# UPSC IAS 2018 CSAT paper 2 solution ANSWER KEY cse civil services exam prelims 3 june 2018

UPSC IAS IPS 2018 PRELIMS CSE CIVIL SERVICES PRE PRELIMINARY EXAM CSAT PAPER 2 ANSWER KEY SOLUTION APTITUDE AND REASONING ENGLISH COMPREHENSION

Paper II- (200 marks) Duration
• Comprehension
• Interpersonal skills including communication skills;
• Logical reasoning and analytical ability
• Decision-making and problem-solving
• General mental ability
• Basic numeracy (numbers and their relations, orders of magnitude, etc.) (Class X level), Data interpretation (charts, graphs, tables, data sufficiency etc. – Class X level)

• English Language Comprehension skills (Class X level).

1. A number consists of three digits of which the middle one is zero and their sum is 4. If the number formed by interchanging the first and last digits is greater than the number itself by 198, then the difference between the first and last digits is

(a) 1

(b) 2

(c) 3

(d) 4

B

2. A solid cube of 3 cm side, painted on all its faces, is cut up into small cubes of 1 cm side. How many of the small cubes will have exactly two painted faces?

(a) 12

(b) 8

(c) 6

(d) 4

A

3. While writing all the numbers from 700 to 1000, how many numbers occur in which the digit at hundred’s place is greater than the digit at ten’s place, and the digit at ten’s place is greater than the digit at unit’s place?

(a) 61

(b) 64

(c) 85

(d) 91

4. If Pen < Pencil, Pencil < Book and Book > Cap, then which one of the following is always true?

(a) Pen > Cap

(b) Pen < Book

(c) Pencil = Cap

(d) Pencil > Cap

B

5. A bookseller sold ‘a’ number of Geography textbooks at the rate of Rs. x per book, ‘a + 2’ number of History textbooks at the rate of Rs. (x + 2) per book and ‘a – 2’ number of Mathematics textbooks at the rate of Rs. (x – 2) per book. What is his total sale in Rs. ?

(a) 3x + 3a

(b) 3ax + 8

(c) 9ax

(d) x3a3

6. A bag contains 15 red balls and 20 black balls. Each ball is numbered either 1 or 2 or 3.20 % of the red balls are numbered 1 and 40 % of them are numbered 3. Similarly, among the black balls, 45 % are numbered 2 and 30 % are numbered 3. A boy picks a ball at random. He wins if the ball is red and numbered 3 or if it is black and numbered 1 or 2. What are the chances of his winning?

(a) 1/2

(b) 4/7

(c) 5/9

(d) 12/13

7. Two persons, A and B are running on a circular track. At the start, B is ahead of A and their positions make an angle of 30° at the centre of the circle. When A reaches the point diametrically opposite to his starting point, he meets B. What is the ratio of speeds of A and B, if they are running with uniform speeds?

(a) 6: 5

(b) 4: 3

(c) 6: 1

(d) 4: 2

A

8. A student has to get 40 % marks to pass in an examination. Suppose he gets 30 marks and fails by 30 marks, then what are the maximum marks in the examination?

(a) 100

(b) 120

(c) 150

(d) 300

C

9.19 boys turn out for playing hockey. Of these, 11 are wearing hockey shirts and 14 are wearing hockey pants. There are no boys without shirts and pants. What is the number of boys wearing full uniform?

(a) 3

(b) 5

(c) 6

(d) 8

Directions for the following 6 (six) items: Read the information given below and answer the six items that follow. A, B, C and D are students. They are studying in four different cities, viz. , P, Q, R and S (not necessarily in that order). They are studying in Science college, Arts college, Commerce college and Engineering college (not necessarily in that order), which are situated in four different States, viz. , Gujarat, Rajasthan, Assam and Kerala (not necessarily in that order). Further, it is given that— (i) D is studying in Assam (ii) Arts college is located in city S which is in Rajasthan (iii) A is studying in Commerce college (iv) B is studying in city Q (v) Science college is located in Kerala 10.

A is studying in ?

(a) Rajasthan

(b) Gujarat

(c) City Q

(d) Kerala

B

11. Science college is located in

(a) city Q

(b) city S

(C) city R

(D) city P

A

12. C is studying in

(a) Science college

(b) Rajasthan

(c) Gujarat

(d) city Q

13. Which one of the following statements is correct?

(a) D is not studying in city S.

(b) A is studying in Science college.

(c) A is studying in Kerala.

(d) Engineering college is located in Gujarat.

14. Which one of the following statements is correct regarding Engineering College?

(a) C is studying there.

(b) B is studying there.

(c) It is located in Gujarat.

(d) D is studying there.

15. Which one of the following statements is correct?

(a) Engineering college is located in Assam.

(b) City Q is situated in Assam

(c) C is studying in Kerala.

(d) B is studying in Gujarat.

A

16. Consider the following three- dimensional figure

How many triangles does the above figure have?

(a) 18

(b) 20

(c) 22

(d) 24

17 Consider the following sum:

• + 1• + 2• + •3+ •1 = 21•

In the above sum,

• stands for  ?

(a) 4

(b) 5

(c) 6

(d) 8

18. Consider the following pattern of numbers:

Question Details for Question 18 8 10 15 13 6 5 7 4 4 6 8 8 6 11 16 ? What is the number at? in the above pattern?

(a) 17

(b) 19

(c) 21

(d) 23

19. How many diagonals can be drawn by joining the vertices of an octagon?

(a) 20

(b) 24

(c) 28

(d) 64

A

20. The figure drawn below gives the velocity graphs of two vehicles A and B. The straight line OKP represents the velocity of vehicle A at any instant, whereas the horizontal straight line CKD represents the velocity of vehicle B at any instant. In the figure, D is the point where perpendicular from P meets the horizontal line CKD such that PD=1/2LD Image for Q 20 of CSAT 2016 June What is the ratio between the distances covered by vehicles A and B in the time interval OL?

(a) 1: 2

(b) 2: 3

(c) 3: 4

(d) 1: 1

C

21. A grain 200 m long is moving at the rate of 40 kmph. In how many seconds will it cross a man standing near the railway line?

(a) 12

(b) 15

(c) 16

(d) 18

Directions for the following 4 (four) items: Read the following four passage’s and answer the items that follow. Your answers to these items should be based on the passages only. Passage-1 Global population was around 1.6 billion in 1990—today it is around 7.2 billion and growing. Recent estimates on population growth predict a global population of 9.6 billion in 2050 and 10.9 billion in 2100. Unlike Europe and North America, where only three to four per cent of population is engaged in agriculture, around 47 per cent of India’s population is dependent upon agriculture. Even if India continues to do well in the service sector and the manufacturing sector picks up, it is expected that around 2030 when India overtakes China as the world’s most populous country, nearly 42 per cent of India’s population will still be predominantly dependent on agriculture.

22. Which of the following is the most logical and rational inference that can be made from the above passage?

(a) Prosperity of agriculture sector is of critical importance to India.

(b) Indian economy greatly depends on its agriculture.

(c) India should take strict measures to control its rapid population growth. (d) India’s farming communities should switch over to other occupations to improve their economic conditions.

Passage-2

Many pathogens that cause foodborne illnesses are unknown. Food contamination can occur at any stage from farm to plate. Since most cases of food poisoning go unreported, the true extent of global foodborne illnesses is unknown. Improvements in international monitoring have led to greater public awareness, yet the rapid globalization of food production increases consumers’ vulnerability by making food harder to regulate and trace. “We have the world on our plates”, says an official of WHO.

23. Which of the following is the most logical corollary to the above passage? (a) With more options for food come more risks.

(b) Food processing is the source of all foodborne illnesses.

(c) We should depend on locally produced food only.

