Question 551Steam Plants - Assistant Engineer70% to pass
The gravity tank in a gravity lube oil system serves to _______________.
AI Explanation
The correct answer is B) maintain oil supply for several minutes to bearings should the lube oil service pump fail.
The gravity tank in a gravity lube oil system serves to provide a temporary supply of lube oil to the bearings in the event that the main lube oil service pump fails. This ensures that the bearings continue to receive lubrication for a limited time, preventing damage until the main pump can be restored or an auxiliary pump can be engaged.
The other options are incorrect because: A) the purifier, not the gravity tank, is responsible for settling the lube oil; C) the gravity tank does not store heated oil; and D) the gravity tank's purpose is to provide a positive suction head, not to supply the service pump directly.
Related Questions
#549 Which of the devices listed is commonly used to compensate for the expansion and minor misalignments occurring between the main turbine rotor and the reduction gear? #550 The part shown in the illustration would be located between which of the following components of a modern geared turbine main propulsion unit? Illustration SE-0001 #552 Which of the following conditions is indicated by oil flowing through a lube oil gravity tank overflow sight glass? #553 Why is superheated steam used in the main propulsion turbines instead of saturated steam? #554 As steam first enters the main propulsion turbine, which of the following energy conversions takes place?