UPSC Static Quiz – Geography : 27 September 2024

UPSC Static Quiz – Geography : 27 September 2024 We will post 5 questions daily on static topics mentioned in the UPSC civil services preliminary examination syllabus. Each week will focus on a specific topic from the syllabus, such as History of India and Indian National Movement, Indian and World Geography, and more.We are excited to bring you our daily UPSC Static Quiz, designed to help you prepare for the UPSC Civil Services Preliminary Examination. Each day, we will post 5 questions on static topics mentioned in the UPSC syllabus. This week, we are focusing on Indian and World Geography.

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• Question 1 of 5 1. Question Consider the following statements about the influence of jet streams on weather patterns: Jet streams can help steer weather systems such as cyclones. They form at the boundaries of high and low pressure systems. Jet streams influence both summer and winter monsoon seasons in India. They generally blow at altitudes of 1-2 km. Which of the statements given above is/are correct? a) 1 and 3 only b) 2, 3, and 4 only c) 1, 2, and 3 only d) 1, 2, 3, and 4 Correct Solution: c) Jet streams are narrow bands of high-speed winds that play a critical role in global weather patterns, particularly due to their position in the upper troposphere at altitudes ranging from about 8 to 12 km above the Earth’s surface. These winds are significant because they can steer weather systems, including cyclones, across large distances. For instance, the movement and development of cyclones are influenced by the positioning of jet streams, particularly as they provide a steering mechanism for these large-scale weather systems. Therefore, statement 1 is correct. Jet streams form at the boundaries of different temperature zones, typically between cold polar air masses and warmer tropical air masses. These zones are often associated with significant pressure differences, resulting in the formation of high-speed winds along these boundaries. This mechanism explains why jet streams play a role in the formation of weather fronts and systems, making statement 2 correct as well. India’s monsoon, a critical climatic feature for the subcontinent, is influenced by both the sub-tropical westerly jet stream during the winter season and the equatorial easterly jet stream during the summer monsoon. The shifting of these jet streams in different seasons significantly impacts the weather patterns, particularly the onset and withdrawal of monsoons. Thus, statement 3 is also correct. However, jet streams operate at much higher altitudes than 1-2 km; they typically blow at altitudes ranging from 8 to 12 km above the Earth’s surface. This makes statement 4 incorrect. Incorrect Solution: c) Jet streams are narrow bands of high-speed winds that play a critical role in global weather patterns, particularly due to their position in the upper troposphere at altitudes ranging from about 8 to 12 km above the Earth’s surface. These winds are significant because they can steer weather systems, including cyclones, across large distances. For instance, the movement and development of cyclones are influenced by the positioning of jet streams, particularly as they provide a steering mechanism for these large-scale weather systems. Therefore, statement 1 is correct. Jet streams form at the boundaries of different temperature zones, typically between cold polar air masses and warmer tropical air masses. These zones are often associated with significant pressure differences, resulting in the formation of high-speed winds along these boundaries. This mechanism explains why jet streams play a role in the formation of weather fronts and systems, making statement 2 correct as well. India’s monsoon, a critical climatic feature for the subcontinent, is influenced by both the sub-tropical westerly jet stream during the winter season and the equatorial easterly jet stream during the summer monsoon. The shifting of these jet streams in different seasons significantly impacts the weather patterns, particularly the onset and withdrawal of monsoons. Thus, statement 3 is also correct. However, jet streams operate at much higher altitudes than 1-2 km; they typically blow at altitudes ranging from 8 to 12 km above the Earth’s surface. This makes statement 4 incorrect.

#### 1. Question

Consider the following statements about the influence of jet streams on weather patterns:

• Jet streams can help steer weather systems such as cyclones.

• They form at the boundaries of high and low pressure systems.

• Jet streams influence both summer and winter monsoon seasons in India.

• They generally blow at altitudes of 1-2 km.

Which of the statements given above is/are correct?

• a) 1 and 3 only

• b) 2, 3, and 4 only

• c) 1, 2, and 3 only

• d) 1, 2, 3, and 4

Solution: c)

Jet streams are narrow bands of high-speed winds that play a critical role in global weather patterns, particularly due to their position in the upper troposphere at altitudes ranging from about 8 to 12 km above the Earth’s surface. These winds are significant because they can steer weather systems, including cyclones, across large distances. For instance, the movement and development of cyclones are influenced by the positioning of jet streams, particularly as they provide a steering mechanism for these large-scale weather systems. Therefore, statement 1 is correct.

Jet streams form at the boundaries of different temperature zones, typically between cold polar air masses and warmer tropical air masses. These zones are often associated with significant pressure differences, resulting in the formation of high-speed winds along these boundaries. This mechanism explains why jet streams play a role in the formation of weather fronts and systems, making statement 2 correct as well.

India’s monsoon, a critical climatic feature for the subcontinent, is influenced by both the sub-tropical westerly jet stream during the winter season and the equatorial easterly jet stream during the summer monsoon. The shifting of these jet streams in different seasons significantly impacts the weather patterns, particularly the onset and withdrawal of monsoons. Thus, statement 3 is also correct.