(d) Globalization of food production should be curtailed.

Passage-3

I am a scientist, privileged to be somebody who tries to understand nature using the tools of science. But it is also clear that there are some really important questions that science cannot really answer, such as: Why is there something instead of nothing? Why are we here? In those domains, I have found that faith provides a better path to answers. I find it oddly anachronistic that in today’s culture there seems to be a widespread presumption that scientific and spiritual views are incompatible.

24. Which of the following is the most logical and rational inference that can be made from the above passage?

(a) It is the faith and not science that can finally solve all the problems of mankind.

(b) Science and faith can be mutually complementary if their proper domains are understood.

(c) There are some very fundamental questions which cannot be answered by either science or faith.

(d) In today’s culture, scientific views are given more importance than spiritual views.

Passage-4

Though I have discarded much of past tradition and custom, and am anxious that India should rid herself of all shackles that bind and contain her and divide her people, and suppress vast numbers of them, and prevent the free development of the body and the spirit; though I seek all this, yet I do not wish to cut myself off from that past completely. I am proud of that great inheritance that has been and is, ours and I am conscious that I too, like all of us, am a link in that unbroken chain which goes back to the dawn of history in the immemorial past of India.

25. The author wants India to rid herself of certain past bonds because

(a) he is not able to see the relevance of the past

(b) there is not much to be proud of

(c) he is not interested in the history of India

(d) they obstruct her physical and spiritual growth

Directions for the following 8 (eight) items Read the following eight passages and answer the items that follow. Your answers to these items should be based on the passages only.

Passage-1

All actions to address climate change ultimately involve costs. Funding is vital in order for countries like India to design and implement adaptation and mitigation plans and projects. The problem is more severe for developing countries like India, which would be one of the hardest hit by climate change, given its need to finance development. Most countries do indeed treat climate change as real threat and are striving to address it in a more comprehensive and integrated manner with the limited resources at their disposal.

26. With reference to the above passage, the following assumptions have been made:

1. Climate change is not a challenge for developed countries.

2. Climate change is a complex policy issue and also a development issue for many countries.

3. Ways and means of finance must be fount to enable developing countries to enhance their adaptive capacity. Which of the above assumptions is/are valid?

(a) 1 and 2 only

(b) 3 only

(c) 2 and 3 only

(d) 1, 2 and 3

Passage-2

Cooking with biomass and coal in India is now recognized to cause major health problems, with women and children in poor populations facing the greatest risk. There are more than 10 lakh premature deaths each year from household air pollution due to polluting cooking fuels with another 1.5 lakh due to their contribution to general outdoor air pollution in the country. Although the fraction of the Indian population using clean cooking fuels, such as LPG, natural gas and electricity, is slowly rising, the number using polluting solid fuels as their primary cooking fuel has remained static for nearly 30 years at about 70 crore.

27. Which of the following is the most crucial and logical inference that can be made from the above passage?

(a) Rural people are giving up the use of polluting solid fuels due to their increasing awareness of health hazards.

(b) Subsidizing the use of clean cooking fuels will solve the problem of India’s indoor air pollution.

(c) India should increase its import of natural gas and produce more electricity.

(d) Access to cooking gas can reduce premature deaths in poor households.

Passage-3

Scientific knowledge has its dangers, but so has every great thing. Over and beyond the dangers with which it threatens the present, it opens up as nothing else can, the vision of a possible happy world; a world without poverty, without war, with little illness. Science, whatever unpleasant consequences it may have by the way, is in its very nature a liberator.

28. Which one of the following is the most important implication of the passage?

(a) A happy world is a dream of science.

(b) Science only can build a happy world, but it is also the only major threat. (c) A happy world is not possible without science.

(d) A happy world is not at all possible with or without science.

