F8502926Oceanography

8/4/2019 F8502926Oceanography

1/26

Wizard (Geo-Opt) Oceanography

OCEAN BOTTOM RELIEF1. Which one of the following is not a

continental island?

a. British isles

b. Belearic islandsc. Canary islands

d. Madagaskare. c

2. Continental platform includes:

a. Continent, continental shelf andcontinental rise

b. Continental shelf, continental slope,

continental rise

c. Continent, continental sloped. Continent, continental shelf

e. d3. Consider the following statements:

1. A shallow sea resulting from

epeirogenesis, located within a

continent or upon a continental shelfis known as empiric sea

2. Black Sea, Baltic Sea and Hudson

Bay are some of continental seas

Which of the above statements is/areincorrect?

a. 1 only

b. 2 onlyc. Both 1 and 2

d. Neither 1 nor 2

e. d4. Ocean basins comprise only the

1. Littoral zone

2. Neritic zone3. Bathyl zone

4. Abyssal zone

Select the correct answer from the codes

given below:

Codes:a. 1 and 3

b. 2 and 3c. 3 and 4

d. 2 and 4

e. c5. Ocean floor does not include

a. Pelagic zone

b. Neritic zone

c. Bathyl zone

d. Abyssal zone

e. a

6. Which one of the following statements isincorrect?

a. Abyssal plains are more common

where land-derived sediments are ingreat supply

b. The exit of submarine canyons in the

deep- ocean floor are devoid of fanshaped mass of sediments

c. Slopes with sea mounts is one among

five types of continental slope

d. The continental rise, with increasingdepth, becomes virtually flat

e. b

7. Match List-I with List-II and select the

correct answer from the codes givenbelow the lists:

List-IA. Detached elevation with shallow

depths

B. Flat topped elevation in continental

marginsC. Flat topped sea mounts

D. Organic deposit by living or dead

organismList-II

1. Guyot2. Reef 3. Shoal

4. Bank

Codes:A B C D

a. 3 1 4 2

b. 4 1 3 2

c. 3 4 1 2d. 4 3 1 2

e. c

8. The largest canyons in the world occur ina. Bering Sea off Alaska

b. South China Sea

c. Philippine Sead. Bering Sea off Kamchatka

e. a

9. Which of the following feature is not

found in Atlantic Ocean?1. Faeroe island

2. Easter island

1


2/26


3. Gough island

4. Phoenix island

5. Santa Cruz islandSelect the correct answer from the codes

given below:

Codes:a. 1, 3 and 5

b. 2, 3 and 4

c. 2, 4 and 5d. 1, 2, 4 and 5

e. c

10. Consider the following statements:

1. There are no trenches found in IndianOcean except Sunda trench

2. Seychelles ridge divides Arabian Sea

into two parts


a. 1 onlyb. 2 only

c. Both 1 and 2

d. Neither 1 nor 2

e. c11. Match List-I with List-II and select the

correct answer from the codes given

below the lists:List-I (Islands)

A. Lakshadweep

B. Andaman & NicobarC. Mauritius

D. Sagar

List-II (Origin)1. Continental blocks

2. Coral islands

3. Ocean mud deposits

4. VolcanicCodes:

A B C D

a. 2 4 1 3b. 2 1 4 3

c. 2 4 3 1

d. 2 3 4 1e. b

12. Match List-I (Topographical feature)

with List-II (Gradient) and select the


List-I

A. Continental shelf

B. Continental rise

C. Continental slopeList-II

1. 2 to 50

2. 1 to 23. 0.5 to 1

Codes:

A B Ca. 3 1 2

b. 2 1 3

c. 1 2 3

d. 2 3 1e. d

13. Arrange the following marginal seas

from north to south and choose the

correct answer from the codes givenbelow:

1. Molucca Sea2. Sulu Sea

3. Celebes Sea

4. Seram Sea

5. Banda SeaCodes:

a. 2, 3, 1, 4 and 5

b. 2, 1, 4, 3 and 5c. 4, 3, 1, 5 and 2

d. 4, 2, 5, 3 and 1

e. a14. Arrange the following marginal seas

from east to west and choose correct

answer from the codes given below:1. Ionian Sea

2. Linguarian Sea

3. Tyrrhenian Sea

4. Marmara Sea5. Azove sea

Codes:

a. 4,5,1,3,2b. 5,4,1,3,2

c. 5,4,3,1,2

d. 4,5,3,1,2e. b

15. The eastern boundary of the Pacific

Ocean have which of the following

features?1. good number of deep trenches

2. subduction plate boundary

2


3/26


3. few submarine plateaus and rises


given below:Codes:

a. Only 2


d. 1 and 3

e. c16. Which of the following features are

absent in Pacific Ocean Basin?

1. Walvis ridge

2. South Sandwich trench3. Albatross Cordillera

4. Tonga trench


given below:Codes:

a. 2 and 4b. 1 and 3

c. 1 and 2

d. 3 and 4

e. c17. Which of the following topographical

features are found in Indian Ocean

Basin?1. Lord Howe rise

2. Mendocino seascarp

3. Amsterdam-St. Paul Plateau4. Prince Edward Crozet ridge


given below:Codes:

a. 3 and 4

b. 1, 3 and 4

c. 1, 2 and 4d. 2 and 4

e. a

18. Which of the following geographicalfeatures are there in Indian Ocean?

1. Zanzibar ridge

2. Sunda trench3. Mascarene basin 4. St. Helena basin

Select the correct answer from the given

below:

Codes:a. 1 and 2

b. 2 and 3

c. 2, 3 and 4

d. 1, 2 and 3

e. d19. The region marked A in the figure

represents

a. Bathyl zone

b. Pelagic zonec. Littoral zone

d. Neritic zone

e. c

20. One conspicuous feature divides theIndian Ocean into almost two basins on

its either side.

