1. Troposphere is the hottest part of the atmosphere because [SSC Grad 2011]
Correct : C. it is heated by the Earth's surface
2. Which one among the following statements relating to a cyclone is not correct? [Asstt Commdt 2011]
Correct : C. Wind movement towards the low pressure centre of a cyclone is clockwise in the northern hemisphere
3. Which one among the following forces is most powerful in determining movement of
wind including its velocity ? [Asstt Commdt 2011]
Correct : D. Pressure gradient force
4. Which one among the following local winds is not characteristically hot and dry? [Asstt Commdt 2011]
Correct : B. Mistral
5. Relative humidity [Asstt Commdt 2011]
Correct : B. decreases with increased temperature
6. The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1. There are no clouds or water vapour in the lower stratosphere. 2. There are no vertical winds in the lower stratosphere. Which of the statements given above is/are correct in this context? [CSAT 2011]
Correct : C. Both 1 and 2
7. Westerlies in southern hemisphere are stronger and persistent than in northern
hemisphere. Why? 1. Southern hemisphere has less landmass as compared to northern hemisphere. 2. Coriolis force is higher in southern hemisphere as compared to northern hemisphere. Which of the statements given above is fare correct? [CSAT 2011]
Correct : A. 1 only
8. A layer in the Earth's atmosphere called Ionosphere facilitates radio communication.
Why? 1. The presence of ozone causes the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength. Which of the statements given above is fare correct? [CSAT 2011]
Correct : D. Neither 1 nor 2
9. Consider the following statements about anticyclones: (1) The winds are divergent, and spiral out from the centre of high pressure (2) The air moves clockwise in the Northern Hemisphere and anticlockwise in Southern Hemisphere (3) It is accompanied by heavy rainfall (4) A sudden rise in barometric reading heralds the approach of anticyclone Which of these statements are correct?
Correct : D. 1, 2 and 4
10. Which one of the following statements is correct? [IAS 2004]
Hurricanes:
Correct : C. develop over warm ocean areas
11. The instrument used for measuring relative humidity in air is :
Correct : A. hygrograph
12. Atmospheric humidity is measured by: [NDA 1994]
Correct : A. Psychrometer
13. Frontal rain is caused by:
Correct : C. cyclonic activity
14. A sudden fall in the barometric reading indicates:
Correct : B. storm
15. Relative humidity of the atmosphere is directly affected by :
Correct : B. change in atmospheric temperature
16. A type of rainfall which occurs when wind rises up along a hill or mountain barrier is
called: [NDA 2004]
Correct : D. orographic
17. The form of precipitation in which the raindrops get frozen into ice on coming in contact with a cold layer of air near the earth's surface is called:
Correct : C. sleet
18. Choose the incorrect statement:
Correct : C. Absolute humidity is expressed in grams per cubic metre of air
19. Precipitation takes place when:
Correct : B. temperature of moisture in air suddenly increases
20. Dew point is: [NDA 1991]
Correct : D. a temperature at which a given sample of air becomes saturated
21. ‘Cloud burst’ means:
Correct : A. abnormally heavy downpour of rain, associated with a thunderstorm
22. The amount of actual water vapour of air is known as: [NDA 1992]
Correct : A. absolute humidity
23. Water vapour beyond the dew point results in: [NDA 1994]
Correct : C. condensation
24. Which type of rainfall leads to the formation of the windward and the leeward side?
Correct : C. Orographic
25. Which of the following types of rainfall is often accompanied with lightning and
thunder?
Correct : B. Convectional
26. The contact of two air masses differing sharply in humidity originates: .[CDS 2001]
Correct : C. temperate cyclones
27. Wind in the Southern hemisphere is deflected towards left due to : [CDS 2001]
Correct : B. rotation of the earth
28. Smog is likely to occur: [CDS 2002]
Correct : D. near the industrial areas
29. Consider the following statements: 1. Troposphere varies in its thickness between equator and poles. 2. Stratosphere does not experience Normal Lapse Rate. 3. Ozone layer occurs in the Mesophere. 4. Ionosphere lies between Stratosphere and Mesosphere Which of these statements are correct? [NDA 2003]
Correct : A. 1 and 2
30. What do you understand by the term ‘Advection’ ?
Correct : B. Heat is transferred horizontally by both winds and ocean currents
31. Transfer of surplus heat from the lower latitudes to higher latitudes is done by : 1. ocean currents 2. planetary winds 3. tides 4. waves
Correct : A. I and II
32. Compared to other slopes in the northern hemisphere which is the warmest?
Correct : B. South facing
33. Which of the following is/are correct in matching the layer of atmosphere and its
characteristic ? 1. Troposphere : weather phenomena 2. Stratosphere : ozone layer 3. Ionosphere : radio waves reflected to earth's surface 4. Mesosphere : Aurorae
Correct : D. I, II and III
34. Freely moving bodies are:
Correct : A. deflected to their right in the northern hemisphere
35. Which of the following statements is not true of Trade Winds?
Correct : B. They are deflected to the right to become South-East Trades in the southern hemisphere
36. Which of the following is specially true of anticyclones in the southern hemisphere?
Correct : D. The air moves in an anti-clockwise direction
37. Which of the following is/are characteristic of a depression in the southern hemisphere? 1. It is a mass of air whose isobars form an oval or circular shape 2. Pressure is high in the centre and decreases towards the outside 3. Air moves anti-clockwise
Correct : A. I only
38. Which of the following are true with regard to temperature control of the atmosphere
of a given place? 1. The major temperature contrasts on earth's surface are between land masses and oceans 2. During night, the water surface cools more rapidly than the land surface 3. Temperature generally decreases with latitude on either side of the equator 4. Temperature rises to a maximum during summer and falls to a minimum during winter
Correct : A. I, III and IV
39. At low elevation which among the following clouds are to be found ?
Correct : B. Nimbus
40. Which of the following colour types do not indicate fair or fine weather?
Correct : D. Cumulonimbus
41. Which one among the following is a high cloud? [NDA 2003]
Correct : A. Cirrus
42. What is the correct sequence of the given clouds from low to high altitudes? [CDS 2001]
Correct : D. Cumulonimbus, Stratus, Cirrostratus, Cirrus
43. In the northern hemisphere, currents are deflected to their right due to :
Correct : B. coriolis force
44. Which one of the following is a type of planetary wind?
Correct : C. Westerlies
45. In the northern hemisphere, the wind blowing from the Horse latitudes to the Doldrums
is called: [NDA 1994]
Correct : B. Trade wind
46. Warm dry winds blowing down the east slopes of Rockies are known as : [NDA 1992]
Correct : D. Chinook
47. The monsoon has well-developed cycle in: [CDS 1992]
Correct : A. South and South East Asia
48. What is true with regard to Jet Streams? 1. High velocity winds 2. Blow from west to east 3. Blow in upper troposphere near the tropopause 4. Blow in the mesosphere
Correct : C. 1, 2 and 3
49. Anticyclones are caused by:
Correct : C. winds that blow spirally outwards from the centre
50. In the earth's atmosphere, the atmospheric pressure: [NDA 1991]
Correct : B. decreases with height
51. Which of the following statements about Stratosphere is incorrect?
Correct : C. It is not free from the violent weather changes occurring on the earth
52. The term used for the zone at low pressure and light and variable winds in the oceanic equatorial regions is :
Correct : A. depression
53. The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from:
Correct : D. ionosphere
54. ‘Temperate lows’ are:
Correct : D. sub-polar low pressure belts
55. Which of the following statements is wrong?
Correct : D. Roughly V-shaped isobar system with a low pressure at the centre represents a wedge
56. Countries favourably influenced by Westerlies are:
Correct : D. All of these
57. The hot and dry winds that help in the ripening of grapes in the Alps region is :
Correct : B. Foehn
58. 'Pampero' is :
Correct : A. a cold wind which prevails in Argentina and Uruguay
59. Which of the following winds is incorrectly paired with the area in which it prevails?
Correct : D. Hurricanes - New Zealand
60. The tropical cyclones-Hurricanes and Typhoons-develop and mature:
Correct : D. anywhere in the tropical zone
61. Which of the following is a cold wind?
Correct : A. Buran
62. The dry wind 'Santa Ana' blows in :
Correct : D. California
63. The portion of the atmosphere which extends from the earth's surface upto 6-8 miles and experiences decrease in temperature at constant rate is : [NDA 1990]
Correct : C. troposphere
64. Consider the following statements: 1. Mistral is a cold wind blowing in North America. 2. Sirocco is a hot dry wind blowing across the North African coast. Which of the statement(s) given above is/are correct? [IAS 2009]
Correct : B. 2 only
65. Local thunderstorms ‘Nor westers’ are prominent in :
Correct : B. West Bengal
66. When the relative humidity is 50 percent and air temperature is 30°C, a cooling of air mass: [NDA 1990]
Correct : C. decreases the relative humidity
67. Which of the following statements about convectional rainfall are true? 1. The areas of the world, having an equatorial type of climate, receive this kind of rainfall. 2. It is usually torrential and accompanied by thunder and lightning. 3. It is also known as 4 o'clock rain.
