During a flight at FL 100 from Marseille (QNH 1012 hPa) to Palma de Mallorca (QNH 1015 hPa), an aircraft remains at a constant true altitude. The reason for this is that:

Question

Question ATPL - Airline Transport Pilot license - Meteorology

QuizVDS · Accepted Answer

The air at Marseille is warmer than that at Palma de Mallorca.

QuizVDS · Answer

The air at Marseille is colder than that at Palma de Mallorca.

QuizVDS · Answer

The altimeters are erroneous, and need to be tested.

QuizVDS · Answer

One of the two QNH values may be incorrect.

Id 32 - ATPL - During a flight at FL 100 from Marseille (QNH 1012 hPa) to Palma de Mallorca (QNH 1015 hPa), an aircraft remains at a constant true altitude. The reason for this is that: