An aeroplane is descending at a constant Mach number from FL 350. What is the effect on true airspeed ?

Question

Question ATPL - Airline Transport Pilot license - Principles of Flight

QuizVDS · Accepted Answer

It increases as temperature increases

QuizVDS · Answer

It decreases as pressure increases

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It remains constant

QuizVDS · Answer

It decreases as altitude decreases

Id 189 - ATPL - An aeroplane is descending at a constant Mach number from FL 350. What is the effect on true airspeed ?