What is the direction of winds in the 'Northeast Monsoon'?
- Land to Sea
- West to East
- Sea to Land
- South to North
Explanation: The Northeast monsoon involves winds blowing from the high-pressure landmass toward the low-pressure sea.
What is the primary source of moisture for the Bay of Bengal branch?
- Arabian Sea
- Pacific Ocean
- Bay of Bengal
- Indian Ocean
Explanation: While the origin is the Southern Indian Ocean, this branch picks up moisture specifically from the Bay of Bengal.
The direction of the retreating monsoon in India is?
- South-East
- South-West
- North-East
- North-West
Explanation: As the sun moves south, the pressure gradient reverses, and winds blow from the Northeast toward the sea.
Intense heating of which landmass acts as a thermal engine for the monsoon?
- Arakan Yoma
- Iranian Plateau
- Deccan Plateau
- Tibetan Plateau
Explanation: The heating of the Tibetan Plateau creates a high-pressure cell in the upper troposphere, driving the Tropical Easterly Jet.
Which factor prevents the Aravalli range from inducing heavy rainfall in Rajasthan?
- Lack of forests
- Parallel orientation
- Extreme height
- Distance from sea
Explanation: The Aravalli range lies parallel to the Arabian Sea branch of the monsoon, allowing moisture to pass without lifting.
Which ocean current is replaced by the El Niño warm current?
- Benguela Current
- Canary Current
- Agulhas Current
- Humboldt Current
Explanation: El Niño involves the warming of waters off the coast of Peru, replacing the cold Humboldt Current.
Which region receives the least rainfall from the Southwest Monsoon?
- Western Ghats
- Kerala
- Ladakh
- Meghalaya
Explanation: Ladakh lies in the rain shadow of the Himalayas, making it a high-altitude cold desert.
Why does the Arabian Sea branch strike the Western Ghats perpendicularly?
- Earth's tilt
- Magnetic pull
- Jet stream speed
- Coastline orientation
Explanation: The Western Ghats run North-South, directly intercepting the Southwest winds coming from the Arabian Sea.
The 'Southern Oscillation' refers to pressure changes between which two locations?
- Tahiti and Darwin
- Tokyo and Mumbai
- Perth and Chennai
- Cairo and Delhi
Explanation: The Southern Oscillation Index (SOI) measures the air pressure difference between Tahiti (Pacific) and Darwin (Indian Ocean).
Madden-Julian Oscillation (MJO) is characterized as what type of phenomenon?
- Stationary wave
- Polar vortex
- Static pressure
- Moving disturbance
Explanation: The MJO is a traveling pattern of clouds, rainfall, and winds that moves eastward along the equator.
The seasonal reversal of winds is the primary definition of which term?
- Westerlies
- Monsoon
- Jet streams
- Trade winds
Explanation: Derived from the Arabic word 'Mausim', monsoon refers to the rhythmic seasonal reversal of wind direction.
Which month is considered the peak of the Southwest Monsoon season in India?
- November
- September
- July
- May
Explanation: July and August are the months with the highest rainfall and the most established monsoon circulation.
The 'October Heat' phenomenon is a transition between which two seasons?
- Winter and Summer
- Monsoon and Winter
- Spring and Summer
- Summer and Monsoon
Explanation: Characterized by high temperature and humidity, it occurs during the retreat of the Southwest Monsoon.
What happens to the Subtropical Westerly Jet during the monsoon onset?
- Becomes Easterly
- Moves Southward
- Strengthens significantly
- Withdraws Northward
Explanation: The sudden northward shift of the STWJ to the north of the Himalayas is associated with the 'burst' of the monsoon.
The 'Break' in the monsoon leads to a sharp increase in rainfall in which area?
- Tamil Nadu
- Rajasthan
- Himalayan foothills
- Western Ghats, Kerala
Explanation: During a break, the monsoon trough moves north, causing heavy rains in the Himalayas and dry spells in the plains.
What is the average duration of the Southwest Monsoon in India?
