Question 642Steam Plants - Assistant Engineer

The correct answer is B) reduction gears. Magnets are installed in the main propulsion turbine lube oil strainers to attract metal particles released through wearing of the reduction gears. The reduction gears are responsible for transmitting power from the turbine to the propeller, and the metal particles released through the wearing of the reduction gears can be effectively captured by the magnets in the lube oil strainers. The other options are incorrect because: A) Babbitt bearings are not the primary source of metal particles in the turbine lube oil, C) turbine blades are made of specialized materials that are not prone to significant wear, and D) turbine labyrinths are designed to minimize wear and do not typically generate metal particles that need to be captured by the oil strainers.