Question 682Steam Plants - Assistant Engineer

The correct answer is D) hold the nozzles of the stage and admit steam to moving blades. Nozzle diaphragms in pressure-compounded impulse turbines are designed to hold the nozzles of the turbine stage in place and direct the flow of steam from the nozzles onto the moving blades. This is necessary to maximize the efficiency of the turbine by ensuring the steam is properly channeled and directed onto the blades, which drives the rotation of the turbine. The other answer choices are incorrect because they do not accurately describe the primary function of the nozzle diaphragm in this type of turbine. Eliminating blade and nozzle losses (A), supporting shrouding (B), and supporting moving blades (C) are not the main purposes of the nozzle diaphragm in a pressure-compounded impulse turbine.