Tropical SystemsAviation Meteorology — DGCA CPL practice questions

Question 1 of 37

Wind speed in a tropical severe cyclone is

A.27–33 kt

B.48–63 kt

C.17–27 kt

All 37 questions — Tropical Systems

Aviation Meteorology · DGCA CPL. The correct option is marked on each.

Q1. Wind speed in a tropical severe cyclone is
- A.27–33 kt
- B.48–63 kt✓
- C.17–27 kt
Why: Severe cyclonic storm intensity is 48–63 kt.
Q2. In a mature tropical cyclone, the eye area is characterised by
- A.Moderate weather
- B.Stormy weather
- C.Calm wind, little clouding and practically no rainfall✓
Why: The eye is calm with little cloud and no rain.
Q3. Cyclonic storm cross Tamil Nadu coast during
- A.Oct–Nov✓
- B.Jul–Aug
- C.Feb–May
Why: NE-monsoon cyclones cross the Tamil Nadu coast in Oct–Nov.
Q4. Cyclonic storms form over Indian seas during
- A.SW monsoon
- B.Winter Season
- C.Pre-Monsoon & Post Monsoon✓
Why: Peak cyclone seasons are pre-monsoon and post-monsoon.
Q5. TRS occurs over Indian seas in
- A.Equatorial Region
- B.5–15° N✓
- C.0–5° N
Why: Tropical revolving storms form in the 5–15° latitude belt where Coriolis is adequate.
Q6. During the months of July, August, Monsoon Depression form over
- A.Over Head Bay✓
- B.Central Bay
- C.South Bay
Why: July–August monsoon depressions form over the head Bay of Bengal.
Q7. In a monsoon depression maximum weather occurs in
- A.SE sector
- B.NW sector
- C.SW sector✓
Why: Maximum rain/weather is in the SW sector of a monsoon depression.
Q8. During re-curvature maximum weather in a monsoon depression occurs in
- A.SE sector
- B.NW sector
- C.SW sector
- D.NE sector✓
Why: On re-curvature the maximum weather shifts to the NE sector.
Q9. On whatever compass course the cyclone is approached, strong winds from the port indicate that the centre lies somewhere
- A.Ahead✓
- B.Behind
- C.Port
- D.Starboard
Why: Winds from the port side place the storm centre ahead.
Q10. In a mature tropical cyclone, they eye area is characterised by:
- A.moderate winds and heavy rains
- B.hurricane force winds and squalls
- C.calm wind, little clouding and practically no rainfall✓
Why: The eye is calm with little cloud and no rain.
Q11. cyclonic storm cross tamil Nadu coast in :
- A.Oct - Nov✓
- B.Jul Aug
- C.Feb May
Why: NE-monsoon cyclones cross the Tamil Nadu coast in Oct–Nov.
Q12. Cyclonic storms forms over Indian seas during
- A.SW monsoon
- B.NE monsoon
- C.Pre - Monsoon & Post Monsoon✓
Why: Peak cyclone seasons are pre-monsoon and post-monsoon.
Q13. In the Bay of Bengal during the months of Jul, august, Monsoon Depression form
- A.Over Head bay✓
- B.Central Bay
- C.South Bay
Why: July–August monsoon depressions form over the head Bay of Bengal.
Q14. The well developed extra tropical cyclonic storm is composed of two main frontal systems and an occluded front, which varies in extent:
- A.A stationary Front followed by a warm front
- B.A low with a warm front radiating out Southwards followed by a cold front .✓
- C.A warm front and an occluded front
- D.None of the above
Why: A mature extratropical low has a leading warm front and a trailing cold front.
Q15. cyclonic storms are confined almost entirely to the
- A.Latitudes near Equator
- B.Tropic latitudes✓
- C.Polar lat.
- D.Mid lat.
Why: Tropical cyclones are confined to tropical latitudes.
Q16. The weather expected in a well developed cyclonic storm is :
- A.Moderate Weather