- 30-60 days
- 100-120 days
- 240-260 days
- 180-200 days
Explanation: The monsoon usually lasts from early June to mid-September, roughly 100 to 120 days.
What happens to the pressure over North India during winter?
- Remains constant
- It decreases
- Becomes zero
- It increases
Explanation: Cold temperatures over the landmass cause air to become dense, creating a high-pressure zone in winter.
Which high-pressure cell near Madagascar significantly influences the Indian Monsoon?
- Pacific High
- Mascarene High
- Azores High
- Australian High
Explanation: Located at approximately 20°S in the Indian Ocean, its intensity determines the strength of the cross-equatorial flow.
Consider: 1. The ITCZ remains fixed at the Equator year-round. 2. In summer, it shifts to the Ganga plains.
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: The Inter-Tropical Convergence Zone (ITCZ) is not fixed; it shifts northward in summer to approximately 20°N-25°N over India.
The 'Bardoli Chheerha' is a local pre-monsoon storm found in which state?
- Assam
- Gujarat
- Kerala
- Punjab
Explanation: Bardoli Chheerha (or Bordoisila) are violent evening thunderstorms in Assam that precede the main monsoon.
The 'Findlater Jet' is another name for which influential wind system?
- Somali Jet
- Westerly Jet
- Polar Jet
- Tropical Easterly Jet
Explanation: The Somali Jet (low-level cross-equatorial jet) strengthens the moisture carry-over from the Southern Indian Ocean.
The presence of which feature over the Himalayas inhibits the monsoon onset?
- Loo winds
- Easterly Jet
- ITCZ
- Westerly Jet
Explanation: The Subtropical Westerly Jet must move north of the Himalayas before the Southwest monsoon can establish itself over India.
The 'Break' in monsoon is primarily caused by the shift of which feature?
- Mascarene high
- Easterly jet
- Somali current
- Monsoon trough
Explanation: When the monsoon trough moves closer to the Himalayas, rainfall decreases over the plains and increases in the mountains.
Which of the following describes the moisture content of the Northeast Monsoon?
- Highly humid
- Mostly dry
- Saturated
- Maritime only
Explanation: Since it blows from land to sea, the Northeast monsoon is generally dry, except where it crosses the Bay of Bengal.
Which coast in India remains largely dry during the Southwest Monsoon?
- Canara Coast
- Malabar Coast
- Konkan Coast
- Coromandel Coast
Explanation: The Coromandel coast lies parallel to the Bay of Bengal branch and in the rain shadow of the Arabian Sea branch.
Which city receives rainfall from both branches of the Southwest Monsoon?
- Mumbai
- Chennai
- Kolkata
- Delhi
Explanation: Delhi generally receives rainfall from both the Arabian Sea and the Bay of Bengal branches as they merge over the plains.
The 'Findlater Jet' is located at which height?
- Middle troposphere
- Upper troposphere
- Lower troposphere
- Stratosphere
Explanation: The Somali Jet (Findlater Jet) is a low-level jet stream, typically found around 1.5 km altitude.
The 'Nor'westers' of West Bengal are most frequent in which months?
- October-November
- April-May
- July-August
- January-February
Explanation: Kalbaisakhi (Nor'westers) are pre-monsoon thunderstorms occurring in the peak summer months of April and May.
Which specific branch of the monsoon causes heavy rainfall in the Mawsynram region?
- Western Disturbances
- Arabian Sea
- Bay of Bengal
- Northeast Monsoon
Explanation: The Bay of Bengal branch is funneled into the Khasi Hills, causing record-breaking orographic rainfall in Mawsynram.
Tropical Easterly Jet (TEJ) is located in which atmospheric layer?
- Mesosphere
- Lower troposphere
- Stratosphere
- Upper troposphere
Explanation: The TEJ flows at high altitudes (around 14-16 km) from east to west over the Indian peninsula.
Which factor creates the 'rain-shadow' effect in the Deccan Plateau?
