Practice question

What is the 'Transition Altitude' (TA) versus the 'Transition Level' (TRL), and what is the 'Transition Layer' in air traffic control operations?

  1. Transition Altitude is the altitude at or below which vertical position is expressed as Altitude (QNH); Transition Level is the lowest flight level available above the TA expressed as Flight Level (QNE 1013.25 hPa); the airspace between TA and TRL is the Transition Layer, where level cruise flight is prohibited.
  2. Transition Altitude is the runway elevation; Transition Level is the top of the stratosphere.
  3. Transition Layer is the airspace where air traffic control is turned off.
  4. Transition Level is always lower than Transition Altitude.

Answer: A — Transition Altitude is the altitude at or below which vertical position is expressed as Altitude (QNH); Transition Level is the lowest flight level available above the TA expressed as Flight Level (QNE 1013.25 hPa); the airspace between TA and TRL is the Transition Layer, where level cruise flight is prohibited.

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: DGAC Bolivia Air Traffic Controller (CTA) Practice Questions - DGAC Bolivia Air Traffic Controller License Theoretical Examination (Controlador de Tránsito Aéreo - CTA) Exam →