Question 660Steam Plants - Assistant Engineer70% to pass
Which immediate action should you take when the temperature of one line shaft bearing increases above its normal operating temperature?
AI Explanation
The correct answer is A) Check the bearing for proper lubrication.
When the temperature of a line shaft bearing increases above its normal operating temperature, the immediate action should be to check the bearing for proper lubrication. This is because inadequate or improper lubrication is one of the most common causes of bearing overheating. Checking the lubrication level and condition can help identify and address the root cause of the temperature increase before it leads to more serious issues.
The other options, while potentially necessary, are not the immediate actions that should be taken. Stopping the unit and replacing the bearing (B) or stopping the unit and inspecting the bearing (D) would be premature without first checking the lubrication. Checking the water circulation to the lube oil coolers (C) may be necessary if the lubrication check indicates a problem with the cooling system, but this should not be the first step.
Related Questions
#658 Which of the following operational practices is helpful in avoiding the accumulation of condensate in the main reduction gear casing? #659 Which of the listed operational checks should be made "continuously" on the main propulsion reduction gears? #661 The most practical method of determining the condition of a shaft bearing while the shaft is in operation is to _______________.#662 Which of the following would cause the dowel or locking lip of a split-type, precision insert, main bearing to shear and allow the bearing to rotate with the journal? #663 If a line shaft bearing begins to overheat, the shaft speed should be reduced. If overheating persists, you should then _______________.