Question 630Steam Plants - Assistant Engineer70% to pass
Labyrinth packing rings are installed on turbine diaphragms to minimize _______________.
AI Explanation
The correct answer is A) interstage steam leakage along the turbine rotor.
Labyrinth packing rings are installed on turbine diaphragms to minimize interstage steam leakage along the turbine rotor. These rings create a tight, labyrinth-like seal that prevents steam from escaping between the stationary diaphragm and the rotating turbine rotor, improving the overall efficiency of the turbine.
The other options are incorrect because they do not accurately describe the primary function of labyrinth packing rings. Option B is incorrect as the rings do not directly prevent steam from escaping to the atmosphere. Option C is incorrect as the rings do not minimize pressure buildup on both sides of the diaphragm. Option D is incorrect as the rings do not prevent air leakage from entering the turbine casing.
Related Questions
#628 When water is removed from lube oil passing through a centrifugal purifier, the water removed will _______________.#629 Which of the following statements concerning the operation of a lube oil purifier is correct? #631 Labyrinth seals used to reduce leakage around a turbine shaft are constructed of _______________.#632 When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with labyrinth packing to _______________.#633 The labyrinth seals used on rotating steam turbine shafts reduces external leakage by causing _______________.