Which of the following statements represents the significance of the differential pressure existing between the nozzle block and steam chest of a turbo generator equipped with a lifting beam mechanism?

Correct Answer: Option C — The pressure differential assists in seating the valves when the lifting beam is lowered.

Unbalanced steam pressure acting across the bottom of the poppet valves creates an upward force. When the lifting beam lowers, this differential steam pressure forces the valves downward onto their respective seats, ensuring positive closure and preventing steam leakage into inactive nozzles.