Climatology of IndiaAviation Meteorology — DGCA CPL practice questions
Question 1 of 24
During winters the activity of radiation fog increases after the passage of a WD over N India. Which of the following is correct?
All 24 questions — Climatology of India
Aviation Meteorology · DGCA CPL. The correct option is marked on each.
Q1. During winters the activity of radiation fog increases after the passage of a WD over N India. Which of the following is correct?
- A.Advection fog occurs over northern & central parts of India
- B.Radiation fog occurs over southern parts of India
- C.Activity of Radiation fog increases after the passage of a WD over N India✓
Why: Clearing skies and calm after a WD favour nocturnal radiation fog over N India.
Q2. Low Temperatures and low humidity is the characteristic of
- A.Pre Monsoon
- B.Summer
- C.Monsoon
- D.Winter✓
Why: Winter over N India brings cold, dry continental conditions.
Q3. The Summer Season period is
- A.Jan–Feb
- B.Mar–May✓
- C.Jul–Sept
- D.Oct–Dec
Why: Indian hot-weather/summer season runs March to May.
Q4. During the summer season:
- A.WDs cause TS/DS over Punjab & Rajasthan✓
- B.No WD affects the northern parts of the country
- C.The track of WD is southern most
Why: In summer the Western Disturbances are fewer and track further north, but they can still cause thunderstorms and dust storms over Punjab and Rajasthan.
Q5. The monsoon current over the West Coast of India is
- A.SWly✓
- B.SEly
- C.NEly
- D.NWly
Why: SW monsoon flow off the Arabian Sea reaches the west coast from the SW.
Q6. Monsoon period is
- A.Jan to Feb
- B.March to May
- C.Jun to Sep✓
- D.Oct to Dec
Why: SW monsoon season is June to September.
Q7. The rainfall over India during monsoon depends on
- A.Low over Pakistan
- B.Depression over Bay of Bengal
- C.The position of the axis of Monsoon Trough✓
Why: Distribution of monsoon rain is governed by the position of the monsoon trough axis.
Q8. Rainfall occurs all over the country during monsoon when the axis of MT is along the
- A.Axis of MT is in its normal position along Gangetic plains✓
- B.Foot hills of Himalayas
- C.Depression formed over Bay of Bengal
Why: Widespread rain when the trough lies in its normal Gangetic-plains position.
Q9. Break in monsoon occurs when the axis of the monsoon trough is along the
- A.Gangetic plains
- B.Foot hills of Himalayas✓
- C.Bay of Bengal
Why: Break in monsoon when trough shifts north to the Himalayan foothills.
Q10. During winters
- A.Advection fog occurs over northern & central part of India
- B.Radiation fog occurs in southern part of country
- C.Activity of Radiation fog increases after the passage of a WD over N India✓
Why: Post-WD clear calm nights enhance radiation fog over N India.
Q11. Hot weather period is
- A.Jan Feb
- B.Mar - May✓
- C.Jun Sept
- D.Oct Dec
Why: Hot-weather season is March to May.
Q12. During hot weather
- A.WDs cause TS / DS over Punjab & Rajasthan✓
- B.No WD affect Nparts of country
- C.Track of WD is southern most
Why: Summer WDs trigger thunderstorms/duststorms over Punjab and Rajasthan.
Q13. The monsoon advances with
- A.Bay of Bengal current only
- B.Arabian Sea current only
- C.Bay of Bengal and Arabian sea currents✓
Why: SW monsoon advances through both the Arabian Sea and Bay of Bengal branches.
Q14. Rainfall occurs all over the country during monsoon when
- A.Axis of MT is in its normal position along Gangetic plains✓
- B.Axis of MT is along Himalayas
- C.Depression has formed oer Bay of Bengal
Why: Good country-wide rain when trough is in its normal Gangetic-plains position.
Q15. Break in monsoon occurs when the axis of monsoon trough is along the
- A.Gangetic plains
- B.foot hills of Himalayas✓
- C.Bay of Bengal
Why: Break condition when trough moves to the Himalayan foothills.
Q16. Monsoon is also called
- A.NE monsoon
- B.SW monsoon✓
- C.SE monsoon
Why: The Jun–Sep summer monsoon is the SW monsoon.
Q17. Post monsoon weather period is
- A.Mar to May
- B.Jun to Sept
- C.Oct to Nov✓
- D.Jan to Feb
Why: Post-monsoon season follows the SW monsoon in Oct–Nov.
Q18. During monsoon period, low pressure lies over
- A.Bay of Bengal
- B.NE India
- C.Central India
- D.Pakistan✓
Why: The seasonal monsoon heat low sits over NW India/Pakistan.
Q19. During vigorous monsoon period the pressure gradient over west coast is
- A.Weak
- B.Steep✓
- C.Normal
Why: Vigorous monsoon means a strong offshore pressure gradient and strong west-coast winds.
Q20. An aircraft flying in Pre monsoon season from Delhi to Kolkata at 10 km will experience winds
- A.Easterly
- B.Westerly✓
- C.Northerly
- D.Southerly
Why: At 10 km pre-monsoon the subtropical westerly jet gives westerly winds over N India.
Q21. During break monsoon sometimes the surface winds over East UP and Bihar are
- A.very strong✓
- B.weak
- C.normal
Why: Break-monsoon easterly surges can make surface winds over E UP and Bihar very strong.
Q22. Mid tropospheric cyclone during monsoon form over
- A.Orissa
- B.Punjab
- C.Gujarat✓
- D.Chennai
Why: Mid-tropospheric cyclones form off the Gujarat/Saurashtra coast in the monsoon.
Q23. El Nino episode is applied by fishermen (of Ecuador and N peru) to a period of reduced fish catch due to suppression of upwelling
- A.warm surface coastal current✓
- B.Wly surface coastal current
- C.Cold surface coastal current
Why: El Nino is a warm coastal current suppressing nutrient upwelling off Peru/Ecuador.
Q24. During break in monsoon rain occurs
- A.along foot hills✓
- B.NW India
- C.S India
Why: In a break, rain concentrates along the Himalayan foothills as the trough shifts north.