Question 158Steam Plants - QMED
70% to passThe jacking gear must be engaged as quickly as possible when securing the main turbines in order to _______________.
Aprevent uneven cooling of the turbine rotors
Bmaintain a constant supply of lube oil to the main unit
Cprevent the stern tube bearing from overheating
Dpermit rapid cooling of the reduction gears
AI Explanation
The correct answer is A) prevent uneven cooling of the turbine rotors. When securing the main turbines, the jacking gear must be engaged as quickly as possible to prevent uneven cooling of the turbine rotors. This is because rapid cooling of the turbine rotors can lead to thermal distortion and potential damage to the turbine components. Engaging the jacking gear ensures that the rotors cool evenly and prevents any undue stresses on the turbine. The other answer choices are incorrect because they do not directly address the primary purpose of engaging the jacking gear, which is to ensure even cooling of the turbine rotors.
Related Questions
Q@q.QuestionNumber:Water boxes on main condensers are vented to _______________. Q@q.QuestionNumber:A main condenser utilizing a scoop for the circulation of seawater must be const... Q@q.QuestionNumber:The upper section of the feed water heater indicated by "G" in the illustration ... Q@q.QuestionNumber:According to the illustrated steam and HP bleed system diagram, which steam pres... Q@q.QuestionNumber:Fuel piping should be regularly inspected for leaks. What leak location would be...
Ready to test your knowledge?
Take a Steam Plants - QMED Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App