However, jet streams operate at much higher altitudes than 1-2 km; they typically blow at altitudes ranging from 8 to 12 km above the Earth’s surface. This makes statement 4 incorrect.

Solution: c)

However, jet streams operate at much higher altitudes than 1-2 km; they typically blow at altitudes ranging from 8 to 12 km above the Earth’s surface. This makes statement 4 incorrect.

• Question 2 of 5 2. Question Consider the following statements regarding the sub-tropical westerly jet stream: It is active during the summer season in the northern hemisphere. It splits into two over the Indian subcontinent due to the Himalayan mountain system. It descends over the north-western part of India, causing atmospheric stability. How many of the above statements is/are correct? a) Only one b) Only two c) All three d) None Correct Solution: b) The sub-tropical westerly jet stream is a winter phenomenon in the northern hemisphere, not a summer one, making statement 1 incorrect. It splits into two over the Indian subcontinent due to the presence of the Himalayas, and the southern branch tends to descend over north-western India, leading to atmospheric stability, which makes statements 2 and 3 correct. Incorrect Solution: b) The sub-tropical westerly jet stream is a winter phenomenon in the northern hemisphere, not a summer one, making statement 1 incorrect. It splits into two over the Indian subcontinent due to the presence of the Himalayas, and the southern branch tends to descend over north-western India, leading to atmospheric stability, which makes statements 2 and 3 correct.

#### 2. Question

Consider the following statements regarding the sub-tropical westerly jet stream:

• It is active during the summer season in the northern hemisphere.

• It splits into two over the Indian subcontinent due to the Himalayan mountain system.

• It descends over the north-western part of India, causing atmospheric stability.

How many of the above statements is/are correct?

• a) Only one

• b) Only two

• c) All three

Solution: b)

The sub-tropical westerly jet stream is a winter phenomenon in the northern hemisphere, not a summer one, making statement 1 incorrect.

It splits into two over the Indian subcontinent due to the presence of the Himalayas, and the southern branch tends to descend over north-western India, leading to atmospheric stability, which makes statements 2 and 3 correct.

Solution: b)

The sub-tropical westerly jet stream is a winter phenomenon in the northern hemisphere, not a summer one, making statement 1 incorrect.

• Question 3 of 5 3. Question Match the following jet streams with their features: Jet Stream Features A. Sub-tropical westerly jet 1. Prominent during Indian monsoon B. Equatorial easterly jet 2. Splits due to the Himalayan mountains C. Polar front jet stream 3. Found in the polar region D. Tropical easterly jet stream 4. Associated with winter weather in India Options: a) A-2, B-4, C-3, D-1 b) A-4, B-1, C-2, D-3 c) A-4, B-2, C-3, D-1 d) A-4, B-1, C-3, D-2 Correct Solution: d) The sub-tropical westerly jet is associated with winter weather in India, the equatorial easterly jet is prominent during the monsoon season, the polar front jet stream is found in the polar region, and the tropical easterly jet stream splits due to the Himalayan mountain range. Incorrect Solution: d) The sub-tropical westerly jet is associated with winter weather in India, the equatorial easterly jet is prominent during the monsoon season, the polar front jet stream is found in the polar region, and the tropical easterly jet stream splits due to the Himalayan mountain range.

#### 3. Question

Match the following jet streams with their features:

Jet Stream | Features

A. Sub-tropical westerly jet | 1. Prominent during Indian monsoon

B. Equatorial easterly jet | 2. Splits due to the Himalayan mountains

C. Polar front jet stream | 3. Found in the polar region

D. Tropical easterly jet stream | 4. Associated with winter weather in India

• a) A-2, B-4, C-3, D-1

• b) A-4, B-1, C-2, D-3

• c) A-4, B-2, C-3, D-1

• d) A-4, B-1, C-3, D-2

Solution: d)

The sub-tropical westerly jet is associated with winter weather in India, the equatorial easterly jet is prominent during the monsoon season, the polar front jet stream is found in the polar region, and the tropical easterly jet stream splits due to the Himalayan mountain range.

Solution: d)

