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Q105 (CDS-II/2010) Geography › World Physical Geography › Atmospheric pressure winds Answer Verified

. Which one of the following is the correct sequence of increasing velocity of wind ?

Result
Your answer: —  Â·  Correct: A
Explanation

The correct sequence of increasing wind velocity is based on the Beaufort Scale, an empirical measure that relates wind speed to observed conditions. According to the scale, a 'Light breeze' (Force 2) has speeds of approximately 4–7 mph (6–11 km/h) [t1][t6]. This is followed by a 'Fresh breeze' (Force 5), which ranges from 19–24 mph (29–38 km/h) [t1][t7]. A 'Gale' (Force 8) represents higher velocities of 34–40 knots (approx. 39–46 mph) where moderately high waves and breaking crests occur [t7]. Finally, a 'Hurricane' (Force 12) represents the highest category with speeds exceeding 74 mph (119 km/h or 120+ km/h), causing catastrophic damage [c3][t3]. Therefore, the sequence Light breeze - Fresh breeze - Gale - Hurricane correctly reflects the progression from lower to higher wind velocities.

Sources

  1. [1] https://www.ndstudies.gov/energy/level2/module-4-wind-hydropower-solar/wind-power
  2. [2] https://education.nationalgeographic.org/resource/beaufort-scale/
  3. [3] https://forecast.weather.gov/glossary.php?word=SCA
  4. [4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 26: Tropical Cyclones > Saffir-Simpson Hurricane Wind Scale > p. 372
  5. [5] https://www.noaa.gov/jetstream/ocean/waves/jetstream-max-wind-and-sea-scales
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