Question 97Steam Plants - QMED

The correct answer is B) improve purification. Preheating the lube oil before centrifuging helps improve the purification process by reducing the oil's viscosity. This allows the impurities and water to be more easily separated from the oil during the centrifugation process. Preheating the oil makes it less viscous, which facilitates the separation of contaminants and enhances the overall purification efficiency. The other options are incorrect because they do not directly address the purpose of preheating the lube oil before centrifuging. Option A, boiling off water, is not the primary goal, as the centrifuge itself is designed to remove water and other impurities. Option C, reducing friction of the rotating components, is also not the main reason for preheating the oil. Option D, preventing corrosion, is not the direct purpose of preheating the oil before centrifuging.