Oceanography PYQs

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1. Prelims 2026Q75Oceanography

   Which of the following statements with regard to India’s Deep Ocean Mission is/are correct ?

   1.It was launched by the Ministry of Ports, Shipping and Waterways, Government of India.

   2.Matsya-6000 has been designed to carry 3 people for deep sea exploration.

   3.Samudrayaan is a project under this mission.

   Select the answer using the code given below :

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
2. Prelims 2024Q89Oceanography

   Consider the following statements :

   1.The Red Sea receives very little precipitation in any form.

   2.No water enters the Red Sea from rivers.

   Which of the statements given above is/are correct ?

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
3. Prelims 2021Q56Oceanography

   Consider the following statements :

   1.The Global Ocean Commission grants licences for seabed exploration and mining in international waters.

   2.India has received licences for seabed mineral exploration in international waters.

   3.'Rare earth minerals' are present on seafloor in international waters.

   Which of the statements given above are correct?

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
4. Prelims 2021Q58Oceanography

   Consider the following statements :

   1.In the tropical zone, the western sections of the oceans are warmer than the eastern sections owing to the influence of trade winds.

   2.In the temperate zone, westerlies make the eastern sections of oceans warmer than the western sections.

   Which of the statements given above is/are correct?

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
5. Prelims 2021Q62Oceanography

   With reference to the water on the planet Earth, consider the following statements :

   1.The amount of water in the rivers and lakes is more than the amount of groundwater.

   2.The amount of water in polar ice caps and glaciers is more than the amount of groundwater.

   Which of the statements given above is/are correct?

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
6. Prelims 2015Q14Oceanography

   What explains the eastward flow of the equatorial counter-current?

   aThe Earth's rotation on its axisbConvergence of the two equatorial currentscDifference in salinity of waterdOccurrence of the belt of calm near the equator
7. Prelims 2015Q70Oceanography

   Tides occur in the oceans and seas due to which among the following?

   1.Gravitational force of the Sun

   2.Gravitational force of the Moon

   3.Centrifugal force of the Earth

   Select the correct answer using the code given below.

   a1 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
8. Prelims 2013Q16Oceanography

   On the planet Earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion

   ais found in the atmosphere as moisture and cloudsbis found in freshwater lakes and riverscexists as groundwaterdexists as soil moisture
9. Prelims 2013Q54Oceanography

   The most important fishing grounds of the world are found in the regions where

   awarm and cold atmospheric currents meetbrivers drain out large amounts of freshwater into the seacwarm and cold oceanic currents meetdcontinental shelf is undulating
10. Prelims 2012Q45Oceanography

    Consider the following factors :

    1.Rotation of the Earth

    2.Air pressure and wind

    3.Density of ocean water

    4.Revolution of the Earth

    Which of the above factors influence the ocean currents?

    a1 and 2 onlyb1, 2 and 3c1 and 4d2, 3 and 4
11. Prelims 2010Q73Oceanography

    Consider the following statements:

    1.On the planet Earth, the fresh water available for use amounts to about less than 1% of the total water found.

    2.Of the total fresh water found on the planet Earth 95% is bound up in polar ice caps and glaciers.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
12. Prelims 2007Q46Oceanography

    Consider the following statements:

    1.The annual range of temperature is greater in the Pacific Ocean than in the Atlantic Ocean.

    2.The annual range of temperature is greater in the Northern Hemisphere than in the Southern Hemisphere.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
13. Prelims 2007Q47Oceanography

    The largest coral reef in the world is found near the coast of which one of the following countries?

    aAustraliabCubacGhanadPhilippines
14. Prelims 2006Q26Oceanography

    In which one of the following oceans is Diamantina Trench situated?

    aPacific OceanbAtlantic OceancIndian OceandArctic Ocean
15. Prelims 2004Q66Oceanography

    Which one of the following statements is not correct?

    aGulfs with narrow fronts and wider rears experience high tidesbTidal currents take place when a gulf is connected with the open sea by a narrow channelcTidal bore occurs when a tide enters the narrow and shallow estuary of a riverdThe tidal nature of the mouth of the river Hooghly is of crucial importance to Kolkata as port
16. Prelims 2002Q82OceanographyAnswer disputed

    Consider the following statements:

    1.Ocean currents are the slow surface movement of water in the ocean.

    2.Ocean currents assist in maintaining the Earth’s heat balance.

    3.Ocean currents are set in motion primarily by prevailing winds.

    4.Ocean currents are affected by the configuration of the ocean floor.

    Which of these statements are correct?

    a1 and 2b2, 3 and 4c1, 3 and 4d1, 2, 3 and 4
17. Prelims 2001Q32Oceanography

    Assertion (A): During the Neap Tides, the high tide is lower and the low tide is higher than usual. Reason (R): The Neap Tide, unlike the Spring Tide, occurs on the New Moon instead of on the Full Moon.

    aBoth A and R are individually true, and R is the correct explanation of AbBoth A and R are individually true, but R is NOT a correct explanation of AcA is true, but R is falsedA is false, but R is true
18. Prelims 2000Q12Oceanography

    Consider the following statements:

    I.Tides are of great help in navigation and fishing.

    II.High tide enables big ships to enter or leave the harbour safely.

    III.Tide prevents siltation in the harbours.

    IV.Kandla and Diamond Harbour are tidal ports.

    Which of these statements are correct?

    aI and IVbII, III and IVcI, II and IIIdI, II, III and IV
19. Prelims 2000Q14Oceanography

    Match List I with List II and select the correct answer using the codes given below the Lists:

    List I (Oceanic Trench)

    I.Aleutian

    II.Kermadec

    III.Sunda

    IV.S. Sandwich

    List II (Location)

    A) Indian Ocean

    B) North Pacific Ocean

    C) South Pacific Ocean

    D) South Atlantic Ocean

    Codes:

    aI-B, II-D, III-A, IV-CbI-B, II-C, III-A, IV-DcI-A, II-C, III-B, IV-DdI-A, II-D, III-B, IV-C
20. Prelims 1997Q30Oceanography

    Which one of the following factors is responsible for the change in the regular direction of the ocean currents in the Indian Ocean?

    aIndian Ocean is ‘half an ocean’bIndian Ocean has monsoon driftcIndian Ocean is a land-locked oceandIndian Ocean has greater variation in salinity