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OPSC OAS Prelims Paper 1 Mock Test - 1 - OPSC OCS (Odisha) MCQ


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30 Questions MCQ Test - OPSC OAS Prelims Paper 1 Mock Test - 1

OPSC OAS Prelims Paper 1 Mock Test - 1 for OPSC OCS (Odisha) 2024 is part of OPSC OCS (Odisha) preparation. The OPSC OAS Prelims Paper 1 Mock Test - 1 questions and answers have been prepared according to the OPSC OCS (Odisha) exam syllabus.The OPSC OAS Prelims Paper 1 Mock Test - 1 MCQs are made for OPSC OCS (Odisha) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for OPSC OAS Prelims Paper 1 Mock Test - 1 below.
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OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 1

Which of the following statements are correct?

1. Soma was an intoxicating drink made in the Vedic period.

2. It (Soma) was a ritualistic drink.

Select the correct answer using the code given below:

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 1

Soma was a ritualistic drink. It was an intoxicating drink made since the Vedic Mandala of the Rigvedic period. There are two ways to get wine: fermentation and distillation. Fermentation was widely known in the world. Wine was procured by fermenting rice, sugarcane juice, mahuwa flowers, etc. Distillation, however, was a late comer. Some think that it was first discovered in Italy in the 12th century A.D.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 2

What significant event occurred on January 15, 1949, regarding the Indian Army?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 2

On January 15, 1949, Lieutenant General K. M. Cariappa assumed command of the Indian Army, making him the first Commander-in-Chief of the Indian Army. This date has since been commemorated as Indian Army Day, highlighting the significance of military service and the armed forces' role in the nation.

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OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 3

Which animal was recently classified as 'Vulnerable' on the IUCN Red List?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 3

The Himalayan Wolf has been newly classified as 'Vulnerable' by the IUCN Red List, indicating its population is declining due to threats like habitat loss and hunting. This classification aims to raise awareness and promote conservation efforts for this species.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 4

What theme was chosen for Indian Army Day in 2024?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 4

The theme for Indian Army Day in 2024 is "In Service of the Nation," which aligns with the Indian Army's motto, "Service Before Self." This theme emphasizes the dedication of the army to the welfare and protection of the nation, highlighting their commitment to national service over personal interests.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 5

Who was honored with the IMMA Lifetime Achievement Award?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 5

Manoj Kumar, the CMD of Vekoli, received the IMMA Lifetime Achievement Award, recognizing his contributions to the industry. Such awards celebrate individuals who have made significant impacts in their fields over their careers.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 6

What is the main goal of the World Economic Forum Annual Meeting in Davos in January 2024?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 6

The 2024 World Economic Forum Annual Meeting focuses on the theme "Rebuilding Trust." This theme reflects the need for collaboration and trust-building among nations and organizations in addressing global challenges such as climate change and misinformation.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 7

When did Wikipedia officially debut?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 7

Wikipedia debuted in 2001, founded by Jimmy Wales and Larry Sanger. It has since become one of the largest and most popular online reference sources, relying on user-generated content to provide information on countless topics.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 8

What recent development occurred regarding the Maldives' military relations with India?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 8

The Maldives formally requested that India withdraw its military personnel by March 15, 2024. This request signifies a potential shift in the Maldives' foreign policy, particularly under President Mohamed Muizzu, who has shown a pro-China stance.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 9

What notable sports achievement did Rohit Sharma accomplish recently?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 9

Rohit Sharma became the first men's player to achieve 150 T20I appearances and secure 100 wins. This milestone highlights his significant contribution to Indian cricket and his consistency in the shortest format of the game.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 10

In which year was the Asiatic Society of Bengal founded?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 10

The Asiatic Society of Bengal was founded in 1784. This institution has played a crucial role in the promotion of research and scholarship in the fields of literature, archaeology, and history in India.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 11

What is the objective of the 'Yogyasree' scheme launched in West Bengal?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 11

The 'Yogyasree' scheme aims to empower SC/ST students by providing them with resources and opportunities for better educational outcomes. It highlights the government's commitment to supporting marginalized communities in accessing quality education.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 12

Consider the following statements about Muryan empire:

1. The Arthashastra was written in this period.

2. Some officials were appointed to collect taxes from the people.

3. The spies were appointed to keep a watch on officials.

4. Chandragupta Maurya embraced Buddhism after renouncing his throne.

Choose the correct answer choosing the codes given below:

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 12
Chandragupta Maurya embraced Jainism after retiring, when he renounced his throne and material possessions to join a wandering group of Jain monks.