Passage-4

The Arctic’s vast reserves of fossil fuel, fish and minerals are now accessible for a longer period in a year. But unlike Antarctica, which is protected from exploitation by the Antarctic Treaty framed during the Cold War and is not subject to territorial claims by any country, there is no legal regime protecting the Arctic from industrialization, especially at a time when the world craves for more and more resources. The distinct possibility of ice-free summer has prompted countries with Arctic coastline to scramble for great chunks of the melting ocean.

29. Which one of the following is the most importakt implication of the passage?

(a) India can have territorial claims in the Arctic territory and free access to its resources.

(b) Melting of summer ice in the Arctic leads to changes in the geopolitics.

(c) The Arctic region will solve the world’s future problem of resource crunch. (d) The Arctic region has more resources than Antarctica.

Passage-5

Being a member of the WTO, India is bound by the agreements that have been signed and ratified by its members, including itself. According to Article 6 of the Agriculture Agreement, providing minimum support prices for agricultural products is considered distorting and is subject to limits. The subsidy arising from ‘minimal supports’ cannot exceed 10 per cent of the value of agricultural production for developing countries. PDS in India entails minimum support prices and public stockholding of food grains. It is possible that, in some years, the subsidy to producers will exceed 10 per cent of the value of agricultural production.

30. What is the crucial message conveyed by the above passage?

(a) India should revise its PDS.

(b) India should not be a member of WTO.

(c) For India, food security collides with trade.

(d) India provides food security to its poor.

Passage-6

India’s educational system is modelled on the mass education system that developed in the 19th century in Europe and later spread around the world. The goal of the system is to condition children as ‘good’ citizens and productive workers. This suited the industrial age that needed the constant supply of a compliant workforce with a narrow set of capabilities. Our educational institutes resemble factories with bells, uniforms, and batch processing of learners, designed to get learners to conform. But, from an economic point of view, the environment today is very different. It is a complex, volatile and globally interconnected world.

31. With reference to the above passage, the following assumptions have been made:

1. India continues to be a developing country essentially due to its faulty education system.

2. Today’s learners need to acquire new-age skill-sets.

3. A good number of Indians go to some developed countries for education because the educational systems there are a perfect reflection of the societies in which they function. Which of the above assumptions is/are valid?

(a) 1 and 3 only

(b) 2 only

(c) 2 and 3 only

(d) 1, 2 and 3

Passage-7

The practice of dieting has become an epidemic; everyone is looking out for a way to attain that perfect body. We are all different with respect to our ethnicity, genetics, family history, gender, age, physical and mental and spiritual health status, lifestyles and preferences. Thereby we also differ in what foods we tolerate or are sensitive to. So we really cannot reduce so many complexities into one diet or diet book. This explains the failure of diets across the world in curbing obesity. Unless the reasons for weight gain are well understood and addressed and unless habits are changed permanently, no diet is likely to succeed.

32. What is the most logical and rational inference that can be made from the above passage?

(a) Obesity has become an epidemic all over the world.

(b) A lot of people are obsessed with attaining a perfect body.

(c) Obesity is essentially an incurable disease.

(d) There is no perfect diet or one solution for obesity.

D

Passage-8

Monoculture carries great risks. A single disease or pest can wipe out swathes of the world’s food production, an alarming prospect given that its growing and wealthier population will eat 70 % more by 2050. The risks are magnified by the changing climate. As the planet warms and monsoon rains intensify, farmlands in Asia will flood. North America will suffer more intense droughts, and crop diseases will spread to new latitudes.

33. Which of the following is the most logical, rational and crucial message given by the passage?

(a) Preserving crop genetic diversity is an insurance against the effects of climate change.

(b) Despite great risks, monoculture is the only way to ensure food security in the world.

(c) More and more genetically modified crops only can save the world from impending shortages of food.

(d) Asia and North America will be worst sufferers from climate change and the consequent shortage of food.

34. A shopkeeper sells an article at Rs. 40 and gets X % profit. However, when he sells it at Rs. 20, he faces same percentage of loss. What is the original cost of the article?

