Question 682Steam Plants - Assistant Engineer70% to pass
Nozzle diaphragms are installed in pressure-compounded impulse turbines to _______________.
AI Explanation
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.
Related Questions
#680 While a vessel is underway the low-pressure turbine high-speed pinion is damaged. The pinion is then removed from the gear train. Under these circumstances, the main unit is capable of which speed and direction? #681 Because of the pressure drop existing across each diaphragm, the flow of steam between the nozzle diaphragm and the rotor of the turbine is held to a minimum by _______________.#683 Lube oil cannot be efficiently filtered if it’s _______________.#684 Which of the following types of bearing lubrication schemes can carry the highest unit loading? #685 A common method of preheating main turbine lube oil prior to rolling over the main unit would be to _______________.