Question 153Steam Plants - QMED

The correct answer is B) lube oil coolers. In a pressure type main propulsion turbine lubrication system, the lube oil service pumps normally take suction from the main sump and discharge directly to the lube oil coolers. This arrangement allows the lube oil to be cooled before it is distributed to the various lubrication points, such as the main thrust bearing, within the system. The lube oil coolers are a critical component in maintaining the proper temperature of the lubricating oil, which is essential for the proper functioning and longevity of the turbine machinery. The other answer choices are incorrect because: A) the main thrust bearing is a lubrication point, not the destination of the lube oil from the service pumps; C) the gravity feed tank is not the typical discharge point for the lube oil service pumps; and D) the lube oil header is a distribution point, not the final destination of the lube oil from the service pumps.