Question 589Steam Plants - Assistant Engineer

The correct answer is D) dry out the main turbines. When securing the main turbines, leaving the steam to the second stage air ejectors on for a short period of time helps to dry out the main turbines. This prevents condensation from building up inside the turbines, which could lead to corrosion and damage if left unchecked. The other answer choices are incorrect because: A) Ensuring equal cooling of the main turbine bearings is not the primary reason for leaving the steam to the air ejectors on. B) Preventing excessive condensate depression is not the main purpose in this scenario. C) Removing non-condensable vapors is not the main objective when securing the turbines.