Practice question

What does the Q-code 'QNH' represent in altimetry?

  1. Altimeter sub-scale setting to indicate altitude above mean sea level (MSL) when at the aerodrome
  2. Altimeter setting to indicate height above aerodrome elevation (QFE)
  3. Standard pressure setting of 1013.25 hPa
  4. Q-code for surface temperature

Answer: A — Altimeter sub-scale setting to indicate altitude above mean sea level (MSL) when at the aerodrome

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

Practice more: SACAA ATC Licence Practice Questions - SACAA Air Traffic Controller Licence Theoretical Knowledge Examination Exam →