This feature is1. Lakshadweep-Chagos ridge

2. St. Paul ridge

3. Amstardom-St. Paul plateauSelect the correct answer from the codes

given below:

Codes:a. 1 and 3

b. 2 and 3c. 1, 2 and 3d. None of the above

e. c

21. Which of the following geographical

features are there in the Pacific Ocean?1. Puerto Rico trench

2. Bonin trench

3. Emperor Seamount chain4. Kuriltrench


given below:Codes:

a. 1, 2 and 3

b. 1, 3 and 4

c. 1, 2 and 4d. 2, 3 and 4

e. d

22. Pacific Ocean has numerous marginalseas, e.g. Okhotsk Sea, Celebes Sea, etc.

3


4/26


Most of the marginal seas are located in

the of Pacific Ocean.

a. South Westb. South

c. West

d. North Weste. c

23. Pacific Ocean has innumerable islands in

it. Most of the mid-oceanic islands ofPacific Ocean are of which origin?

1. Volcanic

2. Coral

3. Sea mountsSelect the correct answer from the codes

given below

Codes:


c. 1 and 3d. None of the above

e. c

24. Which of the following features are

absent in the Atlantic Ocean Basin?1. Cayman trench

2. Guiana Basin

3. Wyville Thomson ridgeSelect the correct answer from the codes

given below:

Codesa. Only 1

b. Only 2

c. Only 3d. None of the above

e. d


1. The conspicuous Mid-Atlantic ridgestarts in the north near Iceland as

Telegraph Plateau.

2. Ascension island near equator dividesthe Mid-Atlantic ridge into northern

and southern part.

3. Ninety East Ridge is the southernmost portion of Mid Atlantic ridge.

Which of the above statements is/are not

correct?

a. Only 1b. Only 3

c. 2 and 3

d. None of the above

e. c

26. The Reykjanes ridge is marked in thefollowing figure as

a. A

b. Bc. C

d. D

e. d

27. The maximum width of the continentalshelf is off the

a. Antarctic coast

b. Greenland coastc. Arctic coast of Siberia

d. Arctic coast of Canada

e. c28. Match List I (Height/Depth) with List II

(Features,) and select the correct answer

from the codes given below the lists.List I

A. Maximum depth of 200 mB. Depth of about 3660 m

C. Height of 1,000 m from sea floorD. Height of 1100 m and above from sea

floor

List II1. Abyssal Hills

2. Guyots

3. Oceanic plain4. Continental slope

5. Continental shelf

Codes:A B C D

a. 5 4 1 2

b. 5 3 1 4

c. 5 3 2 1d. 5 4 2 1

e. a

29. Match List I with List II and select thecorrect answer from the codes given

below the lists.

4


5/26


List I

A. Zaire Canyon

B. Canyons of Southern CaliforniaC. Canyons of Bering Sea

D. Oceanographer Canyon

List II1. Small gorges

2. Riverine Canyon

3. Dendritic Canyons4. Largest Canyons

Codes:

A B C D

a. 1 4 3 2b. 2 4 3 1

c. 1 3 4 2

d. 2 3 4 1

e. d30. Arrange the following Oceans in the

decreasing order of their percentage ofcontinental shelf areas:

1. Indian Ocean

2. Atlantic Ocean

3. Pacific OceanSelect the correct answer from the codes

given below:

Codes:a. 2,1,3

b. 2,3,1

c. 3,1,2d. 3,2,1

e. b

31. The deepest continental shelves surroundthe

a. Russia

b. Japan

c. Antarcticad. South America

e. c

32. Match List I (Percentage of total seasurface) with List II (Features) and select

the correct answer from the codes given

below the lists.List I

A. Ocean deeps

B. Continental slopes

C. Continental shelvesList II

1. 1. 7.6%

2. 1.2%

3. 8.5%

Codes:A B C

a. 2 3 1

b. 1 2 3c. 1 3 2

d. 2 1 3

e. a33. Consider the following statements:

1. There is a greater thickness of sima

on the continental shelf.

2. The coast along Congo reveals 2500-3500 m thick Cretaceous and Tertiary

sediment on the sloping surface.

3. Outcrops of crystalline rocks are

found on the shelf, e.g. Paleozoicrocks in English Channel and granite

in Californian submarine canyons.Which of the above statements is/are not

correct?

a. Only 1

b. Only 2c. Only 3

d. All of the above


1. In most of the areas, the continental

shelf is formed by constructiveaction.

2. Precambrian shield is discovered

under thick sediment of Mississippiriver on the continental shelf.

3. The assortment of sediments from

coarse to fine is found on the shelf.

Which of the above statements is/arecorrect?

a. Only 2


d. 1 and 3

e. d35. Which of the following are correct?

1. The Northern Pacific is the deepest

part of the ocean.

2. The South-West Pacific is devoid ofmarginal seas.

5


6/26


3. The South-East Pacific has broad

submarine ridges and plateaus.

4. The ocean floor of the Pacific Oceanis fairly uniform with broad rises and

depressions.

Select the correct answer from the codesgiven below.

Codes:


c. 1, 3 and 4

d. 1, 2, 3 and 4

e. c36. Which of the following submarine

features are depositional in character?

1. Submarine canyons

2. Corals3. Continental slope

4. Seamounts5. Deep sea plain


given below:

Codes:a. 1, 2 and 3

b. 2, 3 and 5

c. 1, 4 and 5d. 2, 4 and 5

e. b

37. The evolution of mid-Atlantic ridge canbe dated back to

a. Pliocene age

b. Oligocene agec. Cretaceous age

d. Eocene age

e. a

38. The first submarine cables were laid ona. Albatrass Plateau

b. Walvis Ridge

c. Telegraph Plateaud. Doiphin Range

e. c

39. Which of the following theories does notexplain the origin of submarine canyons?

1. Submarine Density Current Theory

2. Turbity Current Theory

3. Subaerial Erosion TheorySelect the correct answer from the codes

given below:

Codes:

a. Only 3

b. Only 2c. Only 1

d. None of the above

e. d40. Match List I (Percentage of total volume

of marine sediments) with List II (Marine

regions) and select the correct answerfrom the codes given below the lists.

