Question 345Steam Plants - 1st Asst/Chief70% to pass
In securing the main turbines, steam to the second stage air ejectors should be left on for a short period of time in order to _______________.
AI Explanation
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 is done to remove any accumulated moisture or condensation that may have built up in the turbines during maneuvering operations. Drying out the turbines is important to prevent potential damage or corrosion to the turbine components.
The other answer choices are incorrect because they do not specifically address the need to dry out the turbines. Option A would not be the primary reason, option B is focused on bearing cooling rather than turbine drying, and option C is about removing non-condensable vapors, which is not the key purpose in this case.
Related Questions
#343 Which of the devices listed is commonly used to compensate for the expansion and minor misalignments occurring between the main turbine rotor and the reduction gear? #344 To prevent damage to the turning gear mechanism, which of the following procedures must be carried out before the turning gear is engaged? #346 After properly lining up the main propulsion turbine for warm up, steam should first be admitted to the rotor through the _______________.#347 With vacuum up and the main propulsion turbine standing by while awaiting engine orders, it is necessary to roll the unit alternately ahead and astern every five minutes to _______________.#348 Prior to rolling the main turbines in preparation for getting underway, you should _______________.