NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Studies
NDA 2025 · General Ability · General Studies
Consider the following conditions favourable for the formation and...
Consider the following conditions favourable for the formation and intensification of Tropical Storms:
1. Presence of the Coriolis force
2. Upper divergence above the sea level system
3. High variations in the vertical wind speed
Which of the conditions given above is/are correct?
1. Presence of the Coriolis force
2. Upper divergence above the sea level system
3. High variations in the vertical wind speed
Which of the conditions given above is/are correct?
Options
- A1 only
- B2 only
- C1 and 2
- D2 and 3
Correct answer
C. 1 and 2
Step-by-step solution
Tropical cyclones require specific conditions for their formation and intensification.
The presence of the Coriolis force is essential to create the cyclonic vortex, as it deflects the wind and causes rotation. Thus, condition 1 is correct.
Upper divergence above the sea level system is necessary to remove the rising air, which helps maintain the low pressure at the surface. Thus, condition 2 is correct.
Small variations in the vertical wind speed (low vertical wind shear) are favourable. High vertical wind shear disrupts the storm structure by blowing away the heat and moisture concentrated near the center. Thus, condition 3 is incorrect.
Therefore, only conditions 1 and 2 are correct.
Answer: 1 and 2
The presence of the Coriolis force is essential to create the cyclonic vortex, as it deflects the wind and causes rotation. Thus, condition 1 is correct.
Upper divergence above the sea level system is necessary to remove the rising air, which helps maintain the low pressure at the surface. Thus, condition 2 is correct.
Small variations in the vertical wind speed (low vertical wind shear) are favourable. High vertical wind shear disrupts the storm structure by blowing away the heat and moisture concentrated near the center. Thus, condition 3 is incorrect.
Therefore, only conditions 1 and 2 are correct.
Answer: 1 and 2