Wind Circulation and — 9 World Geography PYQs with Answers | UKPSC PYQ Hub

Question 1

When the Coriolis effect is counter balanced by the pressure gradient force, the resulting wind is termed as:

Accepted Answer

Geostrophic winds. When the coriolis effect is offset by the pressure gradient force, the resulting wind is knows as geostrophic wind. The rotation of the Earth on its axis affects the direction of winds. The force that bends or deflects the direction of winds flowing in the horizontal direction is called deflection force or coriolish force.

Question 2

Dry winds blowing from north-east and east to west of Sahara desert are known as:

Accepted Answer

Harmattan. The hot and dry winds the blow from north- east and east to west in the eastern part of the Sahara Deserts are called 'Harmattan'. The western coast of Africa is hot and humid due to which people living in these area remain dull and lazy. But with the arrival of Harmattan, the weather becomes pleasant and healthy due to which it is also known as 'Doctor winds'. Geography of the World

Question 3

Which of the following is not type of wind?

Accepted Answer

Riss. Khamsin is a very dry, hot and sandy wind that blows with great speed from South to South east affecting Egypt and eastern countries surrounding. The Mediterranean sea. Loo is a strong, dusty hot and dry summer wind from the west which blows ones the Indo Gangetic plain region in North India and Pakistan. Blizzard is a cold violet polar wind which blows in Northern and Southern and Southern Polar regions like Siberia, Canada, the U.S. Riss is not a wind it is a glacier.

Question 4

The region characterised by Calm/weak winds is called?

Accepted Answer

Doldrums. The region characterized by Calm / weak winds is called Doldrums. The doldrums is a nautical word for the belt around the earth above the equator where sailing ships will stuck in windless waters. Low atmosphere pressure and a lack of substantial wind characterize the region. Doldrum exist only north of the equator, but the effect can be felt anywhere from 5º north to 5º south. Doldrum are situated in the Pacific and Atlantic Ocean regions with little winds.

Question 5

The cause of wind to deflect towards left in Southern hemisphere is-

Accepted Answer

Rotation of the Earth. Because of rotation of the Earth on its axis, circulating air deflect towards left in southern Hemisphere and towards right in Northern Hemisphere. This deflection is known as Coriolis effect.

Question 6

Normal atmospheric pressure is ________.

Accepted Answer

76 cm of Hg Nm–2. Normal atmospheric pressure is 76 cm of Hg.

Question 7

Clouds are the result of

Accepted Answer

Condensation. Clouds are the result of condensation. Clouds are created when water vapor turns into liquid water droplets. These water droplets form on tiny particles, like dust, that are floating in the air. The process of water changing from a gas to a liquid is called condensation. Condensation happens with the help of tiny particles floating around in the air, such as dust, salt crystals from sea spray, bacteria or even ash from volcanoes. Those particles provide surfaces on which water vapor can change into liquid droplets or ice crystals.

Question 8

Cyclones occurring in North Atlantic Ocean is known as:

Accepted Answer

Hurricanes. Hurricane mainly originates in the Atlantic ocean near equator over warm ocean water and moves around the western island.