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07th October 2024 Quiz for UPSC Prelims
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You have reached 0 of 0 points, (0) Which among the following affect the behaviour of the monsoon over India? 1. Subtropical westerly jetstream Choose the correct option from the codes given below: With reference to the Northeast monsoon, consider the following statements: 1. About 75 per cent of the country’s annual rainfall is received from the Northeast monsoon between June and September. Which of the statements given above is/are correct? Explanation: Explanation: Which of the following adds/add nitrogen to the soil: 1) Burning of coal by man Select the correct answer code: Solution: (C) o Burning of coal by man is the main source of atmospheric carbon dioxide. Solution: (C) o Burning of coal by man is the main source of atmospheric carbon dioxide. Which of the following correctly describes the phenomenon of ‘Break in the Monsoon’? Explanation: Explanation: Which of the following causes the complete reversal of North Indian Ocean currents between summer and winter? Explanation: Explanation: Winter monsoons do not cause rainfall in most parts of India because: 1. They do not have adequate humidity to cause rainfall. Select the correct answer using the code given below. Explanation: A monsoon is a seasonal change in the direction of the prevailing, or strongest, winds of a region. Monsoons cause wet and dry seasons throughout much of the tropics. Monsoons always blow from cold to warm regions.Winter monsoons last from October to April. The dry winter monsoon blows from the northeast. These winds start in the air above Mongolia and northwestern China. The Himalayas prevent much of the cool air from reaching places like southern India and Sri Lanka, keeping them warm all year. They do not cause rainfall in most parts of India because: they have little humidity as they move from land to the sea ; due to anticyclonic circulation (high-pressure center) on land, the possibility of rainfall from them reduces. So, most parts of India do not have rainfall in the winter season. Winter monsoons are sometimes associated with droughts. Explanation: A monsoon is a seasonal change in the direction of the prevailing, or strongest, winds of a region. Monsoons cause wet and dry seasons throughout much of the tropics. Monsoons always blow from cold to warm regions.Winter monsoons last from October to April. The dry winter monsoon blows from the northeast. These winds start in the air above Mongolia and northwestern China. The Himalayas prevent much of the cool air from reaching places like southern India and Sri Lanka, keeping them warm all year. They do not cause rainfall in most parts of India because: they have little humidity as they move from land to the sea ; due to anticyclonic circulation (high-pressure center) on land, the possibility of rainfall from them reduces. So, most parts of India do not have rainfall in the winter season. Winter monsoons are sometimes associated with droughts. Consider the following statements with respect to Mascarene High: 1. It is a high-pressure area located near the Mascarene Islands in the southern Indian Ocean. Which of the statements given above is/are correct? Explanation: Mascarene High: This high-pressure region located between 25°S-35°S and 40°E-90°E near the Mascarene Islands in the southern Indian Ocean is a source of Southwest monsoon in India. Hence, statement 1 is correct. Since, it is a high pressure area, it is also known as Mascarene high. This is responsible for crossequatorial flow through south Arabian Sea and it acts as southern hemispheric linkage. The variation in the intensity of High Pressure causes monsoon surges across equatorial flow. These surges are responsible for heavy rains along the west coast.If there is a delay in the formation of Mascarene High there is a possibility of delay in the onset of Indian Monsoon. Hence, statement 2 is correct. Explanation: Mascarene High: This high-pressure region located between 25°S-35°S and 40°E-90°E near the Mascarene Islands in the southern Indian Ocean is a source of Southwest monsoon in India. Hence, statement 1 is correct. Since, it is a high pressure area, it is also known as Mascarene high. This is responsible for crossequatorial flow through south Arabian Sea and it acts as southern hemispheric linkage. The variation in the intensity of High Pressure causes monsoon surges across equatorial flow. These surges are responsible for heavy rains along the west coast.If there is a delay in the formation of Mascarene High there is a possibility of delay in the onset of Indian Monsoon. Hence, statement 2 is correct. Consider the following statements with respect to Monsoon Trough: 1. Monsoon Trough is an elongated highpressure area. Which of the statements given above is/are not correct? Explanation: Monsoon Trough: It is an elongated low-pressure area which extends from heat low over Pakistan to Head Bay of Bengal. Hence, statement 1 is not correct. This is one of semi-permanent feature of monsoon circulation. Monsoon trough may be a characteristic of east west orientation of Himalayan ranges and north south orientation of Khasi-Jaintia Hills. Generallyeastern side of monsoon trough oscillates, sometimes southwards and sometimes northwards. Southward migration results in active/vigorous monsoon over major part of India.In contrast, the northward migration of this trough leads to breakdown of monsoon condition over major part of India and heavy rains along foothills of Himalayas and sometimes floods in Brahmaputra river. Hence, statement 2 is not correct. Explanation: Monsoon Trough: It is an elongated low-pressure area which extends from heat low over Pakistan to Head Bay of Bengal. Hence, statement 1 is not correct. This is one of semi-permanent feature of monsoon circulation. Monsoon trough may be a characteristic of east west orientation of Himalayan ranges and north south orientation of Khasi-Jaintia Hills. Generallyeastern side of monsoon trough oscillates, sometimes southwards and sometimes northwards. Southward migration results in active/vigorous monsoon over major part of India.In contrast, the northward migration of this trough leads to breakdown of monsoon condition over major part of India and heavy rains along foothills of Himalayas and sometimes floods in Brahmaputra river. Hence, statement 2 is not correct. Why does the Tamil Nadu coast remain dry during southwest monsoon? 