List I

A. 15%

B. 41%C. 31%

D. 13%

List II

1. Continental shelves2. Continental slopes

3. Continental rises4. Deep ocean floors

Codes:

A B C D

a. 1 3 2 4b. 4 3 2 1

c. 4 2 3 1

d. 1 2 3 4e. b


1. The famous Mindanao trench islocated along the eastern margin of

South China Basin.

2. The Kermode trench lies almostalong International Date Line below

Tonga.

3. The Aleutian trench lies in the Arctic

Ocean.Which of the above statements is/are

correct?


c. 1 and 2

d. All of the abovee. c

42. Which of the following is/are correct?

1. The depth of water over a bank is

relatively small and is dangerous fornavigation

6


7/26


2. Dogger Bank is made of glacial

erosion during Pleistocene Ice Age

Select the correct answer from the codesgiven below.

Codes:

a. 1 onlyb. 2 only

c. Both 1 and 2

d. Neither 1 nor 2e. d

43.

Consider the above diagram. Which of

the following marine features is depictedby it?

a. Submarine canyon

b. Sea mounts

c. Guyotsd. Oceanic ridge

e. a

44. Match List I (Nature) with List II(Islands) and select the correct answer

from the codes given below the lists:

List IA. Oceanic ridge

B. Volcanic

C. Atoll

List II1. Tristan da Cunha

2. Tonga

3. BikiniCodes:

A B C

a. 2 1 3b. 1 2 3

c. 3 2 1

d. 3 1 2e. b

45. Hypsographic or Hypsometric Curve is

used

a. For ocean bottom relief

b. To depict percentage of elevated earth

surface.c. For the representation of topography

and relief in relative values with

reference to the sea level.d. To show the relative diversity of land

and ocean features in comparison to a

given datume. c

46. Arrange the following marine features as

one finds them in course of his

movement from the coast to the mid-oceanic part:

1. Shoal

2. Sea mounts

3. Continental rise4. Continental slope

5. Ocean deepsSelect the correct answer from the codes

given below:

Codes:

a. 1, 4, 5, 3, 2b. 1, 4, 3, 5, 2

c. 4, 1, 5, 3, 2

d. 4, 1, 3, 5, 2e. b

47. Arrange the following features as one

finds them in his trip from SakhalinIsland to Philippines along the Eurasian

coast:

1. Tsugaru strait2. Tsushima strait

3. Le Prouse strait

4. Bonintrench

Select the correct answer from the codesgiven below:

Codes:

a. 1,3,2,4b. 3,1,2,4

c. 1,3,4,2

d. 3, 1,4.2e. b

48. A: Latitude is in no way a bar to the

development of submarine canyons.

R: Formation of submarine canyonsdepends on submarine volcanism, which

leads to long furrows.

7


8/26


a. Both A and R are true and R is the

correct explanation of A

b. Both A and R are true but R is not thecorrect explanation of A

c. A is true, but R is false

d. A is false but R is truee. c

49. A: The number of deeps in the Atlantic

Ocean is far less than in the PacificOcean

R: There is the marked absence of the

effects of Tertiary orogenic movements

along the Atlantic coasts.a. Both A and R are true and R is the


b. Both A and R are true but R is not the

correct explanation of Ac. A is true, but R is false

d. A is false but R is truee. b

50. A: The Atlantic Ocean began to form

about 500 million years ago.

R: During Pre-Cambrian period, sea floorspreading started and westward

movement of the American plate and

eastward movement of the Eurasian andAfrican plates from the mid-Atlantic

ridge were initiated.

a. Both A and R are true and R is thecorrect explanation of A



d. A is false but R is true

e. d

51. A: The continental shelves are lessextensive along the western coasts of

America.

R: There is nearness of cordilleran chainsof folded mountains to the coastal lands

of western America.




c. A is true, but R is falsed. A is false but R is true

e. a

52. A: The Pacific has the largest number of

islands and most of island is formed in its

Central and South-West part.R: The constructive plate boundary lies in

the Central and South-West part of the

Pacific plate.a. Both A and R are true and R is the





e. c53. Arrange the following features as

Magellan could have found them in his

trip:

1. Megallan strait2. Chile rise

3. Dolphin range4. Albatross

5. Cordillera

6. Coral Sea


Codes:

a. 1, 3, 2, 4, 5b. 3, 1, 2, 5, 4

c. 1, 3, 2, 5, 4

d. 3, 1, 2, 4, 5e. c

54. If one travels from Dominican Republic

to Iceland he will find the followingfeatures. Arrange them as one approaches

Iceland:

1. Grand Bank

2. Puerto Rico Trench3. Wyville Thomson Ridge

4. Telegraph Plateau

5. Bermuda BasinSelect the correct answer from the codes

given below:

Codes:a. 2, 5, 1,4,3

b. 2, 1,5,3,4

c. 2, 1,5,4,3

d. 2, 5, 1,3,4e. a

55. Consider the following description:

8


9/26


1. It has an average slope of 0.5 to 10

2. Its general relief is low

3. It lies in the conjunction of continental margin and oceanic floor

4. its width is quite less

The above description fits toa. Continental slope

b. Continental rise

c. Continental shelfd. Continental fringe

e. b


1. The total length of the submarineridge system is more than 75,000 km.

2. Submarine ridges contain sea mounts.

3. Sea mounts and guyots are of

volcanic origin.Which of the above statements is/are not

correct?a. Only 1

b. Only 2

c. 1 and 2

d. None of thesee. b

57. Match List I (Canyons) with List II

(Types of Submarine Canyons) and selectthe correct answer from the codes given

below the lists:

List IA. Southern California Canyons

B. Jndus Canyon

C. Oceanographer CanyonList II

1. Gorges at the edge of continental

shelf

2. Dendritic Canyons3. River mouth Canyons

Codes:

A B Ca. 1 3 2

b. 1 2 3

c. 3 2 1d. 3 1 2

e. d

58.

