Question 95Motor Plants - QMED

The correct answer is B) Reduction gears can be used for propeller thrust reversal and reduction gears can be used for multiple prime mover inputs. Explanation: 1. Reduction gears serve multiple purposes beyond just speed reduction for efficient propeller operation. One key function is to enable propeller thrust reversal, which allows the vessel to change direction and slow down. 2. Additionally, reduction gears can be used to connect multiple prime mover inputs (such as engines or turbines) to a single propeller shaft, providing more flexibility and redundancy in the propulsion system. 3. The other options are incorrect as they do not accurately represent the additional functions of reduction gears, such as thrust reversal and connecting multiple prime movers. 4. This knowledge is important for understanding the capabilities and versatility of marine propulsion systems, which is relevant for the US Coast Guard Captain's License Examinations.