Question 517Steam Plants - Assistant Engineer

The correct answer is D) rotating the same direction as the low-speed pinion on the low-pressure side. When steam is admitted to the astern element of a turbine gear set with a right-hand turning propeller, the high-speed gear on the high-pressure side will rotate in the same direction as the low-speed pinion on the low-pressure side. This is because the astern turbine element is designed to provide thrust in the opposite direction, causing the high-speed gear to rotate in the opposite direction to the forward rotation of the propeller. The other options are incorrect because A) and B) describe the rotation in the opposite direction, while C) describes the rotation in the same direction as the low-pressure side, which is not the case when the astern element is in use.