• INDIAN POLITY FOR CIVIL SERVICES EXAMINATIONS
  • Indian Culture for Prelims Preparation
  • Environment and Ecology
  • Economics
  • Geography
  • Science & Technology
  • Indian History
  • Current Affairs

Ocean

  1. Distribution
  2. Circulation
  • NCERT- Fundamentals of Physical Geography- Class XI- Chapters  13 & 14
  • Certificate Physical and Human Geography- Goh Cheng Leong-Chapters 11, 12

[2012 Prelims]

1)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?

a) 1 and 2only

b) 1,2 and 3 only

c) 1 and 4

d) 2, 3 and 4.

[2013 Prelims]

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

(a) is found in atmosphere as moisture and clouds

(b) is found in freshwater lakes and rivers

(c) exists as groundwater

(d) exists as soil moisture

2)The most important fishing grounds of the world are found in the regions where

(a) warm and cold atmospheric currents meet

(b) rivers drain out large amounts of freshwater into the sea

(c) warm and cold oceanic currents meet

(d) continental shelf is undulating

[2015 Prelims]

1)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 code given below.

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

2)In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?

(a) Sea surface temperatures are low

(b) Inter-Tropical Convergence Zone seldom occurs

(c) Coriolis force is too weak

(d) Absence of land in those regions

3)What explains the eastward flow of the equatorial counter-current?

(a) The Earth’s rotation on its axis

(b) Convergence of the two equatorial currents

(c) Difference in salinity of water

(d) Occurrence of the belt of calm near the equator 

[2017 Prelims]

1)  With reference to ‘Indian Ocean Dipole (IOD)’ sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/are correct?

  1. IOD phenomenon is characterised by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean.
  2. An IOD phenomenon can influence an El Nino’s impact on the monsoon.

Select the correct answer using the code given below:

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

Answer: B