- Satpura Range
- Western Ghats
- Vindhya Range
- Eastern Ghats
Explanation: The leeward side of the Western Ghats receives significantly less rainfall than the windward side.
A 'Positive Indian Ocean Dipole' (IOD) is characterized by warmer water in the...
- Bay of Bengal
- Eastern Indian Ocean
- Western Indian Ocean
- South China Sea
Explanation: A Positive IOD involves warmer-than-normal sea surface temperatures in the western Indian Ocean near Africa.
The ITCZ is a zone of?
- Divergent winds
- Subsiding air
- Low pressure
- High pressure
Explanation: The Inter-Tropical Convergence Zone is where trade winds from both hemispheres converge, leading to rising air.
The burst of the monsoon is marked by a sudden increase in?
- Temperature
- Wind speed
- Pressure
- Rainfall intensity
Explanation: A 'burst' refers to the sudden onset of heavy rain accompanied by thunder and lightning.
Which branch of the monsoon causes rainfall in the Andaman and Nicobar Islands first?
- Arabian Sea
- Western Disturbances
- Bay of Bengal
- Retreating Monsoon
Explanation: Due to their location, the Andaman and Nicobar Islands receive the monsoon usually in the last week of May.
The 'Loo' is a characteristic wind of which season?
- Retreating Monsoon
- Cold Weather
- Hot Weather
- Monsoon
Explanation: The Loo is a hot, dry, and dusty wind blowing in the Northern and Northwestern plains of India.
Consider: 1. The Arabian Sea branch is stronger than the Bay of Bengal branch. 2. The entire Indian peninsula is a rain shadow area.
- 2 only
- 1 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: The Arabian Sea branch is significantly more powerful; however, only the leeward side of the Western Ghats is a rain shadow, not the whole peninsula.
Monsoon rainfall in India is primarily of which nature?
- Convectional
- Cyclonic
- Orographic
- Frontal
Explanation: Most monsoon rainfall is induced by relief (mountains) like the Western Ghats and the Himalayas.
Which phenomenon is known to delay the onset of the Indian Monsoon?
- Positive IOD
- Tibetan heating
- El Niño
- La Niña
Explanation: El Niño conditions often cause a sluggish start or a delay in the onset of the Southwest monsoon.
Consider: 1. STWJ moves north of Himalayas in summer. 2. TEJ originates over the Tibetan Plateau.
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: The withdrawal of the Sub-Tropical Westerly Jet (STWJ) from the Indian plains and the onset of the Tropical Easterly Jet (TEJ) are key triggers for the monsoon.
Which state's rainfall is most affected by a 'Negative' IOD?
- Sikkim
- Entire India
- Jammu Kashmir
- Arunachal Pradesh
Explanation: A negative IOD generally suppresses the monsoon rainfall across the whole Indian subcontinent.
Which force is responsible for the deflection of Trade Winds toward India?
- Centrifugal force
- Coriolis force
- Frictional force
- Gravitational force
Explanation: Upon crossing the equator, SE trade winds are deflected to the right by the Coriolis force, becoming SW monsoon winds.
What is the primary cause of the 'Equatorial Counter Current'?
- Deep sea vents
- Coriolis force
- Magnetic tilt
- Water piling up
Explanation: Trade winds pile up water on the western side of oceans; the counter current flows east to balance this accumulation.
The 'retreating' monsoon provides significant rainfall to which Indian state?
- Bihar
- Punjab
- Gujarat
- Tamil Nadu
Explanation: The Northeast (retreating) monsoon picks up moisture from the Bay of Bengal and provides most of Tamil Nadu's annual rain.
The 'withdrawal' of the monsoon begins first from which part of India?
- Southern Peninsula
- Central India
- Northwest India
- Northeast India
Explanation: The monsoon typically starts its retreat from Northwest India (Rajasthan) by early September.
Which Indian state is usually the first to receive the 'mainland' monsoon?
- Maharashtra
- Kerala
- Goa
- Tamil Nadu
Explanation: The Southwest monsoon usually reaches the Kerala coast by June 1st.
Which mountain range causes the monsoon winds to deflect toward the Ganga valley?
- Satpura Range
- Arakan Yoma
- Aravalli Range
- Western Ghats
Explanation: The Arakan mountains in Myanmar deflect the Bay of Bengal branch of the monsoon toward the Indian subcontinent.
Which wind system brings winter rainfall to Northwest India?
- Trade Winds
- Southwest Monsoon
- Western Disturbances
- Northeast Monsoon
Explanation: These are extratropical cyclones originating in the Mediterranean region, crucial for Rabi crops.
The 'Telemetering' of monsoon refers to its link with?
- Global weather
- Lunar phases
- Oceanic tides
- Local winds
Explanation: Monsoon teleconnections refer to the relationship between the Indian monsoon and distant phenomena like ENSO.
Which factor creates the high-pressure zone over the Indian Ocean in summer?
- Subsiding air
- Oceanic currents
- Cloud cover
- Intense heating
Explanation: Air rising over the Tibetan Plateau and Equator subsides over the Indian Ocean (Mascarene High), creating high pressure.
The Tropical Easterly Jet (TEJ) is primarily responsible for steering which of the following?
- Western disturbances
- Tropical depressions
- Dust storms
- Snowfall in Kashmir
Explanation: The TEJ steers tropical depressions into India, which play a crucial role in the distribution of monsoon rainfall.
During the summer monsoon, the ITCZ shifts to which specific region?
- Thar Desert
- Ganga plains
- Indian Ocean
- Tibetan Plateau
Explanation: The Inter-Tropical Convergence Zone (ITCZ) shifts to roughly 20°N-25°N over the Ganga plains, creating a low-pressure monsoon trough.
Mango showers are pre-monsoon rains most common in which state?
- Punjab
- West Bengal
- Karnataka
- Assam
Explanation: Mango showers occur in Karnataka and Kerala, helping in the early ripening of mangoes.
What marks the end of the hot weather season in India?
- Winter solstice
- Loo withdrawal
- Autumn equinox
- Monsoon onset
Explanation: The arrival of the Southwest monsoon brings a sudden drop in temperature and ends the summer heat.
Kalbaisakhi is a local thunderstorm associated with which state?
- Odisha
- West Bengal
- Rajasthan
- Karnataka
Explanation: Also known as 'Nor'westers', these are violent thunderstorms occurring in the evening during the hot season.
Pre-monsoon rainfall in Kerala and Karnataka that helps coffee flowers is called?
- Loo winds
- Cherry blossoms
- Mango showers
- Tea showers
Explanation: In Karnataka, pre-monsoon showers are often called 'Cherry Blossoms' or 'Coffee Showers'.
Consider the following statements:
1. El Niño usually leads to a significant increase in the intensity of the Indian monsoon.
2. A positive Indian Ocean Dipole (IOD) helps in enhancing monsoon rainfall.
3. La Niña is generally associated with stronger-than-normal monsoon rainfall.
- 1 and 3 only
- 2 and 3 only
- 1 and 2 only
- 1, 2 and 3
Explanation: Statement 1 is incorrect because El Niño typically weakens the monsoon. Statements 2 and 3 are correct: a Positive Indian Ocean Dipole (IOD) and La Niña conditions are both major factors that favor stronger-than-normal monsoon rainfall in India.
Which phenomenon involves the cooling of central and eastern Pacific waters?
- Southern Oscillation
- El Niño
- Walker Circulation
- La Niña
Explanation: La Niña is generally associated with stronger-than-normal monsoon rainfall in the Indian subcontinent.
Which theory suggests the monsoon is a large-scale land and sea breeze?
- Plate theory
- Thermal theory
- Jet stream theory
- Dynamic theory
Explanation: The classical Thermal Theory (by Halley) views the monsoon as a seasonal land and sea breeze caused by differential heating.
The Somali Jet is strongest during which months?
- June-August
- January-February
- March-April
- October-December
Explanation: The Somali Jet is a low-level jet stream that peaks during the height of the summer monsoon.