In a single shaft, cold-end drive gas turbine, the power output speed has what relationship to the speed of the compressor?

Correct Answer: Option B — It is the same or in a direct relationship through reduction gears.

In a single-shaft gas turbine, the compressor and power output shaft are mechanically locked together. Consequently, the output speed is directly proportional to the compressor speed, governed by the fixed ratio of the reduction gearing. Any change in compressor RPM results in a corresponding change in output speed.