1. It is situated parallel to the Bay of Bengal branch of southwest monsoon. Select the correct answer using the code given below. Explanation: The Southwest monsoon approaches the Indian landmass in two branches: Explanation: The Southwest monsoon approaches the Indian landmass in two branches: Which of the following are the reasons for the break in the monsoon in India? 1. In northern India, the rain-bearing storms are not very frequent along the ITCZ. Select the correct answer using the code given below. Explanation: During the south-west monsoon period after having rained for a few days, if rain fails to occur for one or more weeks, it is known as break in the monsoon.These breaks in the different regions are due to different reasons: In northern India, rains are likely to break if the rain-bearing storms are not very frequent along the monsoon trough or the Inter-Tropical Convergence Zone over this region. Over the west coast, the dry spells are associated with days when winds blow parallel to the coast. Hence, statement 1 and 2 are correct. The occurrence of El-Nino leads to delay or complete failure of monsoon and not break in the monsoon. Hence, statement 3 is not correct. Explanation: During the south-west monsoon period after having rained for a few days, if rain fails to occur for one or more weeks, it is known as break in the monsoon.These breaks in the different regions are due to different reasons: In northern India, rains are likely to break if the rain-bearing storms are not very frequent along the monsoon trough or the Inter-Tropical Convergence Zone over this region. Over the west coast, the dry spells are associated with days when winds blow parallel to the coast. Hence, statement 1 and 2 are correct. The occurrence of El-Nino leads to delay or complete failure of monsoon and not break in the monsoon. Hence, statement 3 is not correct.
07th October 2024
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1. Question
2 points
2. Tropical easterly jet stream
3. El Nino and La Nina
4. Indian Ocean Dipole
5. Anthropogenic aerosols
2. Question
2 points
2. While La Niña conditions enhance the rainfall associated with the Southwest monsoon, it has a
negative impact on rainfall associated with the Northeast monsoon.
The Northeast monsoon has remained subdued this year. Rainfall over the Southern peninsular region has been deficient so far. The reason is a prevalent La Niña condition, along with a low pressure belt that is currently lying to the north of its normal position.
India receives rainfall during two seasons. About 75 per cent of the country’s annual rainfall is received from the Southwest monsoon between June and September. The Northeast monsoon, on the other hand, occurs during October to December, and is a comparatively small-scale monsoon, which is confined to the Southern peninsula. Also called the winter monsoon, the rainfall associated with the Northeast monsoon is important for Tamil Nadu, Puducherry, Karaikal, Yanam, coastal Andhra Pradesh, Kerala, north interior Karnataka, Mahe and Lakshadweep.
How is La Niña linked with the Northeast monsoon?
While La Niña conditions enhance the rainfall associated with the Southwest monsoon, it has a negative impact on rainfall associated with the Northeast monsoon. during La Niña years, the synoptic systems — low pressure or cyclones — formed in the Bay of Bengal remain significantly to the north of their normal position. Besides, instead of moving westwards, these systems recurve. As they lie to the north of their normal position, not much rainfall occurs over southern regions like Tamil Nadu.
Hence only statement 2 is correct.
The Northeast monsoon has remained subdued this year. Rainfall over the Southern peninsular region has been deficient so far. The reason is a prevalent La Niña condition, along with a low pressure belt that is currently lying to the north of its normal position.
India receives rainfall during two seasons. About 75 per cent of the country’s annual rainfall is received from the Southwest monsoon between June and September. The Northeast monsoon, on the other hand, occurs during October to December, and is a comparatively small-scale monsoon, which is confined to the Southern peninsula. Also called the winter monsoon, the rainfall associated with the Northeast monsoon is important for Tamil Nadu, Puducherry, Karaikal, Yanam, coastal Andhra Pradesh, Kerala, north interior Karnataka, Mahe and Lakshadweep.
How is La Niña linked with the Northeast monsoon?
While La Niña conditions enhance the rainfall associated with the Southwest monsoon, it has a negative impact on rainfall associated with the Northeast monsoon. during La Niña years, the synoptic systems — low pressure or cyclones — formed in the Bay of Bengal remain significantly to the north of their normal position. Besides, instead of moving westwards, these systems recurve. As they lie to the north of their normal position, not much rainfall occurs over southern regions like Tamil Nadu.
