Question 533Steam Plants - Assistant Engineer70% to pass
The correct radial clearances between the rotor and the casing in a propulsion turbine are maintained by the turbine _______________.
AI Explanation
The correct answer is C) journal bearings.
The radial clearances between the rotor and the casing in a propulsion turbine are maintained by the turbine's journal bearings. Journal bearings support the rotating shaft and allow it to spin freely while preventing excessive radial movement. This controlled radial clearance is crucial for the proper operation and efficiency of the turbine.
The other options are incorrect because interstage packing (A) is used to prevent leakage between turbine stages, thrust bearings (B) are responsible for supporting the axial loads, and diaphragms (D) are stationary components that guide the flow of steam through the turbine stages.
Related Questions
#531 On a main propulsion turbine bearing, the readings obtained with a bridge gage represent the _______________.#532 The adjustable spherically seated self-aligning bearing housings used in main turbines are provided with oil deflector rings. The function of these rings is to _______________.#534 Main steam turbine bearings are lined with _______________.#535 Journal bearings used with modern turbine rotors are manufactured in two halves in order to _______________.#536 For a large main propulsion turbine, the most commonly used turbine thrust bearing is the _______________.