All Free General Knowledge MCQs with Answers

• A. Vertically
• B. Clockwise
• C. In no fixed direction
• D. Anticlockwise

Explanation: Coriolis deflection makes Northern Hemisphere cyclones rotate anticlockwise.

• A. Clockwise
• B. Anticlockwise
• C. In no fixed direction
• D. Vertically

Explanation: Coriolis deflection reverses south of the equator, so Southern Hemisphere cyclones rotate clockwise.

• A. A large ocean whirlpool
• B. A violently rotating column of air extending from a thunderstorm to the ground
• C. A high-altitude jet stream
• D. A gentle sea breeze

Explanation: A tornado is a narrow, violently spinning funnel of air reaching from a thunderstorm cloud to the surface.

• A. Australia
• B. Argentina
• C. The United States
• D. Bangladesh

Explanation: The United States records more tornadoes than any other country.

• A. The Great Basin
• B. The Sun Belt
• C. The Rust Belt
• D. Tornado Alley

Explanation: Tornado Alley, in the central United States, sees an exceptionally high frequency of tornadoes.

• A. The Saffir-Simpson Scale
• B. The Beaufort Scale
• C. The Richter Scale
• D. The Fujita Scale

Explanation: The Saffir-Simpson scale classifies hurricanes by sustained wind speed.

• A. The Mercalli Scale
• B. The Enhanced Fujita (EF) Scale
• C. The Saffir-Simpson Scale
• D. The Beaufort Scale

Explanation: The Enhanced Fujita scale rates tornadoes based on the damage they cause.

• A. A tidal wave near the shore
• B. A seasonal change in sea level
• C. A continuous, directed movement of seawater
• D. An underwater earthquake

Explanation: Ocean currents are steady flows of seawater moving in consistent directions across ocean basins.

• A. Volcanic eruptions and tides only
• B. The Moon's gravity alone
• C. Earthquakes and tsunamis
• D. Prevailing winds, Earth's rotation, differences in water density and the shape of coastlines

Explanation: Surface currents are driven mainly by prevailing winds, deflected by Earth's rotation, while density differences and coastlines shape…

• A. A large circular system of ocean currents
• B. A type of tidal bore
• C. A deep ocean trench
• D. A narrow strait between islands

Explanation: Gyres are vast, slowly rotating loops of currents that dominate each ocean basin.

• A. Randomly
• B. Clockwise
• C. From east to west only
• D. Anticlockwise

Explanation: Northern Hemisphere subtropical gyres rotate clockwise under the influence of the Coriolis effect.

• A. From west to east only
• B. Clockwise
• C. Anticlockwise
• D. Randomly

Explanation: Southern Hemisphere subtropical gyres rotate anticlockwise, the mirror image of northern ones.

• A. Creating desert conditions inland
• B. Cooling the coast and causing fog
• C. Having no effect on climate
• D. Warming the coast and increasing rainfall

Explanation: Warm currents raise coastal temperatures and add moisture to the air, boosting rainfall.

• A. Raising sea levels permanently
• B. Cooling the coast and often causing dry, foggy conditions
• C. Warming the coast and increasing rainfall
• D. Causing heavy monsoon rains

Explanation: Cold currents chill adjacent coasts, stabilize the air and often produce dryness and sea fog.

• A. The Labrador Current
• B. The Benguela Current
• C. The Gulf Stream
• D. The Peru Current

Explanation: The Gulf Stream runs northward along the US east coast before turning east across the Atlantic.

• A. The Canary Current
• B. The Kuroshio Current
• C. The Agulhas Current
• D. The North Atlantic Drift

Explanation: The North Atlantic Drift carries the Gulf Stream's warm water onward toward western Europe.

• A. The Kuroshio (Japan) Current
• B. The East Australian Current
• C. The Oyashio Current
• D. The Brazil Current

Explanation: The Kuroshio, or Japan Current, is the warm current flowing along Japan's eastern shore.

• A. Benguela Current
• B. Brazil Current
• C. Falkland Current
• D. Agulhas Current

Explanation: The Brazil Current is the warm current running southward along Brazil's east coast.

• A. The Leeuwin Current
• B. The Humboldt Current
• C. The East Australian Current
• D. The West Australian Current

Explanation: The East Australian Current is the warm current off Australia's eastern seaboard.

• A. Somali Current
• B. Canary Current
• C. Benguela Current
• D. Agulhas (Mozambique) Current

Explanation: The Agulhas Current flows down Africa's east coast through the Mozambique Channel as a warm current.