• Question 4 of 5 4. Question Consider the following statements about Western Disturbances: They cause unseasonal rainfall in northern India during the winter months. They help in maintaining moderate winter temperatures across the Indian subcontinent. They originate as extra-tropical cyclones in the Mediterranean region. They bring cold wave conditions to southern India during the monsoon. How many of the above statements is/are correct? a) Only one b) Only two c) Only three d) All four Correct Solution: b) Western Disturbances are extra-tropical storms that originate in the Mediterranean region. These disturbances travel from west to east under the influence of westerly winds in the upper atmosphere and primarily affect the weather patterns of northern India during the winter months. The term “disturbance” refers to areas of low pressure, which promote cloud formation and precipitation. These disturbances bring unseasonal rainfall, especially during the Rabi cropping season, which is crucial for crops like wheat. They are formed when cold air from the Polar Regions interacts with relatively warmer moist air from the Mediterranean or Atlantic Ocean, creating conditions conducive to cyclogenesis. While Western Disturbances play a vital role in maintaining winter precipitation patterns, they also bring significant risks. The excessive rainfall can lead to floods, avalanches, and landslides in the Himalayan region. They also cause higher night temperatures, cloud cover, and fog, particularly in northern India. However, their effects are not evenly distributed across the Indian subcontinent. The disturbances typically affect northern and north-western India but do not significantly impact southern or central India’s winter climate, which is why statements 2 and 4 are incorrect. Incorrect Solution: b) Western Disturbances are extra-tropical storms that originate in the Mediterranean region. These disturbances travel from west to east under the influence of westerly winds in the upper atmosphere and primarily affect the weather patterns of northern India during the winter months. The term “disturbance” refers to areas of low pressure, which promote cloud formation and precipitation. These disturbances bring unseasonal rainfall, especially during the Rabi cropping season, which is crucial for crops like wheat. They are formed when cold air from the Polar Regions interacts with relatively warmer moist air from the Mediterranean or Atlantic Ocean, creating conditions conducive to cyclogenesis. While Western Disturbances play a vital role in maintaining winter precipitation patterns, they also bring significant risks. The excessive rainfall can lead to floods, avalanches, and landslides in the Himalayan region. They also cause higher night temperatures, cloud cover, and fog, particularly in northern India. However, their effects are not evenly distributed across the Indian subcontinent. The disturbances typically affect northern and north-western India but do not significantly impact southern or central India’s winter climate, which is why statements 2 and 4 are incorrect.

#### 4. Question

Consider the following statements about Western Disturbances:

• They cause unseasonal rainfall in northern India during the winter months.

• They help in maintaining moderate winter temperatures across the Indian subcontinent.

• They originate as extra-tropical cyclones in the Mediterranean region.

• They bring cold wave conditions to southern India during the monsoon.

How many of the above statements is/are correct?

• a) Only one

• b) Only two

• c) Only three

• d) All four

Solution: b)

Western Disturbances are extra-tropical storms that originate in the Mediterranean region. These disturbances travel from west to east under the influence of westerly winds in the upper atmosphere and primarily affect the weather patterns of northern India during the winter months. The term “disturbance” refers to areas of low pressure, which promote cloud formation and precipitation. These disturbances bring unseasonal rainfall, especially during the Rabi cropping season, which is crucial for crops like wheat. They are formed when cold air from the Polar Regions interacts with relatively warmer moist air from the Mediterranean or Atlantic Ocean, creating conditions conducive to cyclogenesis.

While Western Disturbances play a vital role in maintaining winter precipitation patterns, they also bring significant risks. The excessive rainfall can lead to floods, avalanches, and landslides in the Himalayan region. They also cause higher night temperatures, cloud cover, and fog, particularly in northern India. However, their effects are not evenly distributed across the Indian subcontinent. The disturbances typically affect northern and north-western India but do not significantly impact southern or central India’s winter climate, which is why statements 2 and 4 are incorrect.

Solution: b)

• Question 5 of 5 5. Question Consider the following statements about the impact of the southwest monsoon: The southwest monsoon is responsible for the majority of annual rainfall in India. The intensity of monsoon rainfall increases with distance from the sea. Monsoonal rainfall is crucial for the Kharif crops in India. Breaks in the monsoon often coincide with cyclonic activity in the Bay of Bengal. Which of the statements given above is/are correct? a) 1, 3, and 4 only b) 2 and 3 only c) 1 and 4 only d) 1, 2, 3, and 4 Correct Solution: a) The southwest monsoon brings most of India’s rainfall and is essential for Kharif crops. Breaks in the monsoon often coincide with cyclonic activity in the Bay of Bengal. However, rainfall decreases with increasing distance from the sea, making statement 2 incorrect. Incorrect Solution: a) The southwest monsoon brings most of India’s rainfall and is essential for Kharif crops. Breaks in the monsoon often coincide with cyclonic activity in the Bay of Bengal. However, rainfall decreases with increasing distance from the sea, making statement 2 incorrect.

#### 5. Question

Consider the following statements about the impact of the southwest monsoon:

• The southwest monsoon is responsible for the majority of annual rainfall in India.

• The intensity of monsoon rainfall increases with distance from the sea.

• Monsoonal rainfall is crucial for the Kharif crops in India.

• Breaks in the monsoon often coincide with cyclonic activity in the Bay of Bengal.

Which of the statements given above is/are correct?

• a) 1, 3, and 4 only

• b) 2 and 3 only

• c) 1 and 4 only

• d) 1, 2, 3, and 4

Solution: a)

The southwest monsoon brings most of India’s rainfall and is essential for Kharif crops. Breaks in the monsoon often coincide with cyclonic activity in the Bay of Bengal. However, rainfall decreases with increasing distance from the sea, making statement 2 incorrect.

Solution: a)

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