Which of the following statements is true concerning the lube oil system shown in the illustration? Illustration SE-0