Question 511Steam Plants - Assistant Engineer

The correct answer is B) first reduction gear. The first reduction gear is responsible for the initial reduction of the engine's rotational speed, which is necessary to match the propeller's optimal operating speed. This component is typically located within the transmission or reduction gear assembly, and its function is to provide the appropriate gearing ratio to efficiently transfer power from the engine to the propeller. The other answer choices are incorrect because: A) The first reduction pinion is a smaller gear that meshes with the first reduction gear. C) The second reduction pinion is a smaller gear that meshes with the second reduction gear. D) The second reduction gear is responsible for a further reduction in rotational speed, after the initial reduction by the first reduction gear.