UPSC GS Daily MCQs: 04.05.18

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Questions: Geography #UPSC

1)The Nilgiris along the west coast are relatively tectonically stable as compared to the Himalayas; but, still, debris avalanches and landslides occur though not as frequently as in the Himalayas, in these hills. Why?

  1. Many slopes are steeper with almost vertical cliffs and escarpments in the Western Ghats and Nilgiris.
  1. Mechanical weathering due to temperature changes and ranges is pronounced in this region.
  1. They are mostly made up of sedimentary rocks and unconsolidated and semi-consolidated deposits.
  1. They receive heavy amounts of rainfall over short periods.

Codes:

(a) 1, 2 and 3

(b) 2, 3 and 4

(c) 1, 2 and 4

(d) 1 and 4

Ans.  (c)

Exp: The debris avalanches and landslides occur very frequently in the Himalayas because the Himalayas are tectonically active. They are mostly made up of sedimentary rocks and unconsolidated and semi-consolidated deposits. The slopes are very steep. Compared to the Himalayas, the Nilgiris bordering Tamil Nadu, Karnataka, Kerala and the Western Ghats along the west coast are relatively tectonically stable and are mostly made up of very hard rocks; but, still, debris avalanches and landslides occur though not as frequently as in the Himalayas, in these hills. Why? Many slopes are steeper with almost vertical cliffs and escarpments in the Western Ghats and Nilgiris. Mechanical weathering due to temperature changes and ranges is pronounced. They receive heavy amount of rainfalls over short period.

 

2)Which of the following statements correctly depicts the impact of El-Nino on the Peruvian coast?

  1. Reduction in the amount of planktons.
  2. Occurrence of drought.
  3. The location of tropical storms shifts

westward from coast.

Codes:

(a) Only 1 (b) 1 and 2

(c) 1 and 3 (d) All

Ans.  (a)

Exp: The location of tropical storms shifts eastward in pacific ocean during an El Niño because atmospheric moisture is fuel for thunderstorms, and the greatest amount of evaporation takes place above the ocean’s warmest water. Flooding occurs in Peruvian coast.

3)Which of the following is true regarding global isotherms?

  1. Isotherms of southern hemisphere are more regular and straight as compared to that of northern hemisphere.
  1. In January the isotherms deviate to the north over the ocean and to the south over the continent in the Northern Hemisphere.

Codes:

(a) Only 1

(b) Only 2

(c) Both

(d) None

Ans.  (c)

Exp: The Isotherms are lines joining places having equal temperature. Isotherms of southern hemisphere are more regular and straight as compared to that of northern hemisphere because southern hemisphere has very low land by ocean proportion. In January the isotherms bend towards pole in northern hemisphere because in northern winters, temperature greatly reduces from equator to polar regions