Atmosphere (Composition, Layers) NDA Questions

NDA Physical Geography

Atmosphere (Composition, Layers) MCQ Questions


13.
Water vapour content in the atmosphere generally varies with latitude in which manner?
A.
It increases from the equator towards the poles
B.
It decreases from the equator towards the poles
C.
It is highest at the poles
D.
It remains constant across all latitudes
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ANSWER :
B. It decreases from the equator towards the poles
14.
Water vapour performs which of the following important functions in the atmosphere?
A.
It generates the Coriolis effect
B.
It increases atmospheric pressure permanently
C.
It absorbs ultraviolet radiation completely
D.
It acts like a blanket, preventing the Earth from becoming too cold or too hot
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ANSWER :
D. It acts like a blanket, preventing the Earth from becoming too cold or too hot
15.
Which of the following is NOT typically a source of dust particles in the atmosphere?
A.
Ozone molecules
B.
Sea salts
C.
Disintegrated particles of meteors
D.
Smoke-soot and ash
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ANSWER :
A. Ozone molecules
16.
Dust particles in the atmosphere are generally concentrated in:
A.
The mesosphere
B.
The upper stratosphere
C.
The exosphere
D.
The lower layers of the atmosphere
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ANSWER :
D. The lower layers of the atmosphere
17.
A higher concentration of dust particles is generally found in which regions, as compared to equatorial and polar regions?
A.
Equatorial regions only
B.
Polar regions only
C.
Subtropical and temperate regions (due to dry winds)
D.
Oceanic regions only
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ANSWER :
C. Subtropical and temperate regions (due to dry winds)
18.
Dust and salt particles in the atmosphere play which important role in cloud formation?
A.
They increase the temperature of the troposphere
B.
They absorb terrestrial radiation directly
C.
They reflect ultraviolet rays
D.
They act as hygroscopic nuclei around which water vapour condenses
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ANSWER :
D. They act as hygroscopic nuclei around which water vapour condenses