HorthooZ – Kerala GK, PSC Questions & Onam Quiz

Q1 Multiple Choice Question

Known as 'Hurricanes' in the North Atlantic and Caribbean, 'Typhoons' in the Northwest Pacific, and 'Cyclones' in the Indian Ocean, these intense violent storms are powered by:

A Nuclear fusion reactions in the stratosphere B Direct gravitational tidal pulls from the Moon C Geothermal volcanic magma eruptions beneath ocean trenches D Latent heat released from condensing warm ocean waters (>26.5°C)

Q2 Multiple Choice Question

In ocean hydrodynamics, a tsunami behaves as a 'shallow-water wave' across the deep ocean because its wavelength is vastly greater than:

A The ocean water depth, allowing it to travel at hundreds of kilometers per hour with minimal energy loss B The daily orbital distance of the Moon around Earth C The total diameter of planet Earth's equatorial circumference D The absolute height of Mount Everest above sea level

Q3 Multiple Choice Question

What is the outermost upper layer of Earth's atmosphere that gradually merges into the vacuum of interplanetary space, where satellites orbit?

A Stratosphere B Exosphere C Troposphere D Mesosphere

Q4 Multiple Choice Question

Large bodies of air with relatively uniform temperature and moisture characteristics across horizontal hundreds of kilometers are known as:

A Air Masses B Coriolis deflection cells C Thermocline layers D Oceanic Gyres

Q5 Multiple Choice Question

Rainfall caused when moisture-laden winds are forced to rise over a mountain barrier, cooling adiabatically and precipitating on the windward slope, is called:

A Cyclonic / Frontal Rainfall B Convectional Rainfall C Monsoonal depression rain D Orographic Rainfall (Relief Rainfall)

Q6 Multiple Choice Question

A 'Geostrophic Wind' blows parallel to straight isobar lines in the upper troposphere because of an exact balance achieved between:

A The Pressure Gradient Force (PGF) and the Coriolis Force B Frictional surface drag and direct solar heating C Atmospheric ozone absorption and ultraviolet scattering D Centrifugal tidal gravity and solar magnetic radiation

Q7 Multiple Choice Question

What is the term for the ratio of the actual amount of water vapor present in a given volume of air to the maximum amount that air can hold at that specific temperature, expressed as a percentage?

A Absolute Humidity B Dew Point C Specific Humidity D Relative Humidity

Q8 Multiple Choice Question

The Dry Adiabatic Lapse Rate (DALR) of unsaturated rising air parcels in the lower troposphere is approximately:

A 25.0°C per 1,000 meters of altitude gain B 9.8°C per 1,000 meters (1 km) of altitude gain C 1.5°C per 1,000 meters of altitude gain D Zero degrees with constant temperature throughout

Q9 Multiple Choice Question

How often do Spring Tides (highest high tides) and Neap Tides (lowest high tides) typically occur during the lunar month?

A Twice a month (Spring tides at new/full moon, Neap tides at quarter moons) B Once every six months C Once a year D Every single day without variation

Q10 Multiple Choice Question

Catastrophic ocean seismic sea waves known as Tsunamis are typically triggered by which underwater geological event?

A Underwater earthquakes along fault lines / subduction zones B Strong lunar gravity eclipses C Massive meteorite impacts in deserts D Severe atmospheric wind cyclones

Q11 Multiple Choice Question

Large-scale planetary waves meandering across the middle and upper troposphere in long patterns (Rossby waves) are driven primarily by:

A Daily ocean tidal friction against continental shelves B The conservation of potential vorticity as air masses move across varying latitudes and topographical barriers C Volcanic dust storms erupting across desert interiors D Direct geothermal heat venting from deep mantle plumes

Q12 Multiple Choice Question

In equatorial Pacific ocean-atmosphere interactions, the 'Walker Circulation' during normal non-El Niño years is characterized by:

A Westerly gales blowing warm water permanently toward the coast of Chile B Easterly trade winds blowing warm surface water toward the western Pacific, causing upwelling of cold nutrient-rich water off Peru C Total absence of atmospheric pressure gradients across the equator D Complete permanent freezing of the entire Pacific ocean surface

Q13 Multiple Choice Question

Heavy afternoon downpours accompanied by thunder and lightning caused by intense surface solar heating and vertical air convection (common near the Equator) are termed:

A Convectional Rainfall B Frontal Cyclonic Rainfall C Orographic Rainfall D Orographic snow flurry

Q14 Multiple Choice Question

Which atmospheric layer contains electrically charged ions that reflect radio waves back to Earth, enabling long-distance wireless communication?

A Thermosphere / Ionosphere B Stratosphere C Troposphere D Mesosphere

Q15 Multiple Choice Question

Large-scale circular systems of ocean currents formed by global wind patterns and Earth's rotation in major ocean basins are called:

A Abyssal trenches B Tidal bores C Thermohaline conveyor cells D Ocean Gyres

Q16 Multiple Choice Question

In advanced atmospheric thermodynamics, a 'Temperature Inversion'—where air temperature increases with altitude rather than decreasing—commonly occurs during:

A Long winter nights with clear skies, calm winds, and rapid terrestrial radiation cooling valley floors B Intense midday summer tropical monsoonal cloudbursts C Violent volcanic stratospheric ash eruptions D Active equatorial low-pressure cyclone formation

Q17 Multiple Choice Question

What is the critical temperature at which air becomes 100% saturated with water vapor and condensation begins to form?

A Lapse Rate Threshold B Absolute Zero C Boiling Point D Dew Point

Q18 Multiple Choice Question

The lowest part of the troposphere directly influenced by frictional drag, heat transfer, and moisture exchange with Earth's surface is known as:

A The stratospheric ozone shielding layer B The mesospheric noctilucent cloud layer C The Planetary Boundary Layer (PBL) or Atmospheric Boundary Layer D The exospheric plasma ionosphere

Q19 Multiple Choice Question

Which atmospheric layer located above the troposphere contains the protective ozone layer and is ideal for jet aircraft flight due to absence of weather disturbances?

A Troposphere B Exosphere C Mesosphere D Stratosphere

Q20 Multiple Choice Question

Reliable, steady planetary winds blowing continuously from the Subtropical High-Pressure Belts toward the Equatorial Low-Pressure Belt are known as:

A Westerlies B Trade Winds C Polar Easterlies D Monsoon gales

Atmosphere & Hydrosphere