Enrich Your Learning:

Mauryan empire:

  • The Mauryan empire was founded by Chandragupta Maurya, more than 2300 years ago. Chandragupta was supported by a wise man named Chanakya or Kautilya. Many of Chanakya’s ideas were written down in a book called the Arthashastra. There were several cities in the empire such as Taxila, Pataliputra, Ujjain. Taxila was a gateway to the northwest, including Central Asia, while Ujjain lay on the route from north to south India. People in different parts of the empire spoke different People in different parts of the empire spoke different languages. They probably ate different kinds of food and wore different kinds of clothes as well.

  • The area around Pataliputra was under the direct control of the emperor. The officials were appointed to collect taxes from farmers, herders, craftspersons and traders, who lived in villages and towns in the area. These officials (not all) were given salaries. Messengers went to and fro and spies kept a watch on the officials and they both were supervised by the emperor. There were also the forested regions and people living in these areas were more or less independent, but may have been expected to provide elephants, timber, honey and wax to Mauryan officials.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 13

Consider the following statements about Shankara deva:

1. He was a Shaivite.

2. He composed his poems in Bengali.

3. He began the practice of setting up of Namghars.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 13
  • Shankara Deva of Assam (late fifteenth century) emphasised devotion to Vishnu, and composed poems and plays in Assamese. He began the practice of setting up Namghars or houses of recitation and prayer, a practice that continues to date. He is widely accredited with building on past cultural relics and devising new forms of music (Borgeet), theatrical performance (Ankia Naat, Bhaona), and dance (Sattriya) and literary language (Brajavali).

  • Besides, he has left an extensive literary oeuvre of trans-created scriptures (Bhagavat of Shankar deva), poetry and theological works written in Sanskrit, Assamese and Brajavali. The Bhagavatic religious movement he started, Ekasarana Dharma and also called Neo- Vaishnavite movement, influenced two medieval kingdoms –Koch and the Ahom kingdoms — and the assembly of devotees he initiated evolved into Sattras over time, which continue to be important socio-religious institutions in Assam and to a lesser extend in North Bengal.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 14

Consider the following statements about Tantric practices during Medieval India:

1. Tantric practices were open to women and men, and practitioners often ignored differences of caste and class within the ritual context.

2. Those engaged in Tantric practices frequently ignored the authority of the Vedas.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 14
  • Often associated with the goddess were forms of worship that were classified as Tantric. Tantric practices were widespread in several parts of the sub-continent – they were open to women and men, and practitioners often ignored differences of caste and class within the ritual context.

  • Many of these ideas influenced Shaivism, as well as Buddhism, especially in the eastern, northern and southern parts of the sub- continent.

  • Those engaged in Tantric practices frequently ignored the authority of the Vedas. Also, devotees often tended to project their chosen deity, either Vishnu or Shiva, as supreme. Relations with other traditions, such as Buddhism or Jainism, were also often fraught with tension, if not open conflict.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 15

With respect to Mauryan art and architecture, consider the following statements:

1. The Barabar caves were a gift to the Ajivika sect by Ashoka and his son Dashratha.

2. The Sanchi stupa was originally builtv from stone.

3. The top of the Ashokan pillars display only lion motifs.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 15
The famous Sanchi stupa, with its massive dimensions was originally built with bricks and was later enlarged after the time of Asoka. The pillars erected by Asoka furnish the finest specimen of the Mauryan art. Ashokan pillars, with inscriptions, were found in places like Delhi, Allahabad, Rummindai, Sanchi and Sarnath. Their tops are crowned with figures of animals, like lion, elephant and bull.
OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 16

