Question 644Steam Plants - Assistant Engineer

The correct answer is D) use of the magnetic strainers in the lube oil service pump discharge piping. Magnetic strainers in the lube oil service pump discharge piping are designed to capture and remove fine metallic particles that may originate from wear or failure of the internal parts of the lube oil service pump. These particles could otherwise contaminate and damage the bearings served by the lube oil system. The magnetic properties of the strainer effectively trap the metallic particles, preventing them from reaching and harming the bearings. The other answer options are incorrect because they do not specifically address the use of magnetic strainers to remove metallic contaminants from the lube oil system. While lube oil coolers, centrifuging, and gravity settling can help remove some solid matter, they do not specifically target the removal of fine metallic particles in the way that magnetic strainers do.