Rainfall Distribution
Rainfall Distribution
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quiz Questions
Q41
Under the Trewartha climate classification system, which macro-climatic letter code corresponds to the tropical semi-arid steppe zone running through the rain-shadow region of the Western Ghats?
Aw
BS
Am
Cf
Explanation
In Trewartha's modified classification, 'BS' represents the tropical semi-arid steppe climate, which describes the long interior dry belt of the Indian Peninsula shielded by the Western Ghats.
Q42
Which thermodynamic process explains why the descending air mass on the eastern side of the Western Ghats experiences a sharp drop in relative humidity, creating a rain-shadow zone?
Adiabatic Expansion Cooling
Adiabatic Compression Heating
Latent Heat Dissipation via Sublimation
Radiative Boundary Layer Inversion
Explanation
As the air mass descends the leeward side of the mountains, it undergoes adiabatic compression heating. This raises its temperature and expands its moisture capacity, rapidly lowering its relative humidity and stopping rainfall.
Q43
During the post-monsoon retreating cycle in October, why do severe convective tropical depressions frequently track into the coastal deltas of Andhra Pradesh and Odisha rather than Gujarat?
The Arabian Sea maintains a permanent freezing surface current
The high thermal energy and upper-level steering in the Bay of Bengal direct cyclones westward
The Aravalli Range acts as a thermal magnet to repel cyclones completely
The Coriolis Force drops to zero over the western shoreline of India
Explanation
The high surface water temperature and low-pressure cell layout in the Bay of Bengal during autumn trigger multiple cyclonic systems that are steered westward into the east coast by the easterly upper air currents.
Q44
Which of the following spatial zones in India records the highest relative variability of annual rainfall, making its agriculture highly vulnerable to frequent droughts?
The Brahmaputra Valley Plain
Western Rajasthan and Kachchh
The Malabar Coastal Strip
The Northeast Frontier Hills
Explanation
Areas with low annual rainfall, such as Western Rajasthan, Kachchh, and the rain-shadow regions of the Western Ghats, experience the highest relative rainfall variability (often exceeding 50%).
Q45
Which structural geographic feature acts as the primary barrier preventing the warm and humid summer monsoon air masses from traveling directly north into Tibet and Central Asia?
The Karakoram Highway Ridge
The Himalayan Mountain Wall
The Kunlun Shan Margin
The Hindu Kush block
Explanation
The high altitudinal physical mass of the Himalayas prevents the northward penetration of the southwest monsoon winds, ensuring that their moisture contents are released entirely over the Indian subcontinent.
Q46
According to the Koeppen climate classification system, which symbol represents the polar or mountain type of climate found across the high-altitude regions of Jammu & Kashmir, Himachal Pradesh, and Uttarakhand?
Cwg
E
Dfc
Bwkw
Explanation
Koeppen uses the uppercase symbol 'E' to denote the Polar or Tundra type of climate, which accurately describes the high alpine zones of the Indian Himalayan states.
Q47
The sudden arrival of heavy convective rainfall accompanied by violent thunder in the southern peninsula during mid-to-late May is meteorologically termed by what expression?
Monsoon Retraction Phase
Pre-monsoon Convective Showers
Western Disturbance Spill
Subtropical Anticyclonic Surge
Explanation
Pre-monsoon showers that occur in May before the formal arrival of the monsoon are driven by intense local convective activity and are frequently called Mango Showers or Blossom Showers.
Q48
Which of the following spatial locations tracks a true desert type of climate (Bwwh) under the standard Koeppen mapping of the Indian subcontinent?
The Konkan Plain core
Western Rajasthan / Thar Desert
The Chota Nagpur interior margin
The Nilgiri high plateau slopes
Explanation
The symbol 'Bwwh' represents a hot desert climate, which dominates the westernmost parts of Rajasthan, including Jaisalmer and Bikaner districts.
Q49
Which of the following regional stations records the highest annual rainfall variation, reflecting the least reliable seasonal cycle?
Thiruvananthapuram
Mawsynram
Jaisalmer
Kolkata
Explanation
Jaisalmer, situated in the arid core of the Thar Desert, exhibits extreme annual variability in rainfall, often exceeding 50% from one year to the next.
Q50
Which structural line defines the meeting zone where the Arabian Sea and Bay of Bengal branches of the southwest monsoon converge over central northern India?
The Tropic of Cancer
The Monsoon Trough Axis
The Subtropical Ridge Line
The Malda Fault line
Explanation
The axis of the Monsoon Trough over the Indo-Gangetic plains acts as the zone of convergence where the moisture-laden flows from both marine branches meet.