Consider the following pairs:

Which of the pairs given above is/are correctly matched?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 16

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 17

Consider the following pairs:

1. Lal Ded: Vaishanavite

2. Akka Mahadevi: Shaivite

3. Andal: Shaivite

Which of the pairs given above is/are correctly matched?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 17

Women saints played an important role in the Bhakti Movement. Some of the prominent women saints were:

(1) Lal Ded: Born in modern-day Kashmir, 14th-century Kashmiri saint and mystic poet Lal Ded (Mother Lalla), also known as Lalla or Lalleshwari, was married at the age of 12 into a family that was reported to have regularly mistreated her. After becoming a disciple of Sidh Srikanth, she renounced her material life and marriage to become a devotee of the god Shiva. As a mystic, she wandered naked, reciting her proverbs and quatrain-based poems. Lal Ded often used her poetry as a peaceful means of engagement with both Shaivism and Sufism.

(2) Andal: She in the only femal Alvar among the 12 Alvar saints of South India. The Alvar saints are known for their affiliation to the Vaishavite tradition of Hinduism. Andal is accredited great Tamil works, Thiruppavai and Nachiar Tirumozhi, which are still recited by devotees during the winter festival season of Margazhi.

(3) Akka Mahadevi: Akka Mahadevi was one of the early female poets of Kannada language and a prominent personality in the Lingayat Sect of Hinduism. She composed Vachanas and two short writings, called Mantrogopya and the Yoganagatrividhi in Kannada. She is known to have considered the Shiva as her husband.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 18

With reference to the Round table conferences, consider the following statements:

  1. B R Ambedkar attended only the first and second Round Table conference.

  2. The differences between Congress and Ambedkar in the Second Round Table conference led to Poona Pact.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 18
  • Statement 1 is incorrect: B R Ambedkar attended all the three round table conferences.

  • Statement 2 is correct: The differences between Gandhi, representing Congress and Dr. B R Ambedkar, representing depressed class, regarding separate electorate for untouchables led to Poona Pact in 1932.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 19

‘Direct Action Day’ on 16th Aug, 1946 was related to which of the following?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 19
The League in July withdrew its earlier acceptance of the long-term plan and calling on the Muslim Nation to go in for Direct Action from 16 August to achieve Pakistan.
  • After withdrawing its support to the Cabinet Mission plan, the Muslim League decided on “Direct Action” for winning its Pakistan demand.

  • It announced 16 August 1946 as “Direct Action Day”. On this day, riots broke out in Calcutta, lasting several days and leaving several thousand people dead. By March 1947 violence spread to many parts of northern India.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 20

Which of the following trio of Indian nationalist leaders was known as ‘Lal-Bal-Pal’?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 20
The Indian National Congress had branches in most major cities and towns. Through the Swadeshi movement of 1905-07 it had greatly broadened its appeal among the middle classes.

The Swadeshi Movement had thrown up some towering leaders – among them Bal Gangadhar Tilak of Maharashtra, Bipin Chandra Pal of Bengal, and Lala Lajpat Rai of Punjab. The three were known as “Lal, Bal and Pal”, the alliteration conveying the all-India character of their struggle, since their native provinces were very distant from one another. These leaders advocated militant opposition to colonial rule.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 21

He was an Indian political leader and social reformer. He belonged to the moderate faction of Indian National Congress. He was also the founder of the Servants of India Society. He was also the mentor of Mahatma Gandhi. He was?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 21
  • Pherozshah Mehta - was a Parsi politician and lawyer from Bombay. He was knighted by the British Government in India for his service to the law. He was one of the founding members and President of the Indian National Congress in 1890. He started The Bombay Chronicle, an English-language weekly newspaper

  • Dadabhai Naroji - also known as the "Grand Old Man of India" and "Unofficial Ambassador of India" was a British Parsi scholar, trader and politician who was a Liberal Party Member of Parliament (MP) in the United Kingdom House of Commons and the first Indian to be a British MP. He was one of the founding members of the Indian National Congress.

