CAA NZ CPL Aircraft Technical Knowledge Practice Questions - CAA NZ CPL Theory - General Aircraft Technical Knowledge (New Zealand) Exam

How is 'critical altitude' defined for a turbocharged piston aircraft engine?

The maximum altitude at which a turbocharged engine can produce its maximum rated sea-level manifold pressure at full throttle The altitude at which the wastegate opens completely to prevent cylinder overpressurisation The minimum altitude required for the turbocharger intercooler to operate efficiently The altitude at which the engine transitions from rich to lean mixture auto-metering

Correct Answer:

The maximum altitude at which a turbocharged engine can produce its maximum rated sea-level manifold pressure at full throttle

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