Question 581Steam Plants - Assistant Engineer70% to pass
Excessive thrust bearing wear in a main propulsion turbine rotor should FIRST become apparent by _______________.
AI Explanation
The correct answer is D) taking rotor position indicator readings.
Excessive thrust bearing wear in a main propulsion turbine rotor will first become apparent by taking rotor position indicator readings. These readings can detect even small changes in the rotor's axial position, which is a key indicator of thrust bearing wear. This allows for early detection and proactive maintenance before more severe vibration or other issues arise.
The other options are incorrect because they represent later-stage symptoms of bearing wear, rather than the initial indications that would be detected through position indicator readings. Metal particles in the lube oil, rubbing noises, and intermittent vibration would all occur after the thrust bearing has experienced significant wear and degradation.
Related Questions
#579 In addition to causing erosion of turbine blades, slugs of water in the steam supply to a turbine-driven pump can result in _______________.#580 The main propulsion turbine can be damaged by _______________.#582 A common cause of the Babbitt linings cracking in a turbine journal bearing is from _______________.#583 An overheated bearing in the main propulsion unit is indicated by _______________.#584 The original bridge gage reading for a reduction gear bearing was measured as 0.008 inches. A year later, the bridge gage reading for the same bearing is 0.010 inches. This indicates _______________.