Which one of the following winds fall in the Zone of Hadley Cell ?

• Monsoon winds

• Trade winds

• Westerlies

• Polar winds

Which one of the following is correct , when the combined effect of the pressure gradient force and coriolis force on air current produces ?

• Deflection force

• Geostrophic force

• Frictional force

• Gravitational force

The term adiabatic change of temperature stands for 

• Fall of temperature after precipitation

• Heating and cooling of an ascending or descending air through compression of expansion

• Heating of ascending air

• Cooling of descending air

What are the effects of the low level temperature inversion occuring in cool nights over the urban areas ?

(a) Entrapment of pollutants causing heavily smog

(b) Pleasant weather conditions 

(c) Unusually unstable air

(d) Unusually stable air

• (a) and (c)

• (b) and (c)

• (a) and (d)

• (b) and (d)

The "Ice Crystal Theory" related to precipitation was propounded by

• Boven

• Muir

• Peterson

• Bergeron

Energy that is reflected by the atmosphere

• does not heat the atmosphere

• has a different wavelength than the incoming energy

• is usually short energy like visible light which does not penetrate the atmosphere.

• heats the atmosphere by absorption

Which one of the following statements about the polar jet stream is not true ?

• It moves northwards during summer

• It supplies energy to the circulation of surface storms

• Its location roughly coincides with that of the polar front.

• Its velocity is greater during summer.

148.

Th eprcentage of water vapour in the air in the tropical regions may be as high as

• 4%

• 10%

• 30%

• 50%

The vertical air flow in an anticyclone results in

• diversion aloft

• conversion aloft

• diversion both aloft and at the surface

• convergence at the surface and divergence aloft

In the hydrological cycle evaporation is preceded by

• Clouds

• Precipitation

• Heat

• Condensation