Question 591Steam Plants - Assistant Engineer70% to pass
A pressure drop occurs across both the moving and fixed blades of a reaction turbine as a result of the _______________.
AI Explanation
The correct answer is A) moving and fixed blades being shaped to act as nozzles.
In a reaction turbine, the moving and fixed blades are designed to act as nozzles, which accelerates the flow of the working fluid (such as steam) and creates a pressure drop across both sets of blades. This pressure drop is a result of the velocity increase caused by the nozzle-like shape of the blades, which converts the thermal energy of the fluid into kinetic energy.
The other options are incorrect because: B) reversing blades do not necessarily cause a pressure drop, C) interstage diaphragms are not the primary cause of the pressure drop, and D) the conversion of thermal energy to pressure energy does not always result in a pressure drop in a reaction turbine.
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#589 In securing the main turbines, steam to the second stage air ejectors should be left on for a short period of time in order to _______________.#590 The FIRST step in breaking vacuum on a main turbine unit should be to _______________.#592 In what classification of steam turbines are the moving blades and the adjacent fixed rows of blades shaped to act as nozzles? #593 Why do double flow reaction turbines produce very little axial thrust? #594 What happens to the steam as it moves across the moving blades in a reaction turbine?