A.

B.

C.

Consider the above figures and match

with the given features.1. Fiord

2. Ria

3. Dalmatian coastCodes:

A B C

a. 2 3 1

b. 1 3 2c. 2 3 1

d. 1 2 3

e. c59. Match List I (Examples) with List II

(Types of Coasts) and select the correct

answer from the codes given below thelists:

List I

A. Yugoslavian coast along Adriatic Sea

B. British Columbia coast along PacificOcean

C. South-West Ireland Coast along

Atlantic OceanD. Hamburg along Elbe in North Sea

List II

1. Ria2. Fiord

9


10/26


3. Dalmation

4. Estuarine

Codes:A B C D

a. 2 3 4 1

b. 3 2 4 1c. 2 3 1 4

d. 3 2 1 4

e. d60. The feature marked A in the figure is

a. Sea knoll

b. Submarine ridgec. Sea mount

d. Guyot

e. a

OCEAN TEMPERATURE61. A: The annual range of temperature in

any part of the ocean is very much

smaller.R: Water warms up and cools down

much more slowly than land.





e. a

62. A: Ports of eastern Canada even at 45N

are ice bound for almost half the year.R: Cold water flowing out through

Bering Strait tends to reduce the surfacewater temperature.


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




e. b

63. Match List-I (Latitudes) with List-II

(Average annual temperatures) and selectthe correct answer from the codes given

below the lists:

List-IA. Equator

B. 200

C. 60D. 40

List-II

1. 1C

2. 23C3. 14C

4. 26C

Codes:

Codes: A B C D

a. 2 3 4 1b. 2 4 3 1

c. 4 1 2 3

d. 4 2 1 3

e. d64. The main processes of cooling the ocean

water includes

1. Absorption of radiation2. Evaporation

3. Back radiation of heat from the sea

surface4. Convection


given below:Codes:

a. 1, 2 and 3

b. 2, 3 and 4

c. 1, 2 and 4d. 1, 3 and 4

e. b

65. A: The annual range of temperature isgreater in the Atlantic than in Pacific

Ocean.

R: Average salinity of the Pacific Oceanis greater than Atlantic Ocean.





10


11/26



e. c

66. A: The annual range of temperature isgreater in the southern hemisphere as

compared to northern hemisphere in

oceans.R: Northern hemisphere has got the

extensive continental blocks.





e. d

67. The highest temperatures are recorded in

thea. Enclosed tropical seas

b. Enclosed temperate seasc. Open tropical seas

d. Open temperate seas

e. a

68. A: The isotherms in the oceans do not runparallel to the lines of latitudes.

R: They are affected by the prevailing

winds and the ocean currents.a. Both A and R are true and R is the




d. A is false but R is truee. a

69. Which among the following is incorrect?

a. Western sections of tropical oceans

are warmer than the eastern sectionsb. In temperate zone, trade winds make

eastern sections of oceans warmer

than western sectionsc. The isotherm of 0C forms an

irregular circle round the polar areas

d. In the sub-polar region, the oceans inthe eastern region are much warmer

than the oceans in the western regions

at the same latitude

e. b70. Consider the following statements:

1. The enclosed seas in the low latitudes

record relatively higher temperature

than the open seas.2. The enclosed seas have lower

temperature than the open seas in the

high latitudes3. Local weather conditions, location

and shape of the ocean are few minor

factors, which may affect the oceantemperature. Which of the above

statements is/are correct?

a. 1 and 3


d. All the above

e. d

71. What is the average temperature of thesurface water of the oceans?

a. 26.7Cb. 25.4C

c. 27.2C

d. 24.5C


1. The highest temperature of surface

water of the oceans is at 10N to12N latitude.

2. The average annual temperature of

Indian Ocean is 20.6C.3. The lowest surface water temperature

of ocean is recorded between 80N

and the North Pole and between 75Sand the South Pole.


correct?


c. 1 and 2

d. None of the abovee. c

73. A zone in which density of water increase

with increasing depth is calleda. Thermocline

b. Halocline

c. Pycnocline

d. Photoclinee. c

11


12/26


74. A: The difference between air and sea

surface temperature causes fogs over the

seas and the oceans.R: Condensation occurs when warm

@@@@@@@ passes over a cold sea

surface having @@@@ temperaturebelow dew point of the @@@@@@@a. Both A and R are true and R is the




d. A is false but R is truee. b

75. A: The temperature of the aphotic

@@@@@@@ much less as compared

to the photic @@@@@@@ ocean.R: The rate of decrease of temperature

with increasing depth is uniform and thetemperature falls rapidly.






76. A: The areas of the ocean, which fail

within the offshore wind system recordslow surface temperature.

R: Surface water of ocean is driven away

by the offshore wind system results in theupwelling of the cold water, which

lowers the surface water temperature.





e. a

77. A: The temperature at the ocean bottomsis uniform from equator towards the pole.

R: The rate of decrease of temperature

with increasing depth is more rapid near

the equator than towards the pole.a. Both A and R are true and R is the





e. b

78. A: The enclosed sea of high latitudesregister inversion of temperature i.e. the

temperature of sea surface is lower than

the temperature below.R: The oceanic temperature is a function

of oceanic currents and not of latitudes.






79. A: Surface isothermals of ocean are not parallel to the sea level but on the

contrary they make an angle with it.

R: The vertical late of fall of the

temperature from equator to poles is notthe same as the surface temperature

decreases with the increasing latitude,

whereas the bottom temperatures remainalmost the same.





e. a

80. A: The freezing temperature of the sea

water is not 0C but an appreciably lowertemperature than that.

R: The freezing temperature of the sea

water depends on salinity and higher thesalinity, higher is the freezing point.






12


13/26


81. Which of the following processes are not

associated with the heat budget of the

ocean?1. Conduction

2. Absorption of radiation

3. Convection4. Evaporation

5. Radiation of sea surface


Codes:

a. Only 1

b. Only 5c. 3 and 5

d. 1 and 3

e. a

OCEAN SALINITY

82. The average salinity of ocean water is

a. 36%ob. 35%o

c. 34%o

d. 37%oe. b

83. Ocean water contains dissolved salts

about

a. 59 million tonnes/m

3

b. 61 million tonnes/km3

c. 41 million tonnes/km3

d. 31 million tonnes/km3

e. c

84. Arrange the following water bodies in a

sequence of increasing salinity:1. Dead Sea

2. Lake Van

3. Arabian Sea

4. Salt Lake


Codes:a. 2, 1, 4, 3

b. 4, 2, 1, 3

c. 4, 1, 2, 3d. 4, 3, 2, 1

e. a

85. Lines joining places having an equaldegree of salinity is

a. Isohyets

b. Isocline

c. Isohalined. Isohel

e. c

86. A: The water fringing the high pressure belts of trade wind deserts have high

salinity.

R: There is high rate of evaporationcaused by high temperature and low

humidity.






87. Arrange the following water bodiesaccording to their decreasing salinity:

1. Hudson Bay

2. Persian Gulf

3. Sea of Japan4. North Sea


given below:Codes:

a. 4,1,2,3

b. 1,4,3,2c. 4,3,1,2

d. 1,3,4,2

e. d88. Which of the following latitudinal zone

records the average salinity of the ocean

water?

a. 40N-15Nb. 15N-10S

c. 10S-30S

d. None of the abovee. b

89. A: The oceans in the Northern

Hemisphere record maximum andminimum salinity during June and

December respectively.

R: The oceans record increased rate o

evaporation during June and lowevaporator during December.

13


14/26







90. A: Due to the free movement of ocean,

water, the proportions of different salts,remain remarkably constant in all oceans

and even to great depths.

R: The degree of concentration of the salt

solution in oceans does vary appreciablyin different areas.





e. b

91. A: Gulf of Mexico records 36%o to

37%o salinity whereas it is only 34% inthe Gulf of California.

R: Trade winds drive away saline waters

from the western coasts of the continentsand pile them up near the eastern coasts

resulting upwelling in the western coast

thereby causing low salinity in thewestern coast and high salinity in the

eastern coast of the continents.





e. a

92. A: The salinity of ocean is higher nearthe equator than in the tropics.

R: Evaporation is a major factor

controlling ocean salinity.a. Both A and R are true and R is the





e. d

93. A: Salinity of ocean is not a function of

latitude.R: Factors like evaporation, precipitation,

influx of river water, atmospheric

pressure and wind direction, andcirculation of oceanic water are the major

controlling factors of oceanic salinity.





e. d

94. A: Salinity increases with increasing

depth in high latitudes i.e. there is apositive relationship between the amount

of salinity and depth.R: At high latitude, denser water lies

below and surface water receives fresh

water from the melting ice.





e. a95. A: Gulf of Bothnia records the lowest

salinity of less than 2%o.

R: Salinity is a function of latitude.a. Both A and R are true and R is the





e. b96. A: Water near the freezing ice has more

than the average amount of salt.

R: The ice in the process of freezing,leaves the salt behind as a residue in the

water.




14


15/26




e. a97. A: Beyond 1000 fathoms, ocean water

never freezes.

R: The high density water alwaysremains at greater depth with average

salinity around 34%.





e. d

98. Arrange the following salts in the ocean

in descending order of their presence andselect the correct answer from the codes

given below:1. Magnesium Chloride

2. Calcium Sulphate

3. Potassium Sulphate

4. Magnesium sulphateCodes:

a. 1,2,3,4

b. 1,4,2,3c. 1,3,4,2

d. 1,2,3,4

e. b99. Arrange the following river mouth

regions according to their decreasing

salinity:1. Congo

2. Niger

3. Ganges

4. St LawrenceSelect the correct answer from the codes

given below:

Codes:a. 2,1,4,3

b. 3,2,4,1

c. 4,2,3,1d. 1,4,3,2

e. d

100. Which of the following elements are

commercially exploitable from ocean,water?

1. Magnesium

2. Bromine

3. Boron

4. IronSelect the correct answer from the codes

given below:

Codes:a. 1,2,3

b. 2,3,4

c. 3,4,5d. 1,3,4

e. a

101. Which of the following properties of the

oceans are controlled by the salinity?1. Humidity

2. Compressibility

3. Thermal expansion

4. Absorption of insulationSelect the correct answer from the codes

given below:Codes:

a. 1, 3 and 4

b. 2, 3 and 4

c. 3 and 4d. All the above

e. d

OCEAN DEPOSITS


1. Pelagic refers to open water

environment and includes the entiremass of water

2. Benthic refers to that part of ocean

bottom which is populated byorganisms

Which of the above statements is/are

correct?

a. 1 only


d. Neither 1 nor 2e. c

103. Which of the following ooze belong to

animal kingdom?a. Diatomaceous

b. Coccolithophores

c. Pteropod oozed. Foraminifera

15


16/26


e. d

104. Sargassum algae found in North Atlantic

Ocean is rich ina. Calcium and iron

b. Calcium & phosphate

c. Iodine and potashd. Iodine and iron

e. c

105. A: Coral grow on seaward side morerapidly.

R: The food supply is more plentiful on

the seaward side.