Correct : D. 1, 2 and 3
68. The dense mass of small water drops on smoke particles in the lower layers of the
atmosphere is :
Correct : A. smog
69. Cyclonic rainfall largely occurs in :
Correct : B. India
70. Which one of the following islands receives convectional rainfall ?
Correct : B. Sumatra
71. Consider the following statements: 1. Tropical cyclones have circular isobars. 2. Tropical cyclones originate· entirely within tropical air mass. 3. The intensity and magnitude of hurricanes generally exceed those of typhoons. 4. Tropical cyclones are more destructive than the western disturbances. Select the correct answer by using the following codes: [CDS 2001]
Correct : A. 1, 2 and 4
72. Consider the following statements regarding the atmosphere of the earth: 1. It is enveloping the earth because of gravity. 2. Its density decreases with increasing height from the surface of the earth. 3. Its characteristic composition is same throughout its height. 4. Amount of pressure it exerts on earth's surface at sea level is called one atm sphere. Which of these statements are correct? [CDS 2001]
Correct : D. 1, 2 and 4
73. The most important factor in thunderstorms development is: [IAS 2003]
Correct : B. atmospheric instability
74. Which of the following statements is not true? [UP PCS 2002]
Correct : B. The zone of maximum temperature is located along the equator.
75. Which are of the following is wrongly characterised?
Correct : D. Mistral - Rhone Valley - summer – cold
76. Which of the following is wrongly matched?
Correct : B. Rain caused by vertical circulation of air currents - orographic rainfall
77. Some large lakes in temperate latitudes have a moderating influence upon the climate
of adjacent land surfaces. Such an influence may develop when :
Correct : C. prevailing out-blowing winds cross the lake in winter
78. The absence of which among the following causes the temperature of the atmosphere
to decrease with ascent along with decreasing density of air? 1. Vegetation 2. Water 3. Carbon dioxide 4. Oxygen 5. Nitrogen
Correct : C. II and III
79. High mean temperature, high relative humidity and heavy rainfall (well distributed all over the year) are the characteristic features of the: [NDA 1990]
Correct : C. equatorial region
80. Mild and rainy winters, warm and dry summers are the characteristic features of: [IES
1994]
Correct : B. Mediterranean Region
81. Which of the following types of rainfall occurs at places having continental type of
climate?
Correct : B. Cyclonic
82. The polar regions of the earth cannot support forest growth because:
Correct : D. all the above factors
83. Snow line is :
Correct : C. the altitude above which snow never melts
84. Loess is _____ soil.
Correct : A. wind-deposited
85. The 'Climate' is the average atmospheric conditions of an area over a considerable period of time. For proper conclusions, observations are needed for a minimum period of:
Correct : C. 31 years
86. Perspiration is maximum when temperature is :
Correct : D. high and air is humid
87. Consider the following statements associated with Mediterranean climate: 1. It is so named because it occurs extensively in the periphery of Mediterranean sea. 2. These lands are exposed to hot, dry, land winds during the summer months. 3. The seasonal range of temperatures is considerable less than that in other areas of corresponding latitudes. Which of these statements are correct? [COS 1999)
Correct : A. 1, 2 and 3
88. Nights are cooler in the deserts than in the plains because: [CDS 2002]
Correct : A. sand radiates heat more quickly than the earth
89. Which one of the following pairs is correctly matched? [CDS 2001]
Correct : C. Pampas Region: Prairies
90. A large number of species are found within a small unit of area of: [CDS 1999]
Correct : D. wet evergreen equatorial forests
91. Summers in Western Europe are warmer than those in Eastern Europe because of: [CDS 2002]
Correct : A. the influence of the warm ocean current
92. Consider the following statements: 1. In equatorial regions, the year is divided into four main seasons. 2. In Mediterranean region, summer receives more rain. 3. In China type climate, rainfall occurs throughout the year. 4. Tropical highlands exhibit vertical zonation of different climates. Which of these statements are correct? [IAS 2003]
Correct : D. 3 and 4
93. Consider the following ecosystems: 1. Taiga 2. Tropical evergreen 3. Tropical deciduous 4. Tundra The correct sequence in decreasing order of the albedo values of these ecosystem is: [IAS 2002]
Correct : C. 4, 1, 3, 2
94. Consider the following statements: 1. The movement of the isotherms is greater over the land than it is over the oceans. 2. Coastal regions have a smaller range of temperature than do continental interiors. Which of these statements is/are correct ? [IES 2003]
Correct : C. Both 1 and 2
95. The mediterranean region specialises in fruit culture because: [IAS 2003]
Correct : C. the long dry summer favour drying and packing of fruits for export.
96. Which one of the following regions of the world is called “the bread basket of the world”? [IAS 2003]
Correct : A. Temperate grassland
97. The thermal equator is found:
Correct : C. north of geographical equator
98. Seasonal contrast in temperature are minimum in the equatorial region because:
Correct : B. sun is almost vertically overhead throughout the year
99. Grasses are almost absent in :
Correct : D. tropical wet-evergreen forest
100. The role of spines in the desert plants is :
Correct : C. to save the moisture from evaporation.