20 / 20
An aircraft is flying from Bratislava, Slovakia to Hamburg, Germany and there is a warm front lying across the route. Where around the front is freezing rain most likely to be encountered?
  • A
    Below the front, in the cold sector, below the 0°C isotherm.
  • B
    Below the front, in the cold sector, above the 0°C isotherm.
  • C
    Above the front, in the warm sector, above the 0°C isotherm.
  • D
    Above the front, in the cold sector, below the 0°C isotherm.

Refer to figure.
Freezing rain, or rain ice, is a very dangerous phenomenon which occurs most often underneath a warm front (within the cold sector), where relatively warm rain is falling from the warm air above, and hitting the airframe below (which is below freezing temperature). This rain then can instantly freeze onto the airframe, causing a fast build up of ice onto the aircraft surfaces. The annex above shows the location of the rain ice triangle, which is the region of danger for this phenomenon.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • United Kingdom