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15 - ATPL - An aeroplane is in steady cruise at flight level 270. The auto-throttle maintains a constant calibrated airspeed. If the static air temperature decreases, the Mach number:

Question 15 - Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license

Remains constant.
Increases if the outside temperature is higher than the standard temperature, decreases if lower.
Decreases.
Increases.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license