What must you do after rolling the turbine to 200-300 rpm?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

After rolling the turbine to 200-300 RPM, the appropriate action is to trip the turbine. Tripping the turbine is a safety procedure that involves shutting down the turbine in a controlled manner. This is typically done to ensure that all systems are functioning correctly and safely before the turbine goes online or to verify that safety mechanisms are in place.

During the roll-up process, the turbine reaches a certain speed to ensure that all rotating components are properly lubricated and that the system is functioning smoothly. By tripping the turbine at this point, operators can check for any issues without putting the turbine into full operation. This step helps identify potential problems early on and ensures safe operational practices.

The other options involve actions that would either prematurely start the turbine or do not address safety checks and procedures appropriately at this particular speed. Opening the steam flow valve or closing the turbine casing drains would typically be steps taken when preparing for startup once all conditions are confirmed to be safe. Resetting the driveshaft is not a necessary step in the rolling procedure at this speed, as this typically pertains to issues encountered during operation or maintenance.

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