Daily Static MCQs for UPSC & State PSC Exams - Geography (14 June 2023)

Daily Static MCQs Quiz for UPSC, IAS, UPPSC/UPPCS, MPPSC. BPSC, RPSC & All State PSC Exams

Subject : Geography

1. Consider the following statements:

1. Tsunamis have very short wavelength and high amplitude in the deep sea.
2. As the tsunamis reach the coast, their wavelength increases and amplitude decreases.

Which of the above statement(s) is/are correct?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Answer: (D)

Explanation:

  • In the deep sea, tsunamis have very long wavelength which often exceeds 500–700 km. But their amplitude is very low and rarely exceeds 1 meter. Hence, statement 1 is incorrect.
  • However, on reaching coast, wavelength of tsunamis is reduced considerably and their amplitude increase to 10–30 Meters. Hence, statement 2 is also incorrect.

2. Consider the following factors:

1. Rotation of earth
2. Air pressure and wind
3. Density of ocean water
4. Revolution of the earth

How many of the above factors influence the ocean currents?

(a) Only one
(b) Only two
(c) Only three
(d) All four

Answer: (C)

Explanation: Ocean current is a continuous, directed movement of sea water generated by forces such as rotation of the earth, wind, temperature and salinity difference, air pressure, sea water density difference etc. Revolution of earth does not influence the ocean currents. Hence, option (c) is correct.

3. Which of the following statements is incorrect?

(a) Temperature of the ocean water increases with depth as we find increase in temperature with increasing depth within the earth.
(b) Temperature differences play a vital rule in controlling the movements of ocean water.
(c) Differential thermal conditions of the ocean water influence the general atmospheric conditions and control the planetary wind belts.
(d) Ocean water temperature has moderating effect on weather conditions of coastal areas.

Answer: (A)

Explanation: Temperature is highest at the sea surface because the sun’s rays give maximum heat energy to the surface. The effect of the sun’s rays decreases with increasing depth which results in lower temperature as the depth increases. Hence, statement (a) is incorrect.

4. Consider the following pairs:

1. Brazil Current: South Atlantic Ocean
2. Humboldt Current: North Pacific Ocean
3. Gulf Stream: North Atlantic Ocean
4. Agulhas Current: Indian Ocean

How many pairs are incorrectly matched?

(a) Only one pair
(b) Only two pairs
(c) Only three pairs
(d) All four pairs

Answer: (A)

Explanation:

The correct match in of the pairs is given below:

  1. Brazil Current: South Atlantic Ocean
  2. Humboldt Current: Southeast Pacific Ocean
  3. Gulf Stream: North Atlantic Ocean
  4. Agulhas Current: Indian Ocean

5. Consider the following statements regarding Pacific Ring of Fire:

1. It is the most seismically active region of world where about 90% of world's earthquakes occur.
2. It is a result of plate tectonics that is, the movement and collisions of lithosphere plates.
3. The active seismic region of Indian Himalayas also considered as part of Pacific Ring of Fire.
4. Also, the areas around Pacific Ring of Fire are intensely active for volcanic activities.

How many statements given above are correct?

(a) Only one
(b) Only two
(c) Only three
(d) All four

Answer: (C)

Explanation: The ring of fire is a direct result of plate tectonics. It is a major area in the basin of Pacific ocean where large number of earthquakes and volcanic eruptions occur. It has more than 75% of world’s active and dormant volcanoes and about 90% of world’s earthquake occurs along this ring. The next most seismically active region is the Alpide belt which extends from Java to northern Atlantic ocean via the Himalayas. Hence, Indian Himalayas are not considered as part of Pacific Ring of Fire. Hence, statement 3 is incorrect.