(a) Rs. 10

(b) Rs. 20

(c) Rs. 30

(d) Rs. 40

35. There are 24 equally spaced points lying on the circumference of a circle. What is the maximum number of equilateral triangles that can be drawn by taking sets of three points as the vertices?

(a) 4

(b) 6

(c) 8

(d) 12

36. Consider the sequence given below: 4/12/95, 1/1/96, 29/1/96, 26/2/96, …. What is the next term of the series?

(a) 24/3/96

(b) 25/3/96

(c) 26/3/96

(d) 27/3/96

37. Twelve equal squares are placed to fit in a rectangle of diagonal 5 cm. There are three rows containing four squares each. No gaps are left between adjacent squares. What is the areg of each square?

(a) 5/7 sq cm

(b) 7/5 sq cm

(c) 1 sq cm

(d) 25/12 sq cm

38. If LSJXVC is the code for MUMBAI, the code for DELHI is

(a) CCIDD

(b) CDKGH

(c) CCJFG

(d) CCIFE

39. If RAMON is written as 12345 and DINESH as 675849, then HAMAM will be written as

(a) 92233

(b) 92323

(c) 93322

(d) 93232

40. If X is between -3 and -1, and Y is between -1 and 1, then X2 – Y2 is in between which of the following?

(a) -9 and 1

(b) -9 and -1

(c. ) 0 and 8

(d) 0 and 9

41. X and Y are natural numbers other than 1, and Y is greater than X. Which of the following represents the largest number?

(a) XY

(b) XY

(c) YX

(d) X+YXY

Directions: Read the following information and answer the two items that follow: The plan of an office block for six officers A, B, C, D, E and F is as follows: Both B and C occupy offices to the right of the corridor (as one enters the office block) and A occupies on the left of the corridor. E and F occupy offices on opposite sides of the corridor but their offices do not face each other. Offices of C and D face each other. E does not have a corner office. F’s office is further down the corridor than A’s, but on the same side.

42. If E sits in his office and faces the corridor, whose office is to his left?

(a) A

(b) B

(c) C

(d) D

C

43. Who is/are Ps immediate neighbour/neighbours? (a) A only

(b) A and D

(c) C only

(d) B and C

A

Directions for the following 7 (seven) items: Read the following four passages and answer the items that follow. Your answers to these items should be based on the passages only.

Passage-1

‘Desertification’ is a term used to explain a process of decline in the biological productivity of an ecosystem, leading to total loss of productivity. While this phenomenon is often linked to the arid, semi-arid and sub-humid ecosystems, even in the humid tropics, the impact could be most dramatic. Impoverishment of human-impacted terrestrial ecosystems may exhibit itself in a variety of ways: accelerated erosion as in the mountain regions of the country, salinization of land as in tht semi-arid and arid ‘green revolution’ areas of the country, e. g. , Haryana and western Uttar Pradesh, and site quality decline—a common phenomenon due to general decline in tree cover and monotonous monoculture of rice/wheat across the Indian plains. A major consequence of deforestation is that it relates to adverse alterations in the hydrology and related soil and nutrient losses. The consequences of deforestation invariably arise out of site degradation through erosive losses. Tropical Asia, Africa and South America have the highest levels of erosion. The already high rates for the tropics are increasing at an alarming rate (e. g. , through the major river systems—Ganga and Brahmaputra, in the Indian context), due to deforestation and ill-suited land management practices subsequent to forest clearing. In the mountain context, the declining moisture retention of the mountain soils, drying up of the underground springs and smaller rivers in the Himalayan region could be attributed to drastic changes in the forest cover. An indirect consequence is drastic alteration in the upland-lowland interaction, mediated through water. The current concern the tea planter of Assam has is about the damage to tea plantations due to frequent inundation along the flood-plains of Brahmaputra, and the damage to tea plantation and the consequent loss in tea productivity is due to rising level of the river bottom because of siltation and the changing course of the river system. The ultimate consequences of site desertification are soil degradation, alteration in available water and its quality, and the consequent decline in food, fodder and fuel-wood yields essential for the economic well-being of rural communities.

