique used in the advanced railway safety procedure
DA special chemical used in making alloy steel
10Easyprelims2 marks
Space Technology & Astronomy

In order of their distances from the Sun, which of the following planets lie between Mars and Uranus?

AEarth and Jupiter
BJupiter and Saturn
CSaturn and Earth
DSaturn and Neptune
11Easyprelims2 marks
Chemistry

Which one of the following is also called Stranger Gas?

AArgon
BNeon
CXenon
DNitrous oxide
12Mediumprelims2 marks
Energy & Environment

In which one of the following locations is the International Thermonuclear Experimental Reactor (ITER) project to be built?

ANorthern Spain
BSouthern France
CEastern Germany
DSouthern Italy
13Mediumprelims2 marks
Quantitative Aptitude

There are two identical red, two identical black and two identical white balls. In how many different ways can the balls be placed in the cells (each cell to contain one ball) shown above such that balls of the same colour do not occupy any two consecutive cells?

A15
B18
C24
D30
14Easyprelims2 marks
Quantitative Aptitude

A schoolteacher has to select the maximum possible number of different groups of 3 students out of a total of 6 students. In how many groups any particular student will be included?

A6
B8
C10
D12
15Easyprelims2 marks
Quantitative Aptitude

March 1, 2008 was Saturday. Which day was it on March 1, 2002?

AThursday
BFriday
CSaturday
DSunday
16Mediumprelims2 marks
Physics

Consider the following statements: 1. A widely used musical scale called diatonic scale has seven frequencies. 2. The frequency of the note Sa (स) is 256 Hz and that of Ni (नी) is 512 Hz. Which of the statements given above is/are correct?

A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2
17Easyprelims2 marks
Chemistry

Who among the following discovered heavy water?

AHeinrich Hertz
BH. C. Urey
CG. Mendel
DJoseph Priestley
18Easyprelims2 marks
Energy & Environment

With which one of the following is BRIT (Government of India) engaged?

ARailway Wagons
BInformation Technology
CIsotope Technology
DRoad Transport
19Easyprelims2 marks
Biology

Which one of the following is an insectivorous plant?

APassion flower plant
BPitcher plant
CNight queen
DFlame of the forest
20Mediumprelims2 marks
Logical Reasoning & Puzzles

How many different triangles are there in the figure shown above?

A28
B24
C20
D16
21Easyprelims2 marks
Quantitative Aptitude

What is the number of terms in the series 117, 120, 123, 126, ..., 333?

A72
B73
C76
D79
22Mediumprelims2 marks
Science & Technology History

Who among the following scientists shared the Nobel Prize in Physics with his son?

AMax Planck
BAlbert Einstein
CWilliam Henry Bragg
DEnrico Fermi
23Easyprelims2 marks
Defence Technology

From which one of the following did India buy the Barak anti-missile defence systems?

AIsrael
BFrance
CRussia
DUSA
24Easyprelims2 marks
Materials & Engineering

What are Rubies and Sapphires chemically known as?

ASilicon dioxide
BAluminium oxide
CLead tetroxide
DBoron nitride
25Easyprelims2 marks
Biology

In which one of the following kinds of organisms is the phenomenon found wherein the female kills the male after copulation?

ADragonfly
BHoneybee
CSpider
DPit viper
26Mediumprelims2 marks
Quantitative Aptitude

A person purchases 100 pens at a discount of 10%. The net amount of money spent by the person to purchase the pens is Rs 600. The selling expenses incurred by the person are 15% on the net cost price. What should be the selling price for 100 pens in order to earn a profit of 25%?

ARs 802·50
BRs 811·25
CRs 862·50
DRs 875
27Easyprelims2 marks
Quantitative Aptitude

In how many different ways can four books A, B, C and D be arranged one above another in a vertical order such that the books A and B are never in continuous position?

A9
B12
C14
D18
28Easyprelims2 marks
Quantitative Aptitude

There are 6 different letters and 6 correspondingly addressed envelopes. If the letters are randomly put in the envelopes, what is the probability that exactly 5 letters go into the correctly addressed envelopes?

AZero
B1/6
C1/2
D5/6
29Mediumprelims2 marks
Quantitative Aptitude

In how many different ways can all of 5 identical balls be placed in the cells shown above such that each row contains at least 1 ball?

A64
B81
C84
D108
30Mediumprelims2 marks
Science & Technology History

Which of the following pairs is/are correctly matched? Theory/Law — Associated Scientist 1. Continental Drift : Edwin Hubble 2. Expansion of Universe : Alfred Wegener 3. Photoelectric Effect : Albert Einstein Select the correct answer using the code given below:

A2 and 3 only
B3 only
C2 only
D1 only
31Mediumprelims2 marks
Physics

Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature.

ABoth A and R are individually true and R is the correct explanation of A
BBoth A and R are individually true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true
32Easyprelims2 marks
Physics

Assertion (A): In the visible spectrum of light, red light is more energetic than green light. Reason (R): The wavelength of red light is more than that of green light.

ABoth A and R are individually true and R is the correct explanation of A
BBoth A and R are individually true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true
33Easyprelims2 marks
Quantitative Aptitude

Carpenter A can make a chair in 6 hours, carpenter B in 7 hours and carpenter C in 8 hours. If each carpenter works for 8 hours per day, how many chairs will be made in 21 days?

A61
B67
C73
D79
34Easyprelims2 marks
Space Technology & Astronomy

Selene-1, the lunar orbiter mission belongs to which one of the following?

AChina
BEuropean Union
CJapan
DUSA
35Easyprelims2 marks
Science & Technology History

Nobel Prize–winning scientist James D. Watson is known for his work in which area?

AMetallurgy
BMeteorology
CEnvironmental protection
DGenetics
36Easyprelims2 marks
Defence Technology

In the context of the Indian defence, what is ‘Dhruv’?

AAircraft-carrying warship
BMissile-carrying submarine
CAdvanced light helicopter
DIntercontinental ballistic missile
37Easyprelims2 marks
Quantitative Aptitude

Which one of the following is the correct sequence in respect of the Roman numerals—C, D, L and M?

AC > D > L > M
BM > L > D > C
CM > D > C > L
DL > C > D > M
38Easyprelims2 marks
Chemistry

What is Bisphenol A (BPA)?

AA medical test for detecting cancer
BA test for testing the use of drugs to improve performance by athletes
CA chemical used for the development of food-packaging materials
DA special type of alloy steel
39Easyprelims2 marks
Space Technology & Astronomy

Which one of the following is a spacecraft?

AApophis
BCassini
CSpitzer
DTechSar
40Easyprelims2 marks
Chemistry

Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

ALithium and mercury
BLithium and osmium
CAluminium and osmium
DAluminium and mercury
41Easyprelims2 marks
Physics

Which one of the following laser types is used in a laser printer?

ADye laser
BGas laser
CSemiconductor laser
DExcimer laser
42Mediumprelims2 marks
Energy & Environment

In the year 2007, an earthquake led to massive radioactive water leakage in the largest nuclear plant in the world. In which country did it occur?

AGermany
BCanada
CJapan
DUSA
43Easyprelims2 marks
Biology

Among the following, which one lays eggs and does not produce young ones directly?

AEchidna
BKangaroo
CPorcupine
DWhale
44Mediumprelims2 marks
Logical Reasoning & Puzzles

In the series AABABCABCDABCDE... which letter occupies the 100th position?

AH
BI
CJ
DK
45Mediumprelims2 marks
Energy & Environment

Where was the first desalination plant in India to produce one lakh litres freshwater per day based on low temperature thermal desalination principle commissioned?

AKavaratti
BPort Blair
CMangalore
DValsad
46Mediumprelims2 marks
Space Technology & Astronomy

ISRO successfully conducted a rocket test using cryogenic engines in the year 2007. Where is the test-stand used for the purpose, located?

ABalasore
BThiruvananthapuram
CMahendragiri
DKarwar
47Easyprelims2 marks
Science & Technology History

Which of the following pairs is/are correctly matched? 1. Francis Collins — Mapping human genome 2. Sergey Brin : Google Search Engine 3. Jimmy Wales — Wikipedia Select the correct answer using the code given below:

A1 and 2 only
B2 and 3 only
C3 only
D1, 2 and 3
48Easyprelims2 marks
Biology

Norman Ernest Borlaug who is regarded as the father of the Green Revolution in India is from which country?

AUnited States of America
BMexico
CAustralia
DNew Zealand
49Mediumprelims2 marks
Quantitative Aptitude

In an examination, 70% of the students passed in the Paper I, and 60% of the students passed in the Paper II. 15% of the students failed in both the papers while 270 students passed in both the papers. What is the total number of students?

A600
B580
C560
D540
50Mediumprelims2 marks
Space Technology & Astronomy

Consider the following statements in respect of a jet engine and a rocket: 1. A jet engine uses the surrounding air for its oxygen supply and so is unsuitable for motion in space. 2. A rocket carries its own supply of oxygen in the gas form, and fuel. Which of the statements given above is/are correct?

A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2
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