NTA UGC NET/JRF Exam, June, 2020 Geography

Total Questions: 100

91. Please read the following passage and answer the questions

Tropical cyclones are closed low - pressure system, generally about 650 km in diameter, which bring violent winds, torrential rainfall and thunderstorms. Generally, they contain a central region, the eye, with a diameter of about ten kilometres with light winds and more or less lightly clouded sky.
In order for cyclones to develop various conditions need to be fulfilled. There must be a plentiful supply of moisture, and for this reason distribution of cyclones is closely related to those regions where the highest sea - surface temperatures are found i.e. the western portion of the tropical oceans in late summer with temperature of at least 27°C. This moisture provides the necessary latent heat to drive the storm and to provide the rainfall.
Tropical cyclones tend to occur mainly in between the Tropic of Capricorn and Tropic of cancer except the equatorial region i.e. 5° on both sides of the equator because closer than that to the Equator the Coriolis parameter approaches Zero. The main cyclone activity in the Northern Hemisphere is in late summer and autumn during the time of the equatorial trough's northern displacement.
Which one of the following elements is not associated with tropical cyclones?

Correct Answer: (d) Dense fog
Solution:Dense fog is absent in tropical cyclones because it generated due to convergence of two different air masses like as in Temperate cyclones which is absent in tropical cyclone.

92. Which of the following is the regional name of tropical cyclone in West Indies?

Correct Answer: (b) Hurricane
Solution:

According to paragraph, Hurricane is the correct answer. According to para, Tropical cyclones tend to occur mainly in between the Tropic of Capricorn and Tropic of cancer except the equatorial region i.e 5° on both side of the equator because closer than that to the Equator the Coriolis parameter approaches Zero.

93. The cyclone activity in the Northern Hemisphere is associated with

Correct Answer: (d) Summer and Autumn
Solution:

The cyclone activity in the Northern Hemisphere is associated with Summer and Autumn. As para says the main cyclone activity in the Northern Hemisphere is in late summer and autumn during the time of the equatorial trough's northern displacement

94. Which of the following conditions is essential to develop a tropical cyclone

Correct Answer: (c) Plentiful supply of moisture
Solution:

Mixing of cold and warm ocean currents is essential to develop a tropical cyclone according to the paragraph. In order for tropical cyclones to develop various conditions need to be fulfilled. There must be a plentiful supply of moisture, and for this reason distribution of cyclones is closely related to those regions where the highest sea - surface temperatures are found i.e. the western portion of the tropical oceans in late summer with temperature of at least 27°C.
This moisture provides the necessary latent heat to drive the storm and to provide the rainfall. Tropical cyclones tend to occur mainly in between the Tropic of Capricorn and Tropic of cancer except the equatorial region i.e 5º on both side of the equator because closer than that to the Equator the Coriolis parameter approaches Zero.

95. Which one of the following sea-surface temperature is ideal for the formation of tropical cyclone?

Correct Answer: (a) 27°C
Solution:

27°C is ideal sea-surface temperature for the formation of tropical cyclone. As para says there must be a plentiful supply of moisture, and for this reason distribution of cyclones is closely related to those regions where the highest sea - surface temperatures are found i.e. the western portion of the tropical oceans in late summer with temperature of at least 27°С.
Comprehension: Passage
Directions: Consider the following data and answer questions:

96. Which one of the following is the cumulative frequency for the class limit 401 – 500 from the given data set.

Correct Answer: (d) 80
Solution:

According to the given data 80 is the correct answer. Cumulative frequency is the total of a frequency and all frequencies in a frequency distribution until a certain defined class interval. The running total of frequencies starting from the first frequency till the end frequency is the cumulative frequency. The total and the data are shown in the form of a table where the frequencies are divided according to class intervals.

97. Which one of the following is the cumulative frequency of the entire data set.

Correct Answer: (a) 125
Solution:

125 is the cumulative frequency of the entire data set.

98. Which one of the following is the relative frequency in percentage for class limit 301-400 from the given data set.

Correct Answer: (b) 19.2
Solution:

19.2 is the relative frequency in percentage for class limit 301-400 from the given data set. Relative frequency is simply the class frequency (f)
19.2 is the relative frequency in percentage for class limit 301-400 from the given data set.

99. Which one of the following is the mode value for the given data set

Correct Answer: (d) 441
Solution:

441 is the mode value for the given data set.

S. No.Class LimitClass BoundaryClass WidthFrequency
1101–200100.5–200.51004
2201–300200.5–300.510012
3301–400300.5–400.510024 (fp)
4401–500400.5–500.510040 (fm)
5501–600500.5–600.510016 (ff)
6601–700600.5–700.510012
7701–800700.5–800.510010
8801–900800.5–900.51005
9901–1000900.5–1000.51002

Mode = 400.5 + ((40 − 24) / ((40 − 24) + (40 − 16))) × 100
Mode = 441 persons/sq. km.

100. Which one of the following is the arithmetic mean value for the given data set

Correct Answer: (c) 483
Solution:

483 is the arithmetic mean value for the given data set.
Calculation:

S. No.Class LimitClass BoundaryClass Marks (xi)Frequency (fi)fi × xi
1101–200100.5–200.5150.54602
2201–300200.5–300.5250.5123006
3301–400300.5–400.5350.5248412
4401–500400.5–500.5450.54018020
5501–600500.5–600.5550.5168808
6601–700600.5–700.5650.5127806
7701–800700.5–800.5750.5107505
8801–900800.5–900.5850.554252.5
9901–1000900.5–1000.5950.521901