44. According to the passage, which of the following are the consequences of decline in forest cover? 1. Loss of topsoil

2. Loss of smaller rivers 3. Adverse effect on agricultural production 4. Declining of groundwater Select the correct answer using the code given below. (a) 1, 2 and 3 only

(b) 2, 3 and 4 only

(c) 1 and 4 only

(d) 1, 2, 3 and 4

D

45. Which of the following is/are the correct inference/inferences that can be made from the passage?

1. Deforestation can cause changes in the course of rivers.

2. Salinization of land takes place due to human activities only.

3. Intense monoculture practice in plains is a major reason for desertification in Tropical Asia, Africa and South America.

Select the correct answer using the code given below.

(a) 1 only

(b) 1 and 2 only

(c) 2 and 3 only

(d) None of the above

A

46. With reference to ‘desertification’, as described in the passage, the following assumptions have been made:

1. Desertification is a phenomenon in tropical areas only.

2. Deforestation invariably leads to floods and desertification.

Which of the above assumptions is/are valid?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

B

Passage-2

A diversity of natural assets will be needed to cope with climate change and ensure productive agriculture, forestry, and fisheries. For example, crop varieties are needed that perform well under drought, heat, and enhanced CO2. But the private-sector and farmer-led process of choosing crops favours homogeneity adapted to past or current conditions, not varieties capable of producing consistently high yields in warmer, wetter, or drier conditions. Accelerated breeding programmes are needed to conserve a wider pool of genetic resources of existing crops, breeds, and their wild relatives. Relatively intact ecosystems, such as forested catchments, mangroves, wetlands, can buffer the impacts of climate change. Under a changing climate, these ecosystems are themselves at risk, and management approaches will need to be more proactive and adaptive. Connections between natural areas, such as migration corridors, may be needed to facilitate species movements to keep up with the change in climate.

47. With reference to the above passage, which of the following would assist us in coping with the climate change?

1. Conservation of natural water sources

2. Conservation of wider gene pool

3. Existing crop management practices 4. Migration corridors Select the correct answer using the code given below.

(a) 1, 2, and 3 only

(b) 1, 2, and 4 only

(c) 3 and 4 only

(d) 1, 2, 3, and 4

B

48. With reference to the above passage, the following assumptions have been made:

1. Diversification of livelihoods acts as a coping strategy for climate change.

2. Adoption of mono-cropping practice leads to the extinction of plant varieties and their wild relatives.

Which of the above assumptions is/are valid?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

B

Passage-3

Today, the top environmental challenge is a combination of people and their aspirations. If the aspirations are more like the frugal ones we had after the Second World War, a lot more is possible than if we view the planet as a giant shopping mall. We need to get beyond the fascination with glitter and understand that the planet works as a biological system.

49. Which of the following is the most crucial and logical inference that can be made from the above passage?

(a) The Earth can meet only the basic needs of humans for food, clothing and shelter.

(b) The only way to meet environmental challenge is to limit human population.

(c) Reducing our consumerism is very much in our own interest.

(d) Knowledge of biological systems can only help us save this planet.

C

Passage-4

Some people believe that leadership is a quality which you have at birth or not at all. This theory is false, for the art of leadership can be acquired and can indeed be taught. This discovery is made in time of war and the results achieved can surprise even the instructors. Faced with the alternatives of going left or right, every soldier soon grasps that a prompt decision either way is better than an endless discussion. A firm choice of direction has an even chance of being right while to do nothing will be almost certainly wrong.

50. The author of the passage holds the view that

(a) leadership can be taught through war experience only

(b) leadership can be acquired as well as taught

(c) the results of training show that more people acquire leadership than are expected

(d) despite rigorous instruction, very few leaders are produced

B