Question 583Steam Plants - Assistant Engineer70% to pass
An overheated bearing in the main propulsion unit is indicated by _______________.
AI Explanation
The correct answer is D) high temperature of the lube oil leaving the bearing.
An overheated bearing in the main propulsion unit is indicated by a high temperature of the lube oil leaving the bearing. This is because an overheated bearing generates excess heat, which is then transferred to the lube oil as it circulates through the bearing. The high temperature of the lube oil leaving the bearing is a clear sign that the bearing is overheating and may require attention or maintenance.
The other answer choices are not direct indicators of an overheated bearing. Bubbles in the sight flow glasses (A) may indicate other issues, such as air entrainment in the lube oil system. Sludge in the lube oil strainers (B) and a high level in the lube oil sump (C) are more general indicators of lube oil system problems, but do not specifically point to an overheated bearing.
Related Questions
#581 Excessive thrust bearing wear in a main propulsion turbine rotor should FIRST become apparent by _______________.#582 A common cause of the Babbitt linings cracking in a turbine journal bearing is from _______________.#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 _______________.#585 When securing a main propulsion turbine equipped with carbon packing glands, the vacuum should always be broken before securing the gland seal steam because _______________.#586 To prevent damage to the turning gear mechanism, which of the following procedures must be carried out before the turning gear is engaged?