Question 126Steam Plants - QMED

The correct answer is D) lube oil cooler. During high-speed operation of the main turbine propulsion unit, the heat absorbed by the lubricating oil is removed by the lube oil cooler. The lube oil cooler is a heat exchanger that transfers the heat from the lubricating oil to a cooling medium, usually seawater or freshwater, effectively dissipating the heat generated by the high-speed operation of the main turbine. The other options are incorrect because: A) The distillate cooler is used to cool the distillate (condensed steam) from the turbine, not the lubricating oil. B) The lube oil purifier is used to remove contaminants from the lubricating oil, not to cool it. C) The sump vents are used to release excess pressure, not to cool the lubricating oil.