Hence only statement 2 is correct.
3. Question
2 points
2) Death of vegetation
3) Excretion of urea by animals
o It has nothing to do with adding nitrogen to the soil.
o Nitrogenous waste products of living organisms such as urea and dead remain of organisms are converted back into inorganic ammonia by the bacteria.
o It has nothing to do with adding nitrogen to the soil.
o Nitrogenous waste products of living organisms such as urea and dead remain of organisms are converted back into inorganic ammonia by the bacteria.
4. Question
2 points
When the trade winds approach the land, their southwesterly direction is modified by the relief and thermal low pressure over northwest India. The monsoon approaches the landmass in two branches i.e Arabian Sea branch & Bay of Bengal branch.
Break/Burst of the Monsoon
The rain in the southwest monsoon season begins rather abruptly. One result of the first rain is that it brings down the temperature substantially. This sudden onset of the moisture-laden winds associated with violent thunder and lightning is often termed as the “break” or “burst” of the monsoon
Break in the Monsoon
If rain fails to occur for one or more weeks during the south-west monsoon period after having rained for a few days. These breaks in the different regions are due to different reasons: In northern India, rains are likely to fail if the rain-bearing storms are not very frequent along the monsoon trough or the ITCZ over this region. Over the west coast, the dry spells are associated with days when winds blow parallel to the coast.
When the trade winds approach the land, their southwesterly direction is modified by the relief and thermal low pressure over northwest India. The monsoon approaches the landmass in two branches i.e Arabian Sea branch & Bay of Bengal branch.
Break/Burst of the Monsoon
The rain in the southwest monsoon season begins rather abruptly. One result of the first rain is that it brings down the temperature substantially. This sudden onset of the moisture-laden winds associated with violent thunder and lightning is often termed as the “break” or “burst” of the monsoon
Break in the Monsoon
If rain fails to occur for one or more weeks during the south-west monsoon period after having rained for a few days. These breaks in the different regions are due to different reasons: In northern India, rains are likely to fail if the rain-bearing storms are not very frequent along the monsoon trough or the ITCZ over this region. Over the west coast, the dry spells are associated with days when winds blow parallel to the coast.
5. Question
2 points
In the North India Ocean, there is a complete reversal of the direction of currents between summer and winter, due to the changes of monsoon winds. In summer from June to October, when the dominant wind is the South-West Monsoon, the currents are blown from a south-westerly direction as the South West Monsoon Drift. This is reverse in winter beginning from December, when the North-East Monsoon blows the currents from the north-east as the North-East Monsoon Drift. The currents of the North Indian Ocean, demonstrate most convincingly the dominant effects of winds on the circulation of ocean currents
In the North India Ocean, there is a complete reversal of the direction of currents between summer and winter, due to the changes of monsoon winds. In summer from June to October, when the dominant wind is the South-West Monsoon, the currents are blown from a south-westerly direction as the South West Monsoon Drift. This is reverse in winter beginning from December, when the North-East Monsoon blows the currents from the north-east as the North-East Monsoon Drift. The currents of the North Indian Ocean, demonstrate most convincingly the dominant effects of winds on the circulation of ocean currents
6. Question
2 points
2. Anticyclonic circulation on land reduces the possibility of rainfall.
7. Question
2 points
2. Arrival of Indian Monsoon may be delayed due to delays in the formation of Mascarene High.
8. Question
2 points
2. Northward migration of Monsoon Trough results in active monsoon over major parts of India.
9. Question
2 points
2. Low-pressure conditions due to high temperature.
3. It lies in the rainshadow area of the Arabian Sea branch of the south-west monsoon.
The Arabian Sea branch
Its different sub-branches cause rainfall in the windward side of western ghats, Central India, Saurashtra Peninsula, Kachchh and parts of Haryana and Punjab.
The Bay of Bengal branch
It causes rainfall in West Bengal, North Eastern states and Gangetic plains.
Tamil Nadu coast remains dry during this season. There are two factors responsible for it: The Tamil Nadu coast is situated parallel to the Bay of Bengal branch of southwest monsoon. It lies in the rainshadow area of the Arabian Sea branch of the south-west monsoon.
The Arabian Sea branch
Its different sub-branches cause rainfall in the windward side of western ghats, Central India, Saurashtra Peninsula, Kachchh and parts of Haryana and Punjab.
The Bay of Bengal branch
It causes rainfall in West Bengal, North Eastern states and Gangetic plains.
Tamil Nadu coast remains dry during this season. There are two factors responsible for it: The Tamil Nadu coast is situated parallel to the Bay of Bengal branch of southwest monsoon. It lies in the rainshadow area of the Arabian Sea branch of the south-west monsoon.
10. Question
2 points
2. Winds blow parallel to the west coast.
3. Occurrence of El-Nino.
07th October 2024 Quiz for UPSC Prelims
07th October 2024