- B.Stormy weather✓
- C.Clear skies
- D.No wind or temperature change
Why: A well developed cyclonic storm brings stormy weather.
Q17. Average Life of a tropical cyclone in India is
- A.10 Days
- B.68 Days
- C.3 - 4 Days✓
Why: Indian tropical cyclones last about 3–4 days on average.
Q18. Eye of a CS is surrounded by
- A.Shelf Clouds
- B.Wall Clouds✓
- C.Rotor Clouds
- D.Roll clouds
Why: The eye is surrounded by the wall cloud.
Q19. CS in India region are less intense because
- A.They have a very short travel over the sea✓
- B.Sea surface temp, are not high
- C.India is close to Equator
Why: Short sea track limits intensification of Indian cyclonic storms.
Q20. Surge is sudden strengthening of wind in the …….. air mass
- A.Same✓
- B.Different
- C.Both
Why: A surge is a strengthening of wind within the same air mass.
Q21. Surge and Shear Line are Features of ……… monsoon
- A.Vigorous✓
- B.Weak
- C.Moderate
Why: Surge and shear line are features of a vigorous monsoon.
Q22. Peninsular discontinuity occurs along
- A.West Coast
- B.East Coast
- C.Central peninsula✓
Why: The peninsular discontinuity lies along the central peninsula.
Q23. Peninsular discontinuity occurs during
- A.Monsoon
- B.NE Monsoon
- C.Pre Monsoon✓
Why: It occurs during the pre-monsoon season.
Q24. Surge is also
- A.Velocity Divergence
- B.Velocity Convergence✓
- C.Like ITCZ
Why: A surge represents velocity convergence.
Q25. In a depression the wind speed is
- A.< 17 kt
- B.34 47 kt
- C.17 - 27 kt✓
- D.48 63 kt
Why: A depression has winds of 17–27 kt.
Q26. In a CS the wind speed is
- A.< 17 kt
- B.34 - 47 kt✓
- C.17 27 kt
- D.28 33 kt
Why: A cyclonic storm has winds of 34–47 kt.
Q27. A monsoon depression Slopes ……. with height
- A.SE
- B.NW
- C.SW✓
- D.NE
Why: A monsoon depression slopes SW with height toward colder air.
Q28. Average life of a monsoon depression is
- A.2 3 days
- B.8 9 days
- C.3 - 5 days✓
- D.10 12 days
Why: Monsoon depressions last about 3–5 days.
Q29. Monsoon Depression moves faster over
- A.Sea
- B.Plains✓
- C.Hills
- D.Rivers
Why: Monsoon depressions travel faster over the plains than over hills.
Q30. For formation of a CS sea surface temperature should be
- A.26 ⁰ - 27 ⁰ C✓
- B.23 ⁰ 24 ⁰ C
- C.24 ⁰ 25 ⁰ C
- D.30 ⁰ C
Why: Sea-surface temperature must be at least 26–27°C.
Q31. In extra tropical cyclone family there are 3 4 CS or Depressions, one to the ……… of the other
- A.SE
- B.NW
- C.SW✓
- D.NE
Why: Successive family members lie to the SW of the preceding one.
Q32. In TRS the central pressure is about
- A.1002 1010 hpa
- B.1000 - 900 hpa✓
- C.1010 1020 hpa
Why: Central pressure in a TRS falls to about 1000–900 hPa.
Q33. TRS develop over …….. deg Lat
- A.0 5
- B.5 - 15✓
- C.25 30
- D.30 40
Why: TRS develop over the 5–15° latitude belt.
Q34. Extra Tropical Storms originate in
- A.Equatorial Front
- B.Tropical Front
- C.Polar Front✓
Why: Extratropical storms form along the polar front.
Q35. Extra tropical storms generally moves in the direction
- A.S to E
- B.W to E✓
- C.S to W
- D.E to W
Why: Extratropical storms move west to east with the westerlies.
Q36. A tropical Cyclone moves …….. in a day
- A.300 - 500 km✓
- B.500 700 km
- C.700 900 km
Why: A tropical cyclone advances about 300–500 km per day.
Q37. A Tropical CS has outer storm area of about
- A.> 400 Km✓
- B.> 700 Km
- C.> 900 Km
Why: The outer storm area extends to a radius greater than 400 km.