The maximum mass to which an aeroplane may be loaded, prior to engine start, is…
Looking at the answers:
'Maximum certificated taxi (ramp) mass' --> CORRECT. This is the structural limit on the ramp and includes the total block fuel. This is the heaviest an aircraft can ever be.
'Maximum regulated taxi (ramp) mass' --> INCORRECT. This mass DOES NOT exist. Regulated masses only apply to Take-off and Landing, as here we must compare the structural limitation to the performance limit. There is no performance consideration when parked on stand or taxiing.
'Maximum regulated take-off mass' --> INCORRECT. Not the absolute heaviest the aircraft can be, as start & taxi fuel is already burnt.
'Maximum certificated take-off mass' --> INCORRECT. Again, not the absolute heaviest the aircraft can be, as start & taxi fuel is already burnt.
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