Planetary Winds NDA Questions

Planetary Winds MCQ Questions

7.
The 'Polar Easterlies' are cold, dry planetary winds that blow from the polar high pressure belts towards the subpolar low pressure belts, generally blowing from the:
A.
South towards the north exclusively, with no easterly component
B.
West towards the east
C.
East towards the west
D.
Equator towards the poles
ANSWER :
C. East towards the west
8.
The apparent deflection of winds (and other moving objects) due to the Earth's rotation, causing winds to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, is known as the:
A.
Ferrel's Law (a related concept describing the same phenomenon)
B.
Coriolis Effect (Force)
C.
Buys Ballot's Law (a related but distinct principle)
D.
Doppler Effect
ANSWER :
B. Coriolis Effect (Force)
9.
Ferrel's Law, closely related to the Coriolis effect, states that winds are deflected to their right in the Northern Hemisphere and to their left in the Southern Hemisphere, due to the:
A.
Presence of mountain ranges
B.
Earth's rotation on its axis
C.
Gravitational pull of the moon
D.
Ocean currents
ANSWER :
B. Earth's rotation on its axis
10.
The equatorial belt characterised by calm, light, and variable winds, associated with the rising air of the Equatorial Low pressure zone, is commonly known as the:
A.
Doldrums
B.
Roaring Forties
C.
Furious Fifties
D.
Horse Latitudes
ANSWER :
A. Doldrums
11.
The subtropical belt, located around 30 degrees North and South latitude, characterised by calm winds and descending, stable air, historically associated with sailing ships being becalmed, is known as the:
A.
Trade Wind Belt
B.
Horse Latitudes
C.
Doldrums
D.
Roaring Forties
ANSWER :
B. Horse Latitudes
12.
The strong, persistent westerly winds found in the Southern Hemisphere between approximately 40 and 50 degrees South latitude, known for their considerable strength due to the vast uninterrupted ocean expanse, are commonly called the:
A.
Trade Winds
B.
Roaring Forties
C.
Doldrums
D.
Polar Easterlies
ANSWER :
B. Roaring Forties