Question 672Steam Plants - Assistant Engineer70% to pass
Which of the following statements represents the function the nozzle assembly performs in an impulse turbine?
AI Explanation
The correct answer is B) Converts the steam's thermal energy into kinetic energy by increasing its velocity and directing it against the rotor blades.
In an impulse turbine, the nozzle assembly is responsible for converting the thermal energy of the steam into kinetic energy. By passing the steam through a converging-diverging nozzle, the nozzle increases the velocity of the steam, which then impacts the turbine blades and causes them to rotate. This conversion of thermal energy to kinetic energy is the primary function of the nozzle assembly in an impulse turbine.
The other answer choices are incorrect because they do not accurately describe the role of the nozzle assembly in an impulse turbine. Option A describes the function of a reaction turbine, not an impulse turbine. Option C describes the function of a boiler, not a turbine. Option D is not a correct description of the nozzle assembly's function.
Related Questions
#670 Which of the devices listed is found on an LP main propulsion steam turbine casing? #671 Large temperature and pressure drops which occur in the first stage of a combination impulse and reaction turbine are caused by steam passing through _______________.#673 The labyrinth packing ring in an interstage diaphragm of an impulse turbine is prevented from rotating by _______________.#674 Steam passing through a multi-stage impulse turbine does not impart any appreciable axial thrust to the rotor. This is primarily due to the _______________.#675 In an impulse turbine, the fixed blades function to _______________.