Question 396General Subjects - Assistant Engineer

The correct answer is B) Main circulating system. The main circulating system aboard a ship typically uses a propeller-type pump to circulate the water through the main engine's cooling system. Propeller-type pumps are well-suited for this application because they can efficiently move large volumes of water at relatively low pressures, which is the primary requirement for a main circulating system. The other options are not as likely to use a propeller-type pump. The steering gear system may use a positive displacement pump, the fuel oil service booster system may use a centrifugal pump, and the fluid power transmission system may use a gear or vane-type pump, depending on the specific application.