Question 526Steam Plants - Assistant Engineer70% to pass
Which of the following statements is true concerning the lube oil system shown in the illustration? Illustration SE-0011
AI Explanation
The correct answer is D) The drains from lube oil coolers can be directed back to the main sump, the sludge tank or the lube oil purifier.
This is correct because the lube oil system illustration shows multiple drain lines from the lube oil coolers, allowing the oil to be directed to different parts of the system, such as the main sump, sludge tank, or the lube oil purifier. This provides flexibility in managing the lube oil and ensuring proper circulation and purification.
The other options are incorrect because: A) The gravity tank does not directly supply oil to the turbines and gears, but rather provides a backup supply; B) The gravity tank overflow line does not lead directly to the sludge tank; and C) The three-way temperature control valve is used to maintain the desired oil temperature, not to bypass the lube oil cooler.
Related Questions
#524 In steam turbine and reduction gear units, lube oil coolers installed in the lube oil system are located between the _______________.#525 In a gravity lube oil system, a sight glass is installed in a line near the operating platform. This line connects the _______________.#527 After starting the main lube oil pump in a gravity-type lube oil system, you should verify that the gravity tanks are full by _______________.#528 When a turbine rotor is not rotating during maneuvering, the heat tends to be concentrated at the _______________.#529 With vacuum up and the main propulsion turbine standing by while awaiting engine orders, it is necessary to roll the unit alternately ahead and astern every five minutes to _______________.