Question 123Gas Turbine - Assistant Engineer

The correct answer is B) Reduce the engine speed. When a high vibration alarm is triggered on a vessel with propulsion gas turbines, the initial response should be to reduce the engine speed. This is because high vibration can indicate a mechanical issue or impending failure, and reducing the engine speed can help mitigate further damage and prevent a more serious incident. The other options are not the correct initial response. Switching to a secondary channel (A) or waiting for the vibration to dampen out (C) do not address the underlying issue causing the high vibration. Changing the vibration transducer (D) should only be done if the transducer itself is malfunctioning, not as the first step in response to a high vibration alarm.