Which of the following statements about tropical cyclone are correct? 1. It originates and develops over warm oceanic surface. 2. Presence of Coriolis force is necessary for it. 3. It occurs in middle latitudinal region. 4. It develops 'eye' with calm and descending air condition. Select the correct answer using the code given below.
- A.1 and 2 only
- B.1, 2 and 4
- C.3 and 4 only
- D.2, 3 and 4
Correct answer
Explanation
The correct answer is B, 1, 2 and 4. Statements 1, 2 and 4 are correct; tropical cyclones form in tropical, not middle, latitudes.
Tropical cyclones form over warm seas with surface temperatures above about 27°C, which supply heat and moisture through evaporation and condensation. They need the Coriolis force to set up a rotating circulation, which is why they do not form within about 5 degrees of the Equator. A mature cyclone has a central eye, a calm area of light winds, clear sky and descending air, surrounded by the eye wall, where winds and rain are strongest.
A is wrong: it leaves out statement 4, the calm eye.
C is wrong: it includes statement 3 and leaves out statements 1 and 2.
D is wrong: statement 3 is false; mid-latitude storms are temperate, or extra-tropical, cyclones.
Exam tip: a tropical cyclone needs a warm sea above 27°C and the Coriolis force (none at the Equator); its eye is calm.
Practice Questions
View allConsider the following statements: 1. River Kaveri has well developed valley 2. Valley of River Alakananda is still growing 3. River Krishna is largest east flowing peninsular river Which of the statements given above is/are correct?
- A.1 only
- B.1 and 2
- C.2 and 3
- D.2 only
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The Kaveri is an old peninsular river with a mature valley, and the Alaknanda is a young Himalayan river still cutting its valley, but the largest east-flowing peninsular river is the Godavari, not the Krishna.
Read the full explanation →Which one of the following statements is NOT correct?
- A.Mahogany is a timber species of Tropical Rainforest
- B.Chaparral vegetation is found in Taiga climate
- C.Lichens are predominantly found in Tundra region
- D.Sal is a representative species of Moist Deciduous Forest
Show answer
Chaparral is the shrub vegetation of the Mediterranean climate in California, not of the cold Taiga, so this statement is incorrect.
Read the full explanation →The heaviest rocks, which are rolled along the river bed in river transport, come under which type of load?
- A.Solution load
- B.Suspension load
- C.Saltation load
- D.Traction load
Show answer
Boulders and large pebbles are too heavy to be lifted by the water, so the river rolls, slides and drags them along its bed; this is traction.
Read the full explanation →In India, Cardamom Hills are regarded as a continuation of the
- A.Eastern Ghats
- B.Mizo Hills
- C.Naga Hills
- D.Western Ghats
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The Cardamom Hills form the southernmost part of the Western Ghats, lying south of the Palghat Gap along the Kerala–Tamil Nadu border.
Read the full explanation →The speakers of major Indian languages belong to how many language families ?
- A.Two
- B.Three
- C.Four
- D.Six
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The major languages of India belong to four language families: Indo-European (Indo-Aryan), Dravidian, Austric (Austro-Asiatic) and Sino-Tibetan. The Indo-Aryan branch of the Indo-European family is the largest, spoken by about three-quarters of Indians and including Hindi, Bengali, Marathi, Gujarati, Punjabi and Odia.
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