A reciprocating aircraft engine having rated takeoff power that is producible from sea level to an established higher altitude is called:

• A. Altitude Engine
• B. Turbocharged engine
• C. High-altitude engine
• D. Supercharged engine

Answer: (A)

This is about how piston engine power is rated across elevations. Some engines are designed so their rated takeoff power can be produced from sea level up to a higher, specified altitude. That capability is described with the term altitude engine. It means the engine’s takeoff power rating is valid over a selected range of altitude, not just at sea level.

Turbocharged or supercharged engines are both types of forced induction used to boost power at altitude, but they describe how the boost is achieved, not the specific certification that the takeoff power remains constant up to a certain altitude. High-altitude engine isn’t a standard designation in this context. So the term that matches the description precisely is altitude engine.