1. Coral polyps thrive well in clear salt

water

2. Coral polyps avoid delta regionWhich of the above statements is/are

correct?

a. 1 onlyb. 2 only

c. Both 1 and 2


107. Fringing reefs occur in

1. Gulf of Mannar2. Ellice island

3. Funafuti

4. Lakshadweep

5. New HebridesSelect the correct answer from the codes

given below:

Codes:a. 1 and 3

b. 1 and 5

c. 1, 2, 3 and 5d. 1, 2, 3, 4 and 5

e. b

108. Which one of the following rightly

defines a true atoll?a. An atoll surrounding a lagoon with an

island in it

b. An atoll built by erosion and

deposition with island crowns formed

on themc. An atoll surrounding a lagoon with no

island in it

d. None of the abovee. c

109. Which one of the following is an atoll

island?a. Sagar island

b. Andaman & Nicobar

c. Sriharikota

d. Lakshadweep islandse. d

110. Match List-I (Region) with List-II (% of

total sediment) and select the correct

answer from the codes given below thelists:

List-IA. Continental shelf

B. Deep sea floor

C. Continental rise

D. Continental slopeList-II

1. 38

2. 143. 28

4. 12

Codes:A B C D

a. 2 4 3 1

b. 2 3 1 4c. 4 2 1 3

d. 4 1 2 3

e. a

111. Sediments derived from the materials insolution are called

a. Terrigenous

b. Hydrogenousc. Cosmogenous

d. Biogenous

e. b112. Accumulation of biogenous sediments on

the sea floor depends on

1. Production

2. Erosion3. Dilution

4. Temperature

16


17/26


5. Dissolution


given below:Codes:

a. 1,2,3,4

b. 1,2,4,5c. 1,3,5

d. 2,4,5

e. c113. The deposit is called ooze when the

biogenous component makes up over

a. 20% of sediment mixture

b. 50% of sediment mixturec. 30% of sediment mixture

d. 10% of sediment mixture

e. c

114. A: Siliceous oozes are not found so muchin corresponding northern waters.

R: Heavy dilution by terrigenoussediments and ice cover inhibits

biological productivity.





e. a

115. The depth below which calcareousskeletons dissolve as fast as they

accumulate is called

a. Calcium carbonate compensationdepth

b. Sodium carbonate compensation

depth

c. Sodium chloride compensation depthd. Sodium bicarbonate compensation

depth

e. a116. Match List I (Propounders) with List II

(Theories on forination of Corals) and

select the correct answer from the codesgiven below the lists:

List I

A. Dana & Davis

B. Yabe & AsanC. Daly

D. Murray & Semper

List II

1. Glacial Control Theory

2. Subsidence Theory3. Karstic Saucer Theory

4. Antecedent Platform Theory

Codes: A B C D

a. 1 3 2 4

b. 2 3 1 4c. 1 4 2 3

d. 2 4 1 3

e. b

117. Consider the following statements:1. Calcareous oozes dominate about

48% of all deep ocean sediments

2. Siliceous oozes dominate about 14%

of all deep ocean areasWhich of the above statements is/are

correct?a. 1 only

b. 2 only

c. Both 1 and 2


118. Red clay deposition is widely found in

a. Arctic Oceanb. Atlantic Ocean

c. Indian Ocean

d. Pacific Oceane. d

119. Match List I (Deposits) with List II

(Marine regions) and select the correctanswer from the codes given below the

lists.

List I

A. Blue mud green mudB. Sand silts

C. Ooze

D. Organic MatterCodes:

List II

1. Continental Margins2. Shallow Sea

3. Bathyl Region

4. Abyssal Plain

Codes:A B C D

a. 4 1 3 2

17


18/26


b. 4 2 3 1

c. 3 1 4 2

d. 3 2 4 1e. d

120. Match List I (Marine Deposits,) with List

II (Area Percentage) and select thecorrect answer from the codes given

below the lists.

List IA. Littoral and shallow water deposits

B. Deep sea(Terrigenous) deposits

C. Pelagic Ooze and Red clay

List II1. 15.4%

2. 75.5%

3. 9.1%

4. 60.3%Codes:

A B Ca. 1 3 4

b. 3 1 4

c. 3 1 2

d. 1 3 2e. c

121. Coral formation takes place from an

organism belonging toa. Echinoderm group

b. Hydrozoa group

c. Protozoa groupd. Amphipod group

e. b

122. The feature marked A in the figure is

a. Barrier reefsb. Fringing reefs

c. Atollsd. None of the abovee. b

123. Consider the following statements

regarding the conditions for coral growth:

1. The water temperature must remainabove 20C.

2. The depth of the water should not

exceed 30 fathoms or 55 m.

3. The salinity should be between 15%o

and 25%o

The correct conditions area. 1 and 2

b. 2 and 3

c. 1 and 3d. All the above

e. a

124. Pteropod Ooze is mainly found in whichof the following ocean?

1. Arctic Ocean

2. Atlantic Ocean

3. Pacific Ocean4. Indian Ocean


given below:

Codes:a. Only 2

b. Only 3c. 2 and 4

d. 1 and 3

e. a

125. Match List I (Origin) with List II(Deposits) and select the correct answer

from the codes given below the lists.

List IA. Littoral

B. Hemipelagic

C. EupelagicList II

1. Green mud, volcanic mud, coral mud

2. Red clay, Diatom, Ooze3. Shore deposits, shelf deposits

Codes:

A B C

a. 1 3 2b. 2 3 1

c. 3 2 1

d. 3 1 2e. d

126. Continental or terrigenous deposits can

be further subdivided into1. Littoral deposit

2. Neritic deposit

3. Terrigenous mud

4. Shallow water depositWhich of the above is not correctly

mentioned?

18


19/26


a. Only 1

b. Only 4

c. Only 2d. 1 and 4

e. c

127. Match List (Deposits) with List II (Geographical Region) and select the correct

answer from the codes given below the

lists.List I

A. Green mud

B. Blue mud

C. Red mudList II

1. Mediterranean Sea, Banda Sea, Arctic

Ocean

2. Pacific region south of Cape Hatterasand California, off the coasts of

Japan, Australia3. Yellow Sea, coasts of Brazil and floor

of Atlantic Ocean

Codes:

A B Ca. 1 2 3

b. 2 3 1

c. 3 2 1d. 2 1 3

e. d

128. Oozes are broadly classified as siliceousand calcareous ooze. Choose the siliceous

ooze from the following:

1. Diatom2. Rhaodospheres

3. Pteropod

4. Foraminifera


Codes:

a. Only 1b. Only 3

c. 1 and 2

d. 3 and 4e. a

129. Radiolarian and Diatom ooze can be

found at a greater depth than pteropod

and globigerina ooze. This is because1. Siliceous oozes are less soluble

2. Calcareous materials are easily

soluble

3. Radiolaria and diatom are made ofhard crustacean shells

4. Foraminifera and pteropod forming

organism cannot live at greaterdepths.


given below:Codes:

a. 1 and 2

b. 1 and 4

c. 2 and 3d. 3 and 4

e. a

130. In which of the following radioactive

substances are mostly formed andrecognized, more than in any other

marine deposits?1. Terrigenous deposits

2. Cosmogenous deposits

3. Red clay

4. Blue mudSelect the correct answer from the codes

given below:

Codes:a. Only 1

b. Only 3


e. b

131. Consider the following statements:1. Coarse grained deposits composed of

quartz and limestone usually have

white colour.

