OCEANOGRAPHY 90 Important MCQS Part 4 FOR NTA UGC NET
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Q.46. Spring and Neap Tides
(A) Are tides with great tidal range
(B) Occur during the full and new moon
(C) Are tides with minimum tidal range
(D) Are common during the first and third phase of the moon
Answer: A
Explanation:
Spring Tides:
During full moon and new moon days. The sun, moon, and earth are the same line and tides are highest.
Neap Tides:
When the moon is the first and last quarter, ocean water gets diagonally opposite direction resulting in low tides. These are called neap tides.
Q.47. The Socotra Island is situated in
(A) Indian Ocean
(B) Pacific Ocean
(C) Atlantic Ocean
(D) Arctic Ocean
Answer: A
Explanation:
Q.48. The density of sea water depends upon
(A) Temperature
(B) Salinity
(C) Pressure
(D) All of the above
Answer: D
Explanation:
Q.49. A Shallow stretch of seawater partly on completely separated from the open ocean by a reef is called
(A) Atoll
(B) Strait
(C) Tombolo
(D) Lagoon
Answer: D
Explanation:
A lagoon is a body of water separated from larger bodies of water by a natural barrier.
Lagoons are separated from larger bodies of water by sandbars, barrier reefs, coral reefs, or other natural barriers. The word “lagoon” derives from the Italian word laguna, which means “pond” or “lake.”
Q.50. Seiche is a type of
(A) Marine Organism
(B) A Wave
(C) A Sea Bird
(D) A Marine Animal
Answer: B
Explanation:
A seiche is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbours and seas. The key requirement for formation of a seiche is that the body of water be at least partially bounded, allowing the formation of the standing wave.
The term was promoted by the Swiss hydrologist F.A. Forel in 1890, who was the first to make scientific observations of the effect in Lake Geneva.
Q.51. The Guam is an Island in Micronesia which lies on
(A) Atlantic Ocean
(B) West Indies
(C) Indian Ocean
(D) Pacific Ocean
Answer: D
Explanation:
Q.52. Coral reefs are normally found between
(A) 15°N to 25°S latitudes
(B) 30°N to 30°S latitudes
(C) 25°N to 25°S latitudes
(D) 15°N to 15°S latitudes
Answer: C
Explanation:
Q.53. What is the ideal temperature required for survival of coral reefs
(A) 20°C to 21°C
(B) 18°C to 19°C
(C) 21°C to 22°C
(D) 22°C to 23°C
Answer: A
Explanation:
Q.54. Salinity in water bodies increase with
(A) Increase in evaporation and increase in admixture of fresh water
(B) Decrease in evaporation and no change in admixture of fresh water
(C) Decrease evaporation and increase in admixture of fresh water
(D) Increase in evaporation and decrease in admixture of fresh water
Answer: D
Explanation:
Q.55. The general depth of Abyssal Plains varies between
(A) 1000- 6000 metres
(B) 2000- 6000 metres
(C) 3000-6000 metres
(D) 4000-6000 metres
Answer: C
Explanation:
Q.56. The wave-cut platform is found in
(A) California Coast
(B) Hokkaido Coast
(C) Madagascar Coast
(D) Malabar Coast
Answer: A
Explanation:
Q.57. Match List-I with List-Il and select the correct answer from the codes given below
| List-I
(Oceans) |
List-II
(Currents) |
| A. Indian | 1. El-Nino |
| B. North Pacific | 2. Kuroshio |
| C. South Pacific | 3. Monsoon Drift |
| D. Atlantic | 4. Gulf Stream |
Code:
| A | B | C | D | |
| A. | 4 | 3 | 2 | 1 |
| B. | 3 | 2 | 1 | 4 |
| C. | 1 | 4 | 3 | 2 |
| D. | 2 | 1 | 4 | 3 |
Answer: B
Explanation:
Q.58. The first marine sanctuary in India, having its bounds coral reefs, mollusca, dolphins, tortoise and various kinds of sea birds, has been established in
(A) Sundarbans
(B) Chilka Lake
(C) Gulf of Kutch
(D) Lakshadweep
Answer: C
Explanation:
The Gulf of Kutch is the first marine sanctuary in India having bound with corals reefs, dolphins, tortoises, and sea birds. while Lakshwadeep is the first marine conservation reserve coming up. The Chilka lake being the first marine park India. The sunderban is the tiger reserve national park and not a marine national park.
Q.59. Which one of the following sea is without a coast line?
(A) White Sea
(B) Sea of Okhotsk
(C) Saragossa Sea
(D) Tasmania Sea
Answer: C
Explanation:
Q.60. Diamond Harbour and Salt Lake City are situated in
(A) California
(B) Florida
(C) Hong Kong
(D) Kolkata
Answer: D
Explanation: