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GeographyMediumAsked in: SSC CHSL · 09 March, 2023, Shift 1

Which of the following statement is correct regarding air pressure?

  1. A.High pressure is associated with cloudy skies and wet weather.
  2. B.Low pressure is associated with clear and sunny skies.
  3. C.The air always moves from high pressure areas to low pressure areas.
  4. D.The air pressure is lowest at sea level and increases with height.

Correct answer

C. The air always moves from high pressure areas to low pressure areas.

Explanation

The correct answer is C, The air always moves from high pressure areas to low pressure areas. Air flows from where pressure is high to where it is low, and that moving air is what we call wind; the greater the difference in pressure, the stronger the wind. The Coriolis force then bends this flow, to the right in the Northern Hemisphere and to the left in the Southern. Option A is wrong because high pressure means sinking air, which brings clear skies and dry weather. Option B is wrong because low pressure means rising air that cools and condenses, so it brings clouds and rain. Option D is wrong because air pressure is highest at sea level, about 1,013 millibars, and falls as one goes up and the air thins. Pressure is measured with a barometer and shown on weather maps by isobars, the lines joining places of equal pressure. Exam tip: high pressure means sinking air and clear weather; low pressure means rising air, clouds and rain.

Practice Questions

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Q2.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements is/are correct? 1. Himalayan rivers have their origin in the snow-covered areas, hence are dry in winter season. 2. Rivers of the Peninsular Plateau have reached maturity. 3. Himalayan rivers depict all the three stages of normal cycle of erosion. Select the correct answer using the code given below.

  1. A.2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: C. 2 and 3 only

Himalayan rivers are perennial, so statement 1 is wrong, while statements 2 and 3 are correct. Himalayan rivers such as the Ganga, Indus and Brahmaputra rise from glaciers and snowfields and also get monsoon rain, so they flow all year round, including in winter.

Q3.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements related to latitude are true? 1. Rainfall, temperature and vegetation vary with latitude. 2. The difference between the longest day and the shortest day increases with latitude. 3. Indira Point is located approximately at 6°45' N latitude. Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

All three statements about latitude are true. Latitude decides how directly the Sun's rays strike a place, so temperature, rainfall and the type of vegetation change from the equator towards the poles, from hot, wet rainforests to cold tundra.

Q4.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following lakes is/are situated in Ladakh? 1. Tso Kar 2. Pangong Tso 3. Tsomgo 4. Tso Moriri Select the correct answer using the code given below.

  1. A.1 only
  2. B.2 and 3
  3. C.1, 2 and 4
  4. D.2 and 4 only
Show answer
Correct answer: C. 1, 2 and 4

Tso Kar, Pangong Tso and Tso Moriri are high-altitude lakes of Ladakh, while Tsomgo lies in Sikkim. Pangong Tso, at about 4,350 metres, is a long, narrow lake that stretches from Ladakh into Tibet, and most of its length lies on the Chinese side.