  • A O Hume - was a member of the Imperial Civil Service, a political reformer, ornithologist and botanist who worked in British India. He was one of the founders of the Indian National Congress.

  • Gopal Krishna Gokhale - was a political leader and social reformer. He was a senior leader of the INC and the founder of the Servants of India Society. He belonged to the moderate faction of INC. Gokhale's mentor was Justice M.G. Ranade, who started the Sarvajanik Sabha Journal. Gokhale was the mentor to Mahatma Gandhi and he was the one who suggested Gandhi to tour India after his return in 1915.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 22

With reference to the ‘Rowlatt Satyagraha’, consider the following statements:

  1. It was against the press censorship applied during the First World War.

  2. It was most intense in the Punjab region.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 22
  • Statement 1 is incorrect: During the Great War of 1914-18, the British had instituted censorship of the press and permitted detention without trial. Now, on the recommendation of a committee chaired by Sir Sidney Rowlatt, these tough measures were continued. In response, Gandhiji called for a countrywide campaign against the “Rowlatt Act”.

  • Statement 2 is correct: In towns across North and West India, life came to a standstill, as shops shut down and schools closed in response to the bandh call. The protests were particularly intense in the Punjab, where many men had served on the British side in the War – expecting to be rewarded for their service. Instead they were given the Rowlatt Act. Gandhiji was detained while proceeding to the Punjab, even as prominent local Congressmen were arrested. It was the Rowlatt satyagraha that made Mahatma Gandhi a truly national leader. Emboldened by its success, Gandhiji called for a campaign of “non-cooperation” with British rule.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 23

Who amongst the following were the members of Interim Government in 1946?

  1. Liaquat Ali Khan

  2. C H Bhabha

  3. Somnath Lahiri

  4. I. I. Chundrigar

Select the correct answer from the code given below.

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 23
While the Constituent Assembly deliberated on the Constitution, there was an interim administration in place. The members of Interim government included - Baldev Singh, John Mathai, C Rajagopalachari, Jawaharlal Nehru, Liaquat Ali Khan, Vallabhbhai Patel, I.I.

Chundrigar, Asaf Ali, C H Bhabha, Jagjivan Ram, Ghasanfar Ali Khan, Rajendra Prasad, Abdur Nishar. Somnath Lahiri was a communist who criticised the Interim Government due to British involvement in it.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 24

Consider the following statements:

  1. For Mahatma Gandhi the National Movement was not just a fight for independence but also a way of social transformation.

  2. Mahatma Gandhi saw the charkha as a symbol of a human society that would not glorify machines and technology.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 24
  • Statement 1 is correct: Mahatma Gandhi focused on social reform works when he was not in politics. A very good example is, when Congress declared Purna Swaraj in Lahore session (1930), and hoisted the National flag, Gandhiji wanted that the declaration of Purna Swaraj be made by whole villages and towns, and the rest of the day be spent in service of untouchables. Also, during Dandi March he said to the upper castes that if they want Swaraj, they need to correct the wrongs done by them on untouchables. Hence, he used the National movement to bring social transformation.

  • Statement 2 is correct: Mahatma Gandhi was profoundly critical of the modern age in which machines enslaved humans and displaced labour. He saw the charkha as a symbol of a human society that would not glorify machines and technology

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 25

With reference to the Khilafat movement, consider the following statements:

  1. It was led by Muhammad Ali and Shaukat Ali.

  2. It was started to support the Ottoman empire.

  3. It was supported by the Congress party.

Which of the statements given above is/are correct?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 25
  • Statement 1 is correct: The Khilafat Movement, (1919-1920) was a movement of Indian Muslims, led by Muhammad Ali and Shaukat Ali that demanded the following:

  • Statement 2 is incorrect: The Turkish Sultan or Khalifa must retain control over the Muslim sacred places in the erstwhile Ottoman Empire; the jazirat-ul-Arab (Arabia, Syria, Iraq, Palestine) must remain under Muslim sovereignty; and the Khalifa must be left with sufficient territory to enable him to defend the Islamic faith.