2. Black deposits having iron contentsare found in stagnant fords and

basins.

3. River borne debris is generally foundto be yellow, red or brown.

4. Which of the above statements is/are

not correct?a. Only 1

b. Only 2

c. Only 3

d. None of the abovee. d


19


20/26


1. The general rate of sedimentation for

all deposits is extremely small in the

open seas.2. Rate of deposition is calculated by

two methods, viz. stratigraphic

method and supply method.3. Supply method estimates the total

thickness of sediment in the given or

total time.Which of the above statements is/are

correct?

a. 1 and 2


d. All the above

e. b

133. A heap of coral sand eroded from the reefand piled up by the wave action on the

sea side of a reef. They are usually leviedof vegetation and are flattish. These are

absent from poorly developed reefs.

The above description aptly describes

a. Island reefsb. Low weeded island

c. Coral fringe

d. Sand cayse. d

134. Match List I (Descriptions) with List II

(Features of atoll) and select the correctanswer from the codes given below the

lists:

List IA. These are chains of small atolls with

lagoons of not much depth.

B. These are isolated shapeless reefs

C. These are old reefs which onceformed in past are no longer being

built up.

D. These are pointed turrets of small sizerising within the lagoons, and coming

close to the lagoon surface.

List II1. Coral Banks

2. Coral Pinnacles

3. Faros

4. Submerged and Raised ReefsCodes:

A B C D

a. 3 1 2 4

b. 1 3 2 4

c. 3 1 4 2d. 1 3 4 2

e. c

135. Arrange the following marine sedimentsfrom the smallest diameter to the largest:

1. Pebble

2. Sand3. Cobble

4. Clay

5. Silt


Codes:

a. 5,4,2,3,1

b. 5,4,2,1,3c. 4,2,5,3,1

d. 4,5,2,1,3e. d

136. Which of the following categories suit

the description of petroleum and coal?

1. Terrigenous deposits2. Biogenous fossils

3. Biogenous and hydrogenous deposits

4. Organic fuelsSelect the correct answer from the codes

given below:

Codes:a. 2 and 4

b. 1 and 4

c. 3 and 4d. 1, 3 and 4

e. a


1. Phytoplanktons such as diatoms aregood source of vitamins

2. Most of the aquacultured food in the

international market is coming fromChina and India.


correct?a. Only 1

b. Only 2

c. Both 1 and 2

d. Neither 1 nor 2e. d

20


21/26


138. A: Radiolaria and diatom are found in

deep water.

R: Being siliceous in nature, radiolariaand diatom does not get dissolved easily.





e. a

139. A: Pteropods are found only in sub-

tropical region and shallow oceanic andsea region; whereas globigerina can be

found at greater depths and in both

temperate and tropical region.

R: Shells of pteropods are thinner andeasily soluble whereas globigerina lives

in cold water and is absent in shallowmuddy water.






140. A: Around 80% of the oceanic biomass

are from its neritic and bathy pelagiczone in the open oceans.

R: The continental shelf region is the hub

of inorganic nutrients only.a. Both A and R are true and R is the






1. Littoral zone is comparatively free

from wave action2. The nekton includes mainly small

fishes only

3. The nektons are found both in photic

as well as aphotic zones4. The abyssal zone is devoid of

producers


correct?


c. 3 and 4

d. 3 and 2e. b

OCEAN CURRENTS

142. Consider the following statements:1. In the lower latitudes, warm currents

flow on the western shores and cold

currents on the eastern shores2. A notable exception to general

scheme of circulation of ocean

current is found in the southern partof Indian Ocean

Which of the above statements is/are

incorrect?

a. 1 onlyb. 2 only

c. Both 1 and 2


143. The arrow mark in the figure indicates

a. Oyashio current

b. Okhotsk current

c. Japan currentd. Alaska current

e. a

144. Which one of the following is not a coldcurrent?

a. Californian current

b. Irmingar currentc. East Australian current

d. Canaries current

e. c

21


22/26


145. The arrow mark in the figure denotes

a. Warm Peruvian currentb. Cold Benguela current

c. Brazilian current

d. Cold Humboldt current

e.146. Okhotsk current which flows past

Sakhalin merges with Oya siwo off

a. Hokkaidob. Honshu

c. Shikogu

d. Kyushue. a

147. East Australian current meets south

pacific current near

a. North East Australiab. Fraser island

c. Tasmania

d. Perth

e. c148. Match List-I with List-Il and select the


List-I

A. From Gulf of Mexico to CapeHatteras

B. From Hatteras to Newfoundland

C. From Newfoundland to north eastern

part of north AtlanticList-II

1. North Atlantic drift2. Florida current3. Gulf stream

Codes:

A B Ca. 2 3 1

b. 2 1 3

c. 3 1 2

d. 1 3 2

e. a

149. The arrow mark in the figure denotes

a. Labrador currentb. Irminger current

c. Norwegian current

d. Arctic currente. a

150. Mozambique current and east

Madagaskar current join together to forma. East African current

b. Zimbabwe current

c. Agulhas current

d. Sonialian currente. c

151. One part of equatorial current passing

along the eastern side of West Indies scalled

a. West Indies current

b. Caribbean current

c. Windward islands currentd. Antilles current

e. d152. North Atlantic drift is propelled by the

force of

a. North easterly winds

b. South westerly windsc. North westerly winds

d. Polar easterly winds

e. b153. The North-East Monsoon drift of the

Indian Ocean currents is marked a

22


23/26


a. A

b. B

c. Cd. D

e. a

154. Marine fisheries are well developed inwhich of the following areas?

1. Tropical western African coast

2. Temperate eastern margin of NorthAmerica

3. South eastern basin of Indian Sea.


given below:Codes:

a. Only 2

b. Only 1


e. a155. A: The ocean surface undergoes a

continuous circulation of water mainly

through sea waves and ocean currents.

