A gas turbine engine in which exhaust gas heat energy is added to the air charge between the compressor and combustion chamber is classified as which of the following?

Correct Answer: Option D — Regenerative cycle engine.

Regenerative cycle engines improve thermal efficiency by capturing exhaust heat that would otherwise be lost to the atmosphere. By routing this energy back into the air charge between the compressor discharge and the combustion chamber, the engine requires less fuel to maintain the desired turbine inlet temperature.