UPSC Prelims PYQs – Oceanography (Geography)

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

1. OMT is measured up to a depth of 26ºC isotherm which is 129 meters in the south-western Indian Ocean during January-March.
2. OMT collected during January-March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean.

Select the correct answer using the code given below:

[UPSC Civil Services Exam – 2020 Prelims]

2. What explains the eastward flow of the equatorial counter-current?

[UPSC Civil Services Exam – 2015 Prelims]

3. Tides occur in the oceans and seas due to which among the following

1. Gravitational force of the Sun
2. Gravitational force of the Moon
3. Centrifugal force of the Earth

Select the correct answer using the codes given below.

[UPSC Civil Services Exam – 2015 Prelims]

4. On the planet earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion:

[UPSC Civil Services Exam – 2013 Prelims]

5. The acidification of oceans is increasing. Why is this phenomenon a cause of concern?

1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected.

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

[UPSC Civil Services Exam – 2012 Prelims]

6. Consider the following factors:

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

Which of the above factors influence the ocean currents?

[UPSC Civil Services Exam – 2012 Prelims]

7. The most important fishing grounds of the world are found in the regions where

[UPSC Civil Services Exam – 2013 Prelims]