What is the number of terms in the series 117, 120, 123, 126, ..., 333?
- (a)72
- (b)73
- (c)76
- (d)79
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Official answer(b) 73
Science & Technology
923 questions asked in UPSC Prelims.
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?
- (a)9
- (b)12
- (c)14
- (d)18
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Official answer(b) 12
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?
- (a)61
- (b)67
- (c)73
- (d)79
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Official answer(c) 73
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%?
- (a)Rs 802·50
- (b)Rs 811·25
- (c)Rs 862·50
- (d)Rs 875
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Official answer(c) Rs 862·50
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?
- (a)6
- (b)8
- (c)10
- (d)12
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Official answer(c) 10
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?
- (a)600
- (b)580
- (c)560
- (d)540
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Official answer(a) 600
What is Bisphenol A (BPA)?
- (a)A medical test for detecting cancer
- (b)A test for testing the use of drugs to improve performance by athletes
- (c)A chemical used for the development of food-packaging materials
- (d)A special type of alloy steel
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Official answer(c) A chemical used for the development of food-packaging materials
March 1, 2008 was Saturday. Which day was it on March 1, 2002?
- (a)Thursday
- (b)Friday
- (c)Saturday
- (d)Sunday
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Official answer(b) Friday
Selene-1, the lunar orbiter mission belongs to which one of the following?
- (a)China
- (b)European Union
- (c)Japan
- (d)USA
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Official answer(c) Japan
From which one of the following did India buy the Barak anti-missile defence systems?
- (a)Israel
- (b)France
- (c)Russia
- (d)USA
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Official answer(a) Israel
In which one of the following kinds of organisms is the phenomenon found wherein the female kills the male after copulation?
- (a)Dragonfly
- (b)Honeybee
- (c)Spider
- (d)Pit viper
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Official answer(c) Spider
Which one of the following is an insectivorous plant?
- (a)Passion flower plant
- (b)Pitcher plant
- (c)Night queen
- (d)Flame of the forest
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Official answer(b) Pitcher plant
ISRO successfully conducted a rocket test using cryogenic engines in the year 2007. Where is the test-stand used for the purpose, located?
- (a)Balasore
- (b)Thiruvananthapuram
- (c)Mahendragiri
- (d)Karwar
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Official answer(c) Mahendragiri
What is the pH level of blood of a normal person?
- (a)4·5 – 4·6
- (b)6·45 – 6·55
- (c)7·35 – 7·45
- (d)8·25 – 8·35
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Official answer(c) 7·35 – 7·45
Norman Ernest Borlaug who is regarded as the father of the Green Revolution in India is from which country?
- (a)United States of America
- (b)Mexico
- (c)Australia
- (d)New Zealand
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Official answer(a) United States of America
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?
- (a)1 only
- (b)2 only
- (c)Both 1 and 2
- (d)Neither 1 nor 2
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Official answer(c) Both 1 and 2
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:
- (a)2 and 3 only
- (b)3 only
- (c)2 only
- (d)1 only
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Official answer(b) 3 only
What is Agent Orange?
- (a)An ace spying group trained by the Police in London
- (b)A weed-killing chemical used by the US Military in the Vietnam War
- (c)A technique used in the advanced railway safety procedure
- (d)A special chemical used in making alloy steel
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Official answer(b) A weed-killing chemical used by the US Military in the Vietnam War
Who among the following discovered heavy water?
- (a)Heinrich Hertz
- (b)H. C. Urey
- (c)G. Mendel
- (d)Joseph Priestley
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Official answer(b) H. C. Urey
In order of their distances from the Sun, which of the following planets lie between Mars and Uranus?
- (a)Earth and Jupiter
- (b)Jupiter and Saturn
- (c)Saturn and Earth
- (d)Saturn and Neptune
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Official answer(b) Jupiter and Saturn
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?
- (a)Germany
- (b)Canada
- (c)Japan
- (d)USA
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Official answer(c) Japan
Which one of the following is a spacecraft?
- (a)Apophis
- (b)Cassini
- (c)Spitzer
- (d)TechSar
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Official answer(b) Cassini
In which one of the following locations is the International Thermonuclear Experimental Reactor (ITER) project to be built?
- (a)Northern Spain
- (b)Southern France
- (c)Eastern Germany
- (d)Southern Italy
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Official answer(b) Southern France
What is the purpose of the US Space Agency's Themis Mission, which was recently in the news?
- (a)To study the possibility of life on Mars
- (b)To study the satellites of Saturn
- (c)To study the colourful display of high latitude skies
- (d)To build a space laboratory to study the stellar explosions
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Official answer(c) To study the colourful display of high latitude skies
Where was the first desalination plant in India to produce one lakh litres freshwater per day based on low temperature thermal desalination principle commissioned?
- (a)Kavaratti
- (b)Port Blair
- (c)Mangalore
- (d)Valsad
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Official answer(a) Kavaratti