Question 347Steam Plants - 1st Asst/Chief70% to pass
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 _______________.
AI Explanation
The correct answer is A) reduce the possibility of warping the turbine rotors.
When a turbine is standing by, it is important to periodically roll the unit alternately ahead and astern in order to prevent the rotors from becoming warped or misaligned due to uneven heating or cooling. Constant rolling helps distribute the heat evenly throughout the turbine, maintaining the proper shape and alignment of the rotors. The other options, while relevant to turbine operation, do not directly address the need to prevent warping of the rotors during standby periods.
Related Questions
#345 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 _______________.#346 After properly lining up the main propulsion turbine for warm up, steam should first be admitted to the rotor through the _______________.#348 Prior to rolling the main turbines in preparation for getting underway, you should _______________.#349 Before placing the jacking gear in operation on a main turbine unit, you must always insure that _______________.#350 To stop the rotor of a main turbine while underway at sea you should _______________.