Question 98Motor Plants - QMED

The correct answer is C) Single reduction, double input. This type of reduction gear is commonly used with twin medium-speed propulsion diesel engines driving a single shaft because it allows the power from the two engines to be combined and transmitted to the single propeller shaft. The double input configuration takes the power from the two engines and reduces the speed through a single reduction stage before delivering it to the propeller. This is an efficient and reliable arrangement for this type of propulsion system. The other options would not be as suitable - a single reduction, single input gear would only be able to accept power from one engine, while a double reduction, double input, articulated gear would be overly complex and expensive for this application.