  • Statement 3 is also correct: The Congress supported the movement and Mahatma Gandhi sought to conjoin it to the Non-cooperation Movement.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 26

Which of the following is/are warm ocean currents?

  1. Canary current

  2. Mozambique current

  3. North Equatorial Current

Select the correct answer using the code given below.

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 26
  • The Canary Current (cold) is a wind-driven surface current that is part of the North Atlantic Gyre. This eastern boundary current branches south from the North Atlantic Current and flows southwest about as far as Senegal where it turns west and later joins the Atlantic North Equatorial Current. Hence option 1 is not correct.

  • The Mozambique Current is an ocean current in the Indian Ocean, usually defined as warm surface waters flowing south along the African east coast in the Mozambique Channel, between Mozambique and the island of Madagascar. Hence option 2 is correct.

  • The North Equatorial Current (warm) is found in the North Atlantic from about 7°N to about 20°N. Fortified by the Atlantic trade wind belt, the NEC is a broad westward flowing current that forms the southern limb of the North Atlantic subtropical gyre. The current originates from the northwestern coast of Africa, where it is fed mainly by the cooler waters flowing from the northeast Atlantic. Hence option 3 is correct.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 27

In the neighbourhood of the Aleutian Islands in the Pacific Ocean and between Greenland and Iceland in the Atlantic Ocean low-pressure centres are found due to which pressure belt?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 27
  • Sub-Polar low-pressure belt is located between 60-65 degree latitudes in both the hemispheres. The low-pressure belt does not appear to be thermally induced because there is low temperature throughout the year. The surface air spreads outward from this zone due to the rotation of the earth and low pressure is caused. Instead of a regular and continuous belt, there are well-defined low-pressure centres or cells over the oceans in the northern hemisphere e.g. in the neighbourhood of the Aleutian Islands in the Pacific Ocean and between Greenland and Iceland in the Atlantic Ocean. Hence option (c) is the correct answer.

  • The sub-tropical highs extend from near the tropics to about 35°N and S. After saturation (complete loss of moisture) at the Intertropical Convergence Zone (ITCZ), the air moving away from equatorial low pressure belt in the upper troposphere becomes dry and cold. This dry and cold wind subsides at 30°N and S. So the high pressure along this belt is due to subsidence of air coming from the equatorial region which descends after becoming heavy.

  • Equatorial Low Pressure Belt lies between 10°N and 10°S latitudes. This belt is the zone of convergence of trade winds from two hemispheres from sub-tropical high pressure belts. As this region lies along the equator, it receives highest amount of insolation. Due to intense heating, air gets warmed up and rises over the equatorial region (convection).Whenever there is vertically upward movement of air, the region at the surface will be at low pressure. Thus the belt along the equator is called equatorial low pressure belt.

  • The polar highs are small in area and extend around the poles. They lie around poles between 80 – 90° N and S latitudes. The air from sub-polar low pressure belts after saturation becomes dry. This dry air becomes cold while moving towards poles through upper troposphere. The cold air (heavy) on reaching poles subsides creating a high pressure belt at the surface of earth.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 28

Consider the following:

  1. Dal lake

  2. Wular lake

  3. Pangong Tso lake

  4. Loktak lake

Which of the lakes given above are freshwater lakes?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 28
  • Dal is a freshwater lake in Srinagar. Hence option 1 is correct.

    • It is also an important source for commercial operations in fishing and water plant harvesting.

    • The floating gardens, known as “Raad” in Kashmiri, blossom with lotus flowers during July and August in this lake. o It is integral to tourism and recreation in Kashmir and is named the “Jewel in the crown of Kashmir” or “Srinagar’s Jewel”.

