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Atmospheric Circulation and Weather Systems

Atmospheric Circulation, Atmospheric Circulation and Weather Systems, XI, Geography

20 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is found along 30 degrees north and 30 degrees south?

  1. High pressure areas known as polar highs
  2. High pressure areas known as equatorial highs
  3. High pressure areas known as sub-tropical highs
  4. Low pressure areas known as sub-polar lows
  5. Low pressure areas known as sub-tropical lows
Question 2 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

a. The vertical pressure gradient force is much larger than that of the horizontal pressure gradient.
b. The vertical pressure gradient force is balanced by a nearly equal, but opposite gravitational force.
c. The air at the surface is denser and hence, has higher pressure due to gravity.

  1. a only
  2. b only
  3. c only
  4. a and b
  5. a, b and c
Question 3 Multiple Choice (Single Answer)

Which of the following statements is/are incorrect?

a. Horizontal distribution of pressure is studied by drawing isobars at constant levels.
b. Sea level pressure belts are considered constant and are used for measuring horizontal distribution of pressure.
c. The horizontal distribution of pressure oscillates with the apparent movement of the Sun.

  1. a and b
  2. a and c
  3. only c
  4. Only b
  5. a, b and c
Question 4 Multiple Choice (Single Answer)

Which of the following is/are correct?

a. Coirolis force causes tropical cyclones near the equator.
b. The Coriolis force acts perpendicular to the pressure gradient force.
c. Coriolis force deflects the wind to the right direction in the northern hemisphere and to the left in the southern hemisphere.

  1. a and b
  2. b and c
  3. a and c
  4. a, b and c
  5. a only
Question 5 Multiple Choice (Single Answer)

Which of the following is the correct reason for the absence of strong upward winds on the Earth's surface?

  1. Because the vertical pressure gradient force is much larger than that of the horizontal pressure gradient
  2. Because the vertical pressure gradient force is similar to that of the horizontal pressure gradient
  3. Because the vertical pressure gradient force is balanced by a nearly equal but opposite gravitational force
  4. Because the vertical gradient force is lesser than that of the horizontal pressure gradient
  5. Because there is no vertical gradient force in the lower atmosphere and the air remains heavy and follows the horizontal pressure gradient
Question 6 Multiple Choice (Single Answer)

Frictional force affects the

a. speed of wind
b. direction of wind
c. pressure belts

  1. a only
  2. b only
  3. c only
  4. a and b
  5. b and c
Question 7 Multiple Choice (Single Answer)

When two different air masses meet, the boundary zone between them is called

  1. local wind
  2. Inter Tropical Convergence Zone (ITCZ)
  3. front
  4. tropical cyclone
  5. thunderstorm
Question 8 Multiple Choice (Single Answer)

What is the affect of a high pressure gradient force?

  1. There are low velocity winds.
  2. There are higher velocity winds.
  3. Tropical cyclones are formed.
  4. Low pressure areas are formed.
  5. There is absence of deflection in the direction of wind.
Question 9 Multiple Choice (Single Answer)

Match the following:

 
a. The wind that blows parallel to a straight isobar 1. Cyclonic circulation
b. The wind that circulates around a low 2. Anti cyclonic circulation
c. The wind that circulates around a high 3. Geostropic wind
  1. a - 1, b - 2, c - 3
  2. a - 2, b - 3, c - 1
  3. a - 3, b - 1, c - 2
  4. a - 3, b - 2, c - 1
  5. a - 1, b - 3, c - 2
Question 10 Multiple Choice (Single Answer)

The pattern of the movement of the planetary winds is called the general circulation of the atmosphere. Which of the following statements is correct about the cells that make this circulation possible?

a. The largest cells extend from the equator to between 30o North and South, and are named Hadley cells.
b. The easterlies blow from subtropical high and are named Ferrel cells.
c. The westerlies blows towards middle latitudes and are called polar cells.

  1. a only
  2. b only
  3. c only
  4. b and c
  5. a, b and c
Question 11 Multiple Choice (Single Answer)

Which of the following is/are correct about extra tropical cyclones?

a. The extra tropical cyclones have a clear frontal system.
b. They cover a large area and can originate over the land and sea.
c. The extra tropical cyclones move from east to west.

  1. a only
  2. b only
  3. c only
  4. a and b
  5. b and c
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

a. The pressure gradient is weak where the isobars are close to each other and is strong where the isobars are apart.
b. The rate of change of pressure with respect to distance is the pressure gradient.
c. The differences in atmospheric pressure affect the speed of wind.

  1. a only
  2. b only
  3. c only
  4. a and c
  5. a, b and c
Question 13 Multiple Choice (Single Answer)

What is southern oscillation?

  1. The warming and cooling of oceans
  2. The appearance of warm water off the coast of Peru
  3. The change in pressure condition over Pacific ocean
  4. The pattern of wind circulation in the southern hemisphere
  5. The winds from the tropics converging at low pressure zone
Question 14 Multiple Choice (Single Answer)

Which of the following is not a type of front?

  1. Cold
  2. Warm
  3. Stationary
  4. Cyclonic
  5. Occluded
Question 15 Multiple Choice (Single Answer)

Which of the following is not a type of air mass?

  1. Maritime tropical
  2. Continental tropical
  3. Maritime polar
  4. Maritime arctic
  5. Continental polar
Question 16 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

a. Thunderstorms are of short duration, occur over a small area but are violent.
b. A thunderstorm is a well-grown cumulonimbus cloud producing thunder and lightening.
c. A thunderstorm can generate dust storms.

  1. a and b
  2. b and c
  3. a and c
  4. a, b and c
  5. b only
Question 17 Multiple Choice (Single Answer)

Which of the following is/are correct statements?

a. Fronts occur in middle latitudes and are characterised by steep gradient in temperature and pressure.
b. Fronts cause abrupt changes in temperature and cause the air to rise to form clouds and cause precipitation.
c. Homogenous surfaces, over which front forms, are called the source regions.

  1. only a
  2. only b
  3. a and b
  4. b and c
  5. a, b and c
Question 18 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

a. The cool air of the high plateaus and ice fields draining into the valley is called valley breeze.
b. The warm wind on the leeward side of the mountains that carry moisture that condenses and precipitates are called katabatic winds.
c. In mountainous regions, the slopes get cooled during the night and the dense air descends into the valley as the mountain wind.

  1. a only
  2. b only
  3. c only
  4. a and b
  5. b and c
Question 19 Multiple Choice (Single Answer)

Coriolis force is

  1. minimum at the poles and is maximum at the equator
  2. always equal to the pressure gradient force
  3. dependent on the speed of the wind
  4. equal over the surface of the earth
  5. maximum at the poles and is absent at the equator
Question 20 Multiple Choice (Single Answer)

Which of the following conditions is not favourable for the formation and intensification of tropical storms?

  1. Large sea surface with temperature higher than 27oC
  2. Absence of the Coriolis force
  3. Small variations in the vertical wind speed
  4. A pre-existing weak low-pressure area or low-level-cyclonic circulation
  5. Upper divergence above the sea level system
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