R: The temperature of the surface waterof the oceans is higher than the air

temperature above the ocean surface

which means ocean surface gives offheat.





e. d

156. A: Generally sea fogs are frequently

formed during spring and early summer.R: In spring and early summer, air

coming from over the land is warmer

while the sea surface is still cold.a. Both A and R are true and R is the





e. a

157. A: Even beyond the Arctic Circle

Murmansk and Hammer fast are all

season sea ports.R: Gulf Stream, being warm ocean

current, crosses the Norwegian Sea in the

form of North Atlantic drift.a. Both A and R are true and R is the





e. a158. A: Newfoundland and Grand Bank

developed as one of the largest fishing

grounds.

R: The cold Labrador Current and warmGulf Stream meets off the eastern

American coast to create ideal situationfor the thriving of marine biomass.






159. A: Sub-surface currents are caused by the

differences in salinity and temperature.R: Heavy surface water of Mediterranean

Sea sinks and flows westward towards

Gibralter as a sub-surface current.a. Both A and R are true and R is the





e. b160. Which of the following is not a

controlling factor for the origin and

movement of the oceanic currents?1. Gravitational force and force of

deflection

2. Atmospheric pressure, wind system,

insolation, precipitation, evaporation

23


24/26


3. Pressure gradient, temperature

difference, salinity, melting of ice,

density.4. Direction and shape of the coast,

seasonal variation, bottom

topography.Select the correct answer from the codes

given below:

Codes:a. Only 3

b. Only 1

c. 1 and 3

d. None of the abovee. d

WAVES & TIDES

161. The increased height of a tidal wavecaused by a narrowing of an estuary is

called

a. Tsunamib. Seiches

c. Bore

d. Swelle. c

162. The deep basins in the port areas which

permit the large ships to load and unload

at anytime are calleda. Wet docks

b. Decks

c. Harbour d. Loading docks

e. a

163. Neap tides are produced when the moonis near the

a. First and second quarter

b. Second and fourth quarter

c. First and third quarter

d. First and fourth quartere. c

164. The highest tides in the world occur ina. Hudson Bay

b. Gulf of Mexico

c. Bay of Bengald. Bay of Fundy

e. d


1. Tides having variations in height are

known as mixed tides

2. Two high tides and two low tidesoccurring every day is called diurnal

tide


a. 1 only


d. Neither 1 nor 2

e. c

166. Which of the followings are long waves?1. Seiches

2. Deep Sea waves

3. Wind generated waves

4. TsunamiSelect the correct answer from the codes

given below:Codes:

a. 1 and 2

b. 2 and 3

c. 1, 2 and 4d. 1, 3 and 4

e. d

167. An area of sand or mud uncovered at lowtide is called as

a. Tidal residue

b. Tidal depositc. Tidal sediment

d. Tidal flat


1. The shape of an atoll is oval, with the

major axis oriented according to the

wind direction2. The slackening of the currents on the

reef flat, and the force of the waves

on seaward side of the obstruction,causes the resulting island to be

narrow and crescentic in form.

Which of the above statements is/arecorrect?

a. Only 1

b. Only 2

c. Both 1 and 2d. Neither 1 nor 2

e. c

24


25/26


169. Match the depicted points in the figure

with the given list of features and select

the correct answer from the codes givenbelow the list:

List

1. Boulder zone

2. Lagoon

3. Coral Flat4. Edge of reef

Codes:

A B C Da. 3 4 1 2

b. 4 3 2 1c. 3 4 2 1d. 4 3 1 2

e. d

170. Match List I (Scientist) with List II

(Theories) and select the correct answerfrom the codes given below the lists:

List I

A. R A HarrisB. G B Airy

C. Laplace

D. William WhewellList II

1. Canal Theory

2. Dynamical Theory3. Progressive Wave Theory

4. Stationary Wave Theory

Codes;

A B C Da. 1 4 2 3

b. 4 1 3 2

c. 4 1 2 3

d. 1 4 3 2e. c

171. Consider the following statements:1. According to Progressive Wave

Theory, all the waves have their

origin in the Antarctic Ocean.

2. The northward moving tidal wavesare primary waves

3. The progressive wave theory explains

various anomalies and complications

found in tide of British IslesWhich of the above statements is/are

correct?


c. 1 and 3

d. Only 1e. c

172. On which of the following conditions

does the size and force of waves depend?

1. the velocity of the wind2. the duration of the wind

3. the fetch


given below:Codes:

a. Only 1b. 1 and 2

c. 1 and 3

d. 1, 2 and 3

e. d173. Neap tides are produced when the moon

is in

1. Syzygy2. Apogee

3. Perigee

4. QuadratureSelect the correct answer from the codes

given below:

Codes:a. 1 and 2

b. Only 1

c. 3 and 4

d. Only 4e. d

174. Match List I with List II and select the


List I

A. RokhamptonB. Yokohama

C. San Diego

D. Shantou

List II1. Tornadoes

2. Typhoon

25


26/26


3. Tsunamis

4. Willy Willy

Codes:A B C D

a. 4 2 1 3

b. 4 3 1 2

c. 1 2 4 3

d. 1 3 4 2e. b

26

F8502926Oceanography

Documents