  • Wular Lake is the largest freshwater lake in India and lies in the Kashmir Valley, 40 km northwest of Srinagar City. Hence option 2 is correct.

  • Pangong Tso lake is located in the Union Territory of Ladakh. It is situated at a height of almost 4,350m and is the world’s highest saltwater lake. Hence option 3 is not correct.

    • It acts as a huge absorption basin for annual floodwater in Kashmir Valley.

    • The Jhelum river flows into it, 40 km down from Srinagar, and then out again.

    • Lake basin is formed by the tectonic activity and is fed by the Jhelum river.

    • Extending to almost 160 km, one-third of the Pangong Lake lies in India and the other two-thirds in China.

  • Loktak Lake is the largest freshwater lake in North East India. Hence option 4 is correct.

    • Loktak Lake is fed by the Manipur river and several tributaries and ‘Ungamel Channel’ (Ithai Barrage) is its only outlet now.

    • Keibul Lamjao national park- the only floating national park in the world lies in the lake.

    • The national park is the last habitat of endangered Sangai deer also called as dancing deer.

    • The lake is famous for Phumdis- floating mass of entangled vegetation formed by the accumulation of organic debris and biomass with soil.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 29

Tropical Cyclones are violent storms that originate over oceans in tropical areas. In this context, consider the following conditions:

  1. sea surface temperature higher than 27° celsius.

  2. absence of coriolis force.

  3. high variations in the vertical wind speed.

Which of the above condition is/are favorable for the formation of tropical cyclones?

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 29
  • Tropical cyclones originate and intensify over warm tropical oceans. The conditions favourable for the formation and intensification of tropical storms are:

    • Large sea surface with a temperature higher than 27° C; Hence option 1 is correct.

    • Presence of the Coriolis force Hence option 2 is not correct.

    • Small variations in the vertical wind speed; Hence option 3 is not correct.

    • A pre-existing weak low-pressure area or low-level-cyclonic circulation.

    • Upper divergence above the sea level system.

  • The cyclones, which cross 20°N latitude generally, recurve and they are more destructive (cyclones do not form near the equator due to the absence of Coriolis force).

  • A mature tropical cyclone is characterized by the strong spirally circulating wind around the centre, called the eye. The diameter of the circulating system can vary between 150 and 250 km. The eye is a region of calm with subsiding air.

  • Around the eye is the eyewall, where there is a strong spiralling ascent of air to a greater height reaching the tropopause. The wind reaches maximum velocity in this region, reaching as high as 250 km per hour. Torrential rain occurs here.

  • From the eyewall, rain bands may radiate and trains of cumulus and cumulonimbus clouds may drift into the outer region. The diameter of the storm over the Bay of Bengal, the Arabian Sea and Indian ocean is between 600 and 1200 km. The system moves slowly about 300 - 500 km per day. The cyclone creates storm surges and they inundate the coastal low lands. The storm peters out on the land.

OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 30

Which of the following is/are sedimentary rocks?

  1. Coal

  2. Slate

  3. Potash

  4. Chalk

  5. Limestone

  6. Granite

Select the correct answer using code given below.

Detailed Solution for OPSC OAS Prelims Paper 1 Mock Test - 1 - Question 30
  • Rocks (igneous, sedimentary and metamorphic) of the earth’s surface are exposed to denudational agents, and are broken up into various sizes of fragments. Such fragments are transported by different exogenous agencies and deposited. These deposits through compaction turn into sedimentary rocks. This process is called lithification.

  • Depending upon the mode of formation, sedimentary rocks are classified into three major groups:

    • mechanically formed - sandstone, conglomerate, shale, loess etc. are examples;

    • organically formed - geyserite, chalk, limestone, coal etc. are some examples;

    • chemically formed - chert, limestone, halite, potash etc. are some examples. Hence option (b) is the correct answer.

  • Granite, gabbro, pegmatite, basalt, volcanic breccia and tuff are some of the examples of igneous rocks.

  • Gneissoid, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rocks.

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