Questions from Crash Course
1. Choose the incorrect statement:
- Anabatic Winds – These Winds are upslope winds driven by warmer surface temperatures on a mountain slope than the surrounding air column.
- Katabatic Winds – Katabatic winds are downslope winds created when the mountain surface is colder than the surrounding air and creates a downslope wind.
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
2. Which of the following explains the role of airmasses in macro-climatic changes :
- The interaction of cold and warm air masses gives rise to extratropical cyclones and associated rainfalls.
- When air mass originates in the coastal areas, it contains more humid content which causes heavy precipitation.
- A hot dry airmass could give rise to devastating droughts as well as wildfires.
A. Only 1 and 2
B. Only 2 and 3
C. Only 1 and 3
D. 1, 2 and 3
3. Choose the correct statements :
- Meandering in Jetstreams depends on temperature contrast .
- A meander is called trough if it is towards poles and peak or ridge if it is towards equator.
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
4. Identify the conditions for formation of Tropical Cyclones:
- Large Sea Surface with temperature higher than 27 degree Celsius
- Presence of Coriolis force
- Existence of conditions of ITCZ
A. Only 1 and 2
B. Only 2 and 3
C. Only 1 and 3
D. 1, 2 and 3
UPSC- PYQ
5. Consider the following statements:
- The winds which blow between 30 N and 60 S latitudes throughout the year are known as westerlies.
- The moist air masses that cause winter rains in the North Western region of India are part of westerlies.
Which of the statements given above is/are correct?
A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2
Answers with Explanation
Questions from Crash Course
1. Choose the incorrect statement:
- Anabatic Winds – These Winds are upslope winds driven by warmer surface temperatures on a mountain slope than the surrounding air column.
- Katabatic Winds – Katabatic winds are downslope winds created when the mountain surface is colder than the surrounding air and creates a downslope wind.
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
Answer: D
Explanation
- Anabatic Winds – These Winds are upslope winds driven by warmer surface temperatures on a mountain slope than the surrounding air column.
- Katabatic Winds – Katabatic winds are downslope winds created when the mountain surface is colder than the surrounding air and creates a downslope wind.
2. Which of the following explains the role of airmasses in macro-climatic changes :
- The interaction of cold and warm air masses gives rise to extratropical cyclones and associated rainfalls.
- When air mass originates in the coastal areas, it contains more humid content which causes heavy precipitation.
- A hot dry airmass could give rise to devastating droughts as well as wildfires.
A. Only 1 and 2
B. Only 2 and 3
C. Only 1 and 3
D. 1, 2 and 3
Answer: D
Explanation
- The interaction of cold and warm air masses gives rise to extratropical cyclones and associated rainfalls.
- When air mass originates in the coastal areas, it contains more humid content which causes heavy precipitation.
- A hot dry airmass could give rise to devastating droughts as well as wildfires.
- Convectional Lifting – Vertical distribution of temperature
- Orographic Lifting – Air masses lifting over mountains , they change weather conditions and are known as Orographic Lifting .
- Discuss the concept of air mass and explain its role in macro-climatic changes (UPSC – 2016)
3. Choose the correct statements :
- Meandering in Jetstreams depends on temperature contrast .
- A meander is called trough if it is towards poles and peak or ridge if it is towards equator.
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
Answer: A
Explanation
- Meandering in Jetstreams depends on temperature contrast .
- A meander is called trough if it is towards equator and peak or ridge if it is towards piles.
4. Identify the conditions for formation of Tropical Cyclones:
- Large Sea Surface with temperature higher than 27 degree Celsius
- Presence of Coriolis force
- Existence of conditions of ITCZ
A. Only 1 and 2
B. Only 2 and 3
C. Only 1 and 3
D. 1, 2 and 3
Answer: D
Explanation
- Tropical cyclones are violent storms that originate over oceans in tropical areas and move over to the coastal areas bringing about large-scale destruction caused by violent winds, very heavy rainfall and storm surges.
The conditions favorable for the formation and intensification of tropical storms are:
- Large sea surface with temperature higher than 27° C;
- Presence of the Coriolis force;
- Small variations in the vertical wind speed;
- A pre-existing weak low-pressure area or low-level-cyclonic circulation;
- Upper divergence above the sea level system
- Existence of conditions of ITCZ
UPSC – PYQ
5. Consider the following statements:
- The winds which blow between 30 N and 60 S latitudes throughout the year are known as westerlies.
- The moist air masses that cause winter rains in the North Western region of India are part of westerlies.
Which of the statements given above is/are correct?
A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2
Answer: B
Explanation
- The Westerlies are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude.
- The moist air masses that cause winter rains in North-Western region of India are part of westerlies.
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