14000+ MCQs World Geography (Oceanography)

14000+ MCQs World Geography (Oceanography)

Total Questions:- 50

Time:- 30 Minutes

MCQ Pattern

Date:- 05/05/2026

Name

The average salinity of oceans in the world is

35%

42%

64%

105%

None

With respect to tidal bores, a phenomena observed at mouth of river, choose the correct statement.

I. It is a wall of water that moves up certain low lying rivers due to incoming tides. II. Rivers flowing into sea, when obstructs the passage of crest of tidal waves, it forms tidal bores.
III. Narrow and low lying coastal rivers with gentle channel gradient is a favourable condition.

Only I

II and III

I and III

All of these

None

Which of the following is true regarding oceanic surface temperature?

I. The temperature of ocean’s surface decreased from poles towards equator.
II. The temperature of ocean water varies in Northern and Southern hemisphere.
III. The Isotherms are regular in the Southern hemisphere over oceanic surface.

I and II

I and III

I, II and III

II and III

None

The increase in salinity of water

increases the rate of evaporation.

decreases the rate of evaporation.

has no effect on the rate of evaporation.

increases the rate of evaporation initially but decreases later.

None

Which one among the following is not correct regarding Tsunami?

Tsunamis have a very long wavelength.

Tsunamis have a slight swell of about twelve inches above the normal sea surface.

Tsunamis grow in height when they reach shallower water.

Tides also play an important role in the generation of Tsunamis.

None

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

is found in atmosphere as moisture and clouds.

is found in freshwater lakes and rivers.

exists as groundwater.

exists as soil moisture.

None

With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct?

I. OMT is measured up to a depth of 26°C isotherm which is 129 meters in the South-Western Indian Ocean during January to March.
II. OMT collected during January to March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean.

Only I

Only II

Both I and II

Neither I nor II

None

Which one of the following pairs is not correctly matched?

Kuroshio – Warm Ocean Current

Labrador – Warm Ocean Current

Benguela – Cold Ocean Current

Oyashio – Cold Ocean Current

None

In the question given below there are two statements labelled as Assertion (A) and Reason (R). In the context of the two, which of the following is correct?

Assertion (A) Seas and Oceans are vast reservoir of food and mineral resources for future.
Reason (R) At present mankind has not been able to develop cost effective technologies for the exploitation of marine resources.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not the correct explanation of A

A is true, but R is false

A is false, but R is true

None

10.

Water with more salinity freezes at

higher temperature than normal water.

lower temperature than normal water.

same temperature as normal water.

None of the above

None

11.

The deepest zones on oceanic basins is

Abyssal plains

Trenches

Guyots

Canyons

None

12.

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 the statements given above are correct?

I and IV

II, III and IV

I, II and III

All of the above

None

13.

Ocean basin has been divided into number of types. Abyssal plain is one of them. Choose the correct statement.

I. It lies immediately after continental slope.
II. They are among flattest, smoothest surface on Earth.
III. It covers more than 50% of Earth’s surface.

I and II

I and III

II and III

All of these

None

14.

Identify the incorrect statement(s) about marine deposits.

I. Blue mud covers the largest area of ocean.
II. Green mud is found in abundance on the sea floor near the Cape of Good Hope.
III. Grey colour of Green Mud is because of mineral Glauconite.
IV. Red clay is the most widespread Pelagic deposit.

I and II

Only II

Only III

None of these

None

15.

Assertion (A) Even in the deepest trenches more than 6 miles below the surface, the water never freezes. Reason (R) Only the upper layer of ocean waters freezes and acts as an insulator for lower layers.

Both A and R are true and R is the correct explanation of A

Both A and R are true, but R is not the correct explanation of A

A is true, but R is false

A is false, but R is true

None

16.

Continental shelf is

a part of oceanic crust made of granite.

a part of continental crust made of basalt.

a part of oceanic crust made of basalt.

a part of continental crust made of granite.

None

17.

Submarine canyons are formed due to which of the following?

Rifting

Turbidity currents

Subsidence and upliftment

Ecstasy

None

18.

Which one of the following is the correct sequence of the four stages of water movement in a hydrological cycle?

Evaporation-Condensation-Precipitation-Infiltration.

Evaporation-Precipitation-Condensation-Infiltration.

Infiltration-Evaporation-Condensation-Precipitation.

Condensation-Precipitation-Evaporation-Infiltration.

None

19.

The average depth of Spanish Basin is

2000 m

6000 m

5000 m

10,000 m

None

20.

The tides whose height are 20 per cent more than normal tides are called

spring tides

neap tides

apogean and perigean tides

diurnal and semi-diurnal tides

None

21.

Which one among the following sequences of water bodies, from lower to higher salinity concentration, is correct?

Gulf of California, Baltic Sea, Red Sea, Arctic Sea.

Baltic Sea, Arctic Sea, Gulf of California, Red Sea.

Red Sea, Gulf of California, Arctic Sea, Baltic Sea.

Arctic Sea, Gulf of California, Baltic Sea, Red Sea.

None

22.

Which of the following are warm ocean currents?

Kuroshio and California Current

North Atlantic Drift and Brazil

Canaries and Benguela Current

West Wind Drift and Falkland Current

None

23.

Statement I The Kuroshio is a warm North-flowing ocean current on the Western margin of the North Pacific Ocean. Statement II Presence of a number of volcanoes at the bottom of the sea of Japan is responsible for the Kuroshio current becoming warm.

Both the statements are individually true and statement II is the correct explanation of statement I.

