Challenge Prelims V1.0 – Day 16 – GS Paper (Geography)

1. Consider the following statements regarding extra-tropical cyclones:

1. Extratropical cyclones can originate on both land and sea.
2. Extratropical cyclones usually move in the east to west direction.
3. Pattern of wind direction in extratropical cyclones is anti-clockwise in the northern hemisphere.

How many of the statements given above is/are correct?

2. Consider the following statements with reference to Jet Streams:

1. Jet streams blow in a direction parallel to the pressure gradient force.
2. They help in the maintenance of latitudinal heat balance.

Which of the statements given above is/are correct?

3. Consider the following statements regarding Madden Julian Oscillation (MJO):

1. It moves westward from the Pacific Ocean to the Indian Ocean.
2. It is an equatorial traveling pattern of anomalous rainfall.
3. In its active phase, MJO brings frequent cyclonic activity and can initiate the onset of the monsoon in the tropics.

How many of the statements given above is/are correct?

4. With reference to El Nino, which of the following statements are correct?

1. It leads to an increase in the temperature of the water on the Peruvian coast.
2. It results in an increase in the number of plankton in the Eastern Pacific Ocean.
3. It can delay the onset of southwest monsoons in India.

Select the correct answer using the code given below.

5. Which of the following best explains the general absence of lightning during the active phase of the monsoon season?

6. Consider the following statements regarding the extratropical cyclones and tropical cyclones:

1. Extratropical cyclones can originate over the sea but not on land.
2. The wind velocity of a tropical cyclone is much higher and more destructive than an extratropical cyclone.
3. The extra tropical cyclones move from west to east but tropical cyclones, move from east to west.

How many of the statements given above is/are not correct?

7. Consider the following statements regarding Southern Oscillation in El Nino and Southern Oscillation (ENSO):

1. Its strength is measured in the Southern Oscillation Index (SOI) which is computed from the fluctuations in airpressure differences between Tahiti and Darwin.
2. El Niño episodes are associated with negative values of the SOI, meaning that the pressure at Tahiti is relatively low compared to Darwin.
3. When the Walker circulation enters its El Niño phase, the SOI is strongly negative.

How many statements given above are correct?

8. Consider the following statements:

1. The onset of an easterly jet stream over peninsular India.
2. Development of high pressure in the region lying to the north of the Himalayas.

Which of the above weather phenomenon are observed during the winter season in India?

9. With reference to the Easterly Jet Streams, consider the following statements:

1. The easterly jet stream shifts southward during the southwest monsoon period.
2. The easterly jet stream is responsible for bringing the tropical depressions into India.

Which of the statements given above is/are not correct?

10. Which of the following is/are correct about El-Nino?

1. It is merely an extension of the warm equatorial current which gets replaced temporarily by cold Peruvian current.
2. El-Nino event has led to delay in the onset of southwest monsoon over the Indian-subcontinent.

Select the correct answer using the code given below.

11. This is a vertical cloud with a rounded top and horizontal base, typical of humid tropical regions, associated with up-rising convectional currents. Its great white globular masses may look grey against the sun but it is a fair-weather cloud. Which of the following types of clouds is described in the above passage?

12. Which of the following statements is/are correct with reference to the anti-cyclones?

1. They are characterized by clear skies and calm air.
2. Winds in anti-cyclones blow anticlockwise in the northern hemisphere and clockwise in the southern hemisphere.

Select the correct answer using the code given below.

13. With reference to jetstreams, consider the following statements:

1. Somali jet is a low-level cross-equatorial flow of air that attains jet speed along the east coast of Africa.
2. Strengthening of the Somali is associated with a strong monsoon over peninsular India.
3. The Tropical Easterly jet runs from the east coast of Vietnam to the west coast of Africa.
4. During Break monsoon conditions, the Tropical Easterly jet completely dissipates from the Indian Subcontinent.

How many of the statements given above is/are not correct?

14. In the context of disaster management, the Dvorak technique recently seen in the news is used to

15. Which of the following statements is not correct regarding the sub-tropical high-pressure belts?