All Free General Knowledge MCQs with Answers
Every General Knowledge question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
7,202 questions · page 333 of 361
- A. The millibar (hectopascal)
- B. The atmosphere
- C. The torr
- D. The pascal only
Explanation: Weather maps express pressure in millibars, now called hectopascals.
Correct answer: The millibar (hectopascal)- A. About 980 millibars
- B. About 1013.25 millibars
- C. About 1000 millibars
- D. About 1025 millibars
Explanation: Standard sea-level pressure is about 1013.25 hPa.
Correct answer: About 1013.25 millibars- A. Gravitational force
- B. Centrifugal force
- C. The Coriolis force
- D. Frictional force
Explanation: Earth's rotation produces the Coriolis effect, deflecting moving air right in the north and left in the south.
Correct answer: The Coriolis force- A. Boyle's Law
- B. Kepler's Law
- C. Newton's Law
- D. Ferrel's Law
Explanation: Ferrel's Law describes how the Coriolis effect deflects winds.
Correct answer: Ferrel's Law- A. The Equatorial Low (Doldrums)
- B. The Subtropical High
- C. The Horse Latitudes
- D. The Polar High
Explanation: Intense heating at the equator creates a belt of rising air and low pressure.
Correct answer: The Equatorial Low (Doldrums)- A. The Horse Latitudes
- B. The Doldrums
- C. The Roaring Forties
- D. The Polar Front
Explanation: The Doldrums are the calm equatorial belt where trade winds converge.
Correct answer: The Doldrums- A. The Subpolar Lows
- B. The Polar Highs
- C. The Subtropical High-Pressure Belts (Horse Latitudes)
- D. The Equatorial Lows
Explanation: Descending air creates high-pressure belts around 30° latitude in both hemispheres.
Correct answer: The Subtropical High-Pressure Belts (Horse Latitudes)- A. Because of their shape on maps
- B. Because horses were raced there
- C. Because wild horses live there
- D. Because sailing ships were often becalmed there and reportedly threw horses overboard
Explanation: Legend says becalmed ships lightened their load by throwing horses overboard in these calm zones.
Correct answer: Because sailing ships were often becalmed there and reportedly threw horses overboard- A. The Subpolar Low-Pressure Belts
- B. The Subtropical Highs
- C. The Polar Highs
- D. The Equatorial Low
Explanation: Around 60° latitude, converging air masses create belts of low pressure.
Correct answer: The Subpolar Low-Pressure Belts- A. No pressure system
- B. Polar high pressure
- C. Equatorial pressure
- D. Polar low pressure
Explanation: Cold, dense air sinks over the poles, creating high-pressure zones.
Correct answer: Polar high pressure- A. A straight-line wind
- B. A high-pressure system with winds spiralling outward
- C. A low-pressure system with winds spiralling inward
- D. A calm zone with no wind
Explanation: Cyclones are low-pressure centres with air converging and spiralling inward.
Correct answer: A low-pressure system with winds spiralling inward6652. What is an anticyclone?
- A. A low-pressure system with winds spiralling inward
- B. A tropical storm
- C. A tornado
- D. A high-pressure system with winds spiralling outward
Explanation: Anticyclones are high-pressure systems with diverging winds and usually settled weather.
Correct answer: A high-pressure system with winds spiralling outward- A. The Trade Winds
- B. The Polar Easterlies
- C. The Monsoons
- D. The Westerlies
Explanation: The Trade Winds blow from the subtropical highs toward the equatorial low.
Correct answer: The Trade Winds- A. From the southeast
- B. From the northeast
- C. From the southwest
- D. From the northwest
Explanation: The Coriolis effect turns the northward-flowing Trade Winds to blow from the northeast.
Correct answer: From the northeast- A. From the northeast
- B. From the southwest
- C. From the southeast
- D. From the northwest
Explanation: In the Southern Hemisphere the Trade Winds blow from the southeast toward the equator.
Correct answer: From the southeast- A. The Polar Easterlies
- B. The Doldrums
- C. The Trade Winds
- D. The Westerlies
Explanation: The Westerlies blow from the subtropical highs toward the subpolar lows.
Correct answer: The Westerlies- A. From the southwest
- B. From the northwest
- C. From the northeast
- D. From the southeast
Explanation: Northern Hemisphere Westerlies blow from the southwest toward the northeast.
Correct answer: From the southwest- A. From the southwest
- B. From the northwest
- C. From the northeast
- D. From the southeast
Explanation: Southern Hemisphere Westerlies blow from the northwest toward the southeast.
Correct answer: From the northwest- A. The Screaming Sixties
- B. The Howling Seventies
- C. The Roaring Forties
- D. The Furious Fifties
Explanation: Unobstructed by land, the Southern Ocean westerlies at 40°S are famously powerful.
Correct answer: The Roaring Forties- A. The Wild Sixties
- B. The Roaring Forties
- C. The Screaming Sixties
- D. The Furious Fifties
Explanation: The westerlies intensify with latitude: Roaring Forties, Furious Fifties, Screaming Sixties.
Correct answer: The Furious Fifties