1. Sunda Trench lies in:-
A. Atlantic Ocean
B. Pacific Ocean
C. Indian Ocean
D. Antarctic Ocean
Ans-C
2. Which one of the following is correct?
A. Along the Brazilian coast
B. Off the southwest African coast
C. Off Spanish and North African coast
D. Along West coast of united states
Ans-B
3. Kiel Canal connects:-
A. Baltic sea and North sea
B. Red Ocean and Mediterranean sea
C. Caribbean sea and Pacific sea
D. Atlantic Ocean and Pacific Ocean
Ans-A
4. The Falkland Islands are in:-
A. Antarctica
B. North Atlantic
C. South Atlantic
D. Pacific
Ans-C
5. The main masses of land above sea level are called:-
A. Continent
B. Islands
C. Nations
D. Countries
Ans-B
6. Assertion (A): Despite low evaporation and stable stratification of the atmosphere, salinity is high in polar regions.
Reason (R): Seawater freezes leaving the remaining water saline than before.
Codes:-
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 the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Ans-D
7. The cause for the Tsunami, as deduced by the seismologists, is:-
A. Gravitational pull of the moon
B. Low pressure through in the ocean
C. Deformation of the seafloor and vertical displacement of water
D. Sudden change in the monsoon wind
Ans-B
8. Which of the following factors affect the origin and movement of current:-
I. Gravitational Force
II. Atmospheric pressure and insolation
III. Salinity and density of water
IV. Direction and Shape of coast
A. I and II
B. I, II and IV
C. I, II and III
D. All four
Ans-D
9. Grand Banks is one of the important producers of:-
A. nitrate
B. iron ore
C. marine fish
D. bauxite
Ans-C
10. Which one of the following statements is correct?
A. Salinity decreases with increasing evaporation
B. There is an inverse relationship between precipitation and salinity
C. There is an inverse relationship between atmospheric pressure and salinity
D. Salinity increases with the influx of river water in oceans
Ans-B
11. Name the ocean in which the north equatorial current changes its direction with the season:-
A. North Pacific Ocean
B. Atlantic Ocean
C. Indian Ocean
D. South Pacific Ocean
Ans-C
12. Which of the following theory explains the origin of coral reefs and atolls?
A. Sliding continental theory
B. Elastic rebound theory
C. Continental drift theory
D. Glacial control theory
Ans-D
13. Which one of the following is not a cold current?
A. Falkland
B. California
C. West Australia
D. Agulhas
Ans-D
14. Which one of the following trench is not located in the Pacific Ocean?
A. Mariana
B. Tonga
C. Sunda
D. Aleutian
Ans-C
15. Which one of the following is a warm current?
A. Peruvian current
B. Canaries current
C. Benguela current
D. Brazil current
Ans-D
16. Which one of the following does not enjoy the Mediterranean type of climate?
A. California
B. Cyprus
C. Bolivia
D. Algeria
Ans-C
17. Of the following west European countries the only one with coastlines on three seas is:-
A. Portugal
B. Belgium
C. Spain
D. France
Ans-D
18. Which of the following theories of the formation of coral reefs and atoll was postulated by Darwin?
A. Glacial control theory
B. Subsidence theory
C. gland still theory
D. composite theory
Ans-B
19. The density of sea water increases if:-
A. depth and concentration of salt both decrease
B. depth and concentration of salt both increase.
C. depth decreases but concentration of salt increases.
D. depth increases but concentration of salt decreases.
Ans-B
20. Stationary wave theory is related to the origin of:-
A. tides
B. the earth
C. continents
D. coral reefs
Ans-A
21. Which of the following is not a warm current?
A. N.E. monsoon current
B. California current
C. Agulhas current
D. East Australian current
Ans-B
22. The important ocean resource for iodine and potash is:-
A. Green algae
B. Red algae
C. Brown algae
D. Blue-green algae
Ans-C
23. Identify the correct sequence of the amount of the following minerals present in ocean water in descending order using the code given below:-
Minerals
1. Magnesium chloride
2. Sodium chloride
3. Magnesium sulphate
4. Calcium sulphate
Codes:-
A. 1 2 3 4
B. 2 3 1 4
C. 4 1 2 3
D. 2 1 3 4
Ans-D
24. Assertion (A): Pisciculture has shown phenomenal growth in monsoon Asia
Reason (R): Monsoon Asia countries are the leading exporters of fish
Select the answer from the following code:-
Codes:-
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 the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Ans-D
25. On the basis of international trade, the most important ocean route is:-
A. Atlantic Ocean, Mediterranean Sea, Indian ocean via Suej Canal.
B. Atlantic ocean, Indian Ocean via cape of Good Hope.
C. North Atlantic route between Europe and North America.
D. Western coast of North America- Europe route via Panama Canal.
Ans-C
26. Assertion (A): Mid Oceanic ridges are the nuclei of future continents.
Reason (R): There has been divergent movement of plates along mid-oceanic ridges.
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 the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Ans-B
27. Which of the following is not correctly matched?
A. Aleutian trench –– North Pacific
B. Tonga trench — South Pacific
C. Puerto Rico trench — South Atlantic
D. Sunda trench — Indian Ocean
Ans-C
28. Which of the following pairs are correctly matched?
1. Oyeshio:- South Pacific
2. Falkland:- South Atlantic Current
3. Mozambique:- Indian Ocean Current
4. Labrador: -North Pacific current
Codes:
A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 1 and 4
Ans-B
29. Which of the following pair of factors is responsible for a lag of 58 minutes in two direct tides on the earth’s ocean surface?
1. Earth’s rotation
2. Earth’s revolution
3. Moon’s rotation
4. Moon’s revolution
Codes:-
A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 1 and 4
Ans-D
30. Study the following statements about the mid-oceanic ridges and select the correct answer using the code given below:-
1. Mid oceanic ridges are zones of linear.
2. These are given to the upwelling of lava.
3. Convection currents converge under the mid-oceanic ridges.
4. Seafloor spreading starts from this zone.
Codes:-
A. 1 and 2 are correct
B. 2, 3 and 4 are correct
C. 1, 2 and 4 are correct
D. 1, 3 and 4 are correct
Ans-C
31. The only European country with coastlines on the Atlantic ocean, mediterranean sea and the North Sea is:-
A. Portugal
B. Belgium
C. Spain
D. France
Ans-D
32. Which of the following occur more frequently?
A. Hurricanes
B. Willy willies
C. Tornado
D. Typhoons
Ans-A
33. A long wall built on the beach that crosses shoreline at right angles for the protection of the shoreline against erosion is termed as:-
A. Sea wall
B. Groyne
C. Dockyard
D. Harbour
Ans-B
34. The shallow waters of the continental shelves are rich grounds. An example of such an area is:-
A. Black Sea
B. Caspian Sea
C. Bass Strait
D. North Sea
Ans-D
35. Along the coasts salinity is:-
A. lowered
B. increased
C. stable
D. unaffected
Ans-A
36. OTEC power plants can be only located in:-
A. Temperate region
B. Subtropical zone
C. Tropical region
D. Polar zone
Ans-C
37. The desalination plant in India is located at:-
A. Kavaratti
B. Chennai
C. Minicoy
D. Diu
Ans-B
38. The most common method of desalination in the world is:-
A. Flash distillation
B. Electrodialysis
C. Reverse osmosis
D. Heating
Ans-C
39. The uprush of the tidal waves of certain height through the river mouth is called:
A. Seiches
B. Tsunamis
C. Springtide
D. Tidal bore
Ans-D
40. High sea tides occur after an interval of:-
A. 14 days
B. 12 hours 26 minutes
C. 6 hours and 2 minutes
D. 4 hours and 6 minutes
Ans-B
41. Equatorial spring tides occur at an interval of:-
A. 12 and a half hours
B. 6 hours
C. 6 months
D. 12 months
Ans-D
42. Which one of the following ocean currents is popularly known as the warm planet of Europe?
A. Gulf stream
B. Agulhas currents
C. East Australian current
D. Falkland current
Ans-A
43. Spring tides occur on full moon and new moon days because:-
A. moon and earth at right angle
B. sun and moon are at right angles
C. sun, earth and moon are in a straight line
D. sun and earth are at right angle
Ans-C
44. Neap tides are smaller because:-
A. the moon’s gravitational force is less
B. the sun and the moon do not act together.
C. the gravitational attraction of sun and moon tend to cancel each other.
D. it takes place at night.
Ans-C
45. A tidal period is:-
A. 12 hour duration period during which high tide and low tide come
B. duration between the high and the low tide
C. 12 hour 26 minutes period between successive high and low tide
D. duration between two successive crests
Ans-C
46. The periodic appearance of warm water off the Peruvian coast due to the suppression of trade winds is called:-
A. Humboldt current
B. Cromwell current
C. Under toe
D. None of these
Ans-D
47. Sinking of oceanic water is caused by its increased density. At which of the following latitudes will sinking occur:-
A. 0°
B. 40°
C. 60°
D. 90°
Ans-D
48. In the lower latitude warm currents blow on:-
A. the western shore
B. the eastern shore
C. both A and B
D. none of these
Ans-B
49. Match the following:- Currents Oceans
(a) Falkland current 1. warm current
(b) Norwegian 2. cold current current
(c) Florida current 3. West coast of the U.S.A.
(d) Okhotsk current 4. Atlantic Ocean
(e) British columbia 5. West Coast of current Kamachatka Peninsula.
Codes:-
(a) (b) (c) (d) (e)
A. 2 4 1 5 3
B. 2 1 4 5 3
C. 1 2 3 4 5
D. 4 2 5 3 1
Ans-A
50. Cobot current is the branch of:-
A. Labrador current
B. N. equatorial current
C. Bengula current
D. Brazilian current
Ans-A