Question 576Steam Plants - Assistant Engineer

The correct answer is A) tripping the throttle trip by hand. The turbine of a turbo-electric drive should be secured by tripping the throttle trip by hand. This is the proper procedure to safely shut down the turbine in an emergency situation. Tripping the throttle trip by hand will immediately disconnect the turbine from the steam supply, allowing it to rapidly decelerate and come to a stop. The other options are incorrect because: B) dynamic braking of the generator would not directly affect the turbine, C) closing the main steam stops would not immediately stop the turbine, and D) closing the throttle by hand would be a slower process compared to tripping the throttle trip.