Both the statements are individually true but statement II is not the correct explanation of statement I.

Statement I is true but statement II is false.

Statement I is false but statement II is true.

None

24.

Which of the following currents is located near the coastline of Philippines and China?

Oyashio Current

Kuroshio Current

Canary Current

Benguela Current

None

25.

The ideal temperature for development of coral reefs is

31°C

20°C

16°C

35°C

None

26.

Which of the following statements is true regarding oceanic salinity?

It decrease from equator to poles.

It decrease from poles to equator.

It decreases from equator till subtropical latitudes and increases later.

It increases from equator till subtropical latitudes and decreases later.

None

27.

Coral reefs attached to continental coast or Islands is known as

Barrier reef

Fringing reef

Atolls

All of these

None

28.

Which one of the following type of tides is observed at an interval of every 6 months?

Spring tides

Neap tides

Tropical tides

Equinoctical spring tides

None

29.

The Carlsberg ridge emerged from which of the following latitudes?

5°S

10°N

12°S

16°S

None

30.

Surface currents in the ocean are primarily caused by

temperature differences

density differences

wind action

coriolis effect

None

31.

Which one of the following is a warm ocean current?

East Australian Current

West Australian Current

Benguela Current

Peru Current

None

32.

Assertion (A) On an average, salinity decreases from equator towards the poles in the ocean. Reason (R) The highest salinity in the oceans is observed at the equator.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not the correct explanation of A

A is true, but R is false

A is false, but R is true

None

33.

The Gulf Stream is the warm ocean current. It is moving along the East of North America up to 40°N, where it meets with Labrador current, which is cold current. This meeting of warm and cold ocean current is helping for the

navigation of ship

fishing

Both (a) and (b)

Neither (a) nor (b)

None

34.

What is the similarity between Milwaukee Deep, Java Trench and Challenger Deep?

They all are trenches in the Pacific Ocean.

They are the deepest points of the Atlantic, India and Pacific Oceans, respectively.

They all are trenches in the Indian Ocean.

They all are deeps of the Atlantic Ocean.

None

35.

The time it takes for the crests (or troughs) of two successive waves to pass a given point is known as the

wave period

wave celerity

wave form

wave height

None

36.

The Wyville Thomson ridge is located between

Iceland and Denmark

Iceland and Scotland

Greenland and Iceland

Iceland and Kurile

None

37.

Which of the following seas has the highest average salinity?

Black sea

Yellow sea

Mediterranean sea

Dead sea

None

38.

Tidal range denotes the

rise of sea water and its movement toward the coast.

fall of sea water and its movement toward the sea.

rise and fall of sea water due to gravitational forces.

difference between high and low tide.

None

39.

Pelagic zone is one of the most important division of ocean with respect to commercial exploitation. Choose the correct statement.

I. Any water in sea or lake is neither close to bottom nor near the shore can be said to be in pelagic zone.
II. Pelagic life decreases with increasing depth.
III. Demersal zone lies between benthic and pelagic zone.

Only I

II and III

I and III

All of these

None

40.

Which of the following are cold ocean currents?

I. Humboldt Current
II. Brazil Current
III. Oyashio Current
IV. Canary Current

I and II

I and III

I, III and IV

II, III and IV

None

41.

Apogean tide occurs during, which of the following conditions?

I. When Sun and Earth is at minimum distance.
II. When Moon is farthest from Earth.
III. When Moon is nearest to the Earth.
IV. When Moon is at 90° to Sun.

Only II

II and IV

I and III

None of the above

None

42.

Which of the following conditions hinders the development of corals?

Temperature of water between 20 - 21°C

Existence of submarine bench or a platform

Sediment free water

Fresh water

None

43.

Which one of the following ocean currents is not a cold ocean current?

Canary Current

California Current

Kuroshio Current

Oyashio Current

None

44.

Assertion (A) Water in an open pond remains cool even on a hot summery day. Reason (R) Water on heating evaporates and heat energy gets converted into latent heat.

Both A and R are true and R is the correct explanation of A

Both A and R are true, but R is not the correct explanation of A

A is true, but R is false

A is false, but R is true

None

45.

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

Indian Ocean is a half ocean.

Indian Ocean has monsoon drift.

Indian Ocean is a land-locked ocean.

Indian Ocean has greater variation in salinity.

None

46.

The average surface temperature of oceanic water is

35°C

27°C

42°C

13°C

None

47.

Continental shelves are formed by

deposition of marine detritus.

extension of continental platforms.

faults in continental margins.

All of the above

None

48.

Statement I Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and Sun and the rotation of the Earth. Statement II The Earth rotates from West to East.

Both the statements are individually true and statement II is the correct explanation of statement I

Both the statements are individually true, but statement II is not the correct explanation of statement I.

Statement I is true, but statement II is false.

Statement I is false, but statement II is true.

None

49.

Which of the following theories of the origin of tides is not correctly matched?

Equilibrium Theory – Newton

Canal Theory – Airy

Stationary Wave Theory – William Whewell

Dynamic Theory – Laplace

None

50.

The loss of water vapour by plants after it has been drawn from the soil is called

Evaporation

Transpiration

Evapotranspiration

Transoevaporation

None

Indian Students Exam

Welcome to No. 1 Exam Portal 2026

SSC, UPSC, RRB, NDA, AFCAT, IBPS, WBCS, UPPCS, MPPSC, BPSC, CTET, TET, Job Vacancy, GK Mock

100% Free Mock Test

Contact Us:-indianstudentsexam@gmail.com

Copyright © 2019-2025. All Rights Reserved.