Practice question

Where is Clear Air Turbulence (CAT) most frequently encountered in high-altitude upper airspace?

  1. Near the core and boundaries of jet streams near the tropopause
  2. Inside low-altitude stratus cloud layers over tropical oceans
  3. Directly over desert surface layers during midday solar heating
  4. Within steady laminar airflows below 5,000 ft AMSL

Answer: A — Near the core and boundaries of jet streams near the tropopause

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