Question 159Steam Plants - QMED

The correct answer is C) The jacking gear splined clutch is associated with the high pressure turbine first reduction pinion. The jacking gear is used to manually rotate the turbine shaft when the main propulsion steam turbines are not operating. This allows the shaft to be rotated slowly for maintenance and inspection purposes. The jacking gear splined clutch connects the jacking gear to the high pressure turbine's first reduction pinion, which is the first stage of the turbine's reduction gearing system. This allows the jacking gear to engage and turn the turbine shaft when needed. The other options are incorrect because the jacking gear clutch is not associated with the low pressure turbine's reduction gearing, nor the high pressure turbine's second reduction pinion.