1. Air --------- when heated and gets ------ when cooled.
a) expands, compressed
b) compressed, expands
c) expands, expands
d) compressed, compressed
Answer. a) expands, compressed
2. The --------- redistributes the heat and moisture across the planet, thereby, maintaining a constant temperature for the planet as a whole.
a) Ocean current
b) Wind
c) temperature
d) Insolation
Answer. b) Wind
3. The weight of a column of air contained in a unit area from the mean sea level to the top of the atmosphere is called the ---------.
a) Wind pressure
b) Insolation
c) Gravity
d) atmospheric pressure
Answer. d) atmospheric pressure
4. What is the unit of atmospheric pressure?
a) candela
b) cubic meter
c) square meter
d) millibar
Answer. d) millibar
5. At sea level the average atmospheric pressure is --------- millibar.
a) 1013.2
b) 10130.2
c) 1017.2
d) 10170.2
Answer. a) 1013.2
6. ------- are lines connecting places having equal pressure
a) Isotherm
b) Isobars
c) sea level
d) top of the stratosphere
Answer. b) Isobars
7. Near the equator the sea level pressure is ---------- and near the poles the pressure is --------.
a) low, high
b) high, low
c) low, low
d) high, high
Answer. a) low, high
8. Consider the following statements-
1. the pressure gradient force
2. the frictional force
3. the Coriolis force
Which of the above forces affect the direction and velocity of wind?
a) 1 only
b) 1 and 2 only
c) 1 and 3 only
d) 1,2, and 3 only
Answer. d) 1,2, and 3 only
9. Coriolis force deflects the wind to the-------- direction in the northern hemisphere and to the ------ in the southern hemisphere.
a) left, right
b) right, left
c) right, right
d) left, left
Answer. b) right, left
10. Why tropical cyclones are not formed near the equator.
a) because of zero Coriolis force
b) because of the very high Coriolis force
c) because of the very high upward movement of air
d) because of the presence of ITCZ (Intertropical convergence zone) at the equator.
Answer. a) because of zero Coriolis force
11. When isobars are straight and when there is no friction, the pressure gradient force is balanced by the Coriolis force and the resultant wind blows parallel to the isobar. This wind is known as the -------.
a) local wind
b) permanent wind
c) seasonal wind
d) geostrophic wind
Answer. d) geostrophic wind
12. The wind circulation around a low is called ------- circulation and around a high, it is called -------- circulation.
a) cyclonic, anti-cyclonic
b) anti-cyclonic, cyclonic
c) anti-cyclonic, tornado
d) cyclonic, tornado
Answer. a) cyclonic, anti-cyclonic
13. Consider the following statements-
1. latitudinal variation of atmospheric heating;
2. the emergence of pressure belts;
3. the migration of belts following the apparent path of the sun;
4. the distribution of continents and oceans;
5. the rotation of the earth;
Which of the above affects the pattern of planetary wind circulations?
a) 1, 3, and 5 only
b) 2,4, and 5 only
c) 1,2,3, and 4 only
d) 1,2,3,4, and 5
Answer. d) 1,2,3,4, and 5
14. Hadley Cells in atmospheric circulation found in between
a) Equator and 30 degrees S/N
b) 30 degrees S/N and 60 degrees N/S
c) 60 degrees N/S to poles
d) None
Answer. a) Equator and 30 degrees S/N
15. Ferrel cells in atmospheric circulation found in between
a) Equator and 30 degrees S/N
b) 30 degrees S/N and 60 degrees N/S
c) 60 degrees N/S to poles
d) None
Answer. b) 30 degrees S/N and 60 degrees N/S
16. The warm water of the central Pacific Ocean slowly drifts towards the South American coast and replaces the cool Peruvian current. Such appearance of warm water off the coast of Peru is known as the -------------.
a) El Nino
b) ENSO
c) La Nina
d) Southern oscillation (SO)
Answer. a) El Nino
17. The El Nino event is closely associated with the pressure changes in the Central Pacific and Australia. This change in pressure conditions over the Pacific is known as the ------------.
a) El Nino
b) ENSO
c) La Nina
d) Southern oscillation (SO)
Answer. d) Southern oscillation (SO)
18. The combined phenomenon of southern oscillation and El Nino is known as --------.
a) El Nino
b) ENSO
c) La Nina
d) Southern oscillation (SO)
Answer. b) ENSO
19. The cool air, of the high plateaus and ice fields, draining into the valley is called --------- wind.
a) katabatic
b) adiabatic
c) mountain wind
d) Valley breeze
Answer. a) katabatic
20. In mountainous regions, during the day the slopes get heated up and air moves upslope to fill the resulting gap the air from the valley blows up the valley. This wind is known as---------.
a) katabatic
b) adiabatic
c) mountain wind
d) Valley breeze
Answer. d) Valley breeze
21. In mountainous regions, during the night the slopes get cooled and the dense air descends into the valley as the -------------.
a) katabatic
b) adiabatic
c) mountain wind
d) Valley breeze
Answer. c) mountain wind
22. The moisture of winds, while crossing the mountain ranges condenses and precipitates. When it descends down the leeward side of the slope the dry air gets warmed up by the ------------ process.
a) katabatic
b) adiabatic
c) cooling
d) heating
Answer. b) adiabatic
23. When the air remains over a homogenous area for a sufficiently long time, it acquires the characteristics of the area. The air with distinctive characteristics in terms of temperature and humidity is called an ----------.
a) geographical region
b) airmass
c) source region
d) destination region
Answer. b) airmass
24. When two different air masses meet, the boundary zone between them is called a -----
a) front
b) frontogenesis
c) source region
d) destination region
Answer. a) front
25. When the cold air moves towards the warm air mass, its contact zone is called the ---- front.
a) Warm
b) Cold
c) Stationary
d) Occluded
Answer. b) Cold
26. If the warm air mass moves towards the cold air mass, the contact zone is a --------- front.
a) Warm
b) Cold
c) Stationary
d) Occluded
Answer. a) Warm
27. If an air mass is fully lifted above the land surface, it is called the ----------- front.
a) Warm
b) Cold
c) Stationary
d) Occluded
Answer. d) Occluded
28. Which of the following is not a correct difference between tropical cyclones and extratropical cyclones?
a) The extra tropical cyclones have a clear frontal system which is not present in tropical cyclones.
b) The extra tropical cyclones cover a larger area and can originate over the land and sea. Whereas tropical cyclones originate only over the seas.
c) The extra tropical cyclones move from east to west but tropical cyclones, move from west to east.
d) The extratropical cyclone affects a much larger area as compared to the tropical cyclone.
Answer. c) The extra tropical cyclones move from east to west but tropical cyclones, move from west to east.
29. Which of the following is not correctly matched.
(Origin ocean)-( name of cyclone)
a) Indian Ocean-Tufaan
b) Atlantic Ocean - Hurricanes
c) Western Pacific and South China Sea- Typhoons
d) Western Australia - Willy-willies
Answer. a) Indian Ocean-Cyclone( not Tufaan)
30. Which of the following is not a favorable condition for the formation and intensification of a tropical cyclone.
a) Large sea surface with a temperature higher than 27° C.
b) Presence of the Coriolis force.
c) Large variations in the vertical wind speed.
d) A pre-existing weak low-pressure area and upper divergence above the sea level system.
Answer. c) Small ( not large) variations in the vertical wind speed.
31. If the surface air pressure is 1,000 millibar, the air pressure at 1 km above the surface will be:
a) 700 millibar
b) 1,100 millibar
c) 900 millibar
d) 1,300 millibar
Answer. c) 900 millibar; The decrease amounts to about 1 millibar for each 10 m increase in elevation
32. The Inter Tropical Convergence Zone normally occurs:
a) near the Equator
b) near the Tropic of Cancer
c) near the Tropic of Capricorn
d) near the Arctic Circle
Answer. a) near the Equator
33. The direction of wind around low pressure in the northern hemisphere is:
a) clockwise
b) perpendicular to isobars
c) anti-clockwise
d) parallel to isobars
Answer. c) anti-clockwise
The direction of wind around low pressure in the northern hemisphere is anti-clockwise.
34. Which one of the following is the source region for the formation of air masses?
a) the Equatorial forest
c) the Siberian Plain
b) the Himalayas
d) the Deccan Plateau
Answer. c) the Siberian Plain is the source region for the formation of air masses.
35. As a result of global warming the frequency and severity of which of the following are increasing due to global warming? (UPPSC 2018)
a) Cyclones only
b) Storms only
c) Hurricanes only
d) All of the above
Answer. d
36. In the South Atlantic and In South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason? (UPSC 2015)
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
Answer. a) Sea surface temperatures are low
37. Consider the following statements: (UPSC 2020)
1. Jet streams occur in the Northern Hemisphere only.
2. Only some cyclones develop an eye.
3. The temperature inside the eye of a cyclone is nearly 10°C less than that of the surroundings.
Which of the statements given above is/are correct?
a) 1 only
b) 2 and 3 only
c) 2 only
d)1 and 3 only
Answer. c) 2 only; The temperature inside the eye of a cyclone is nearly 10°C warmer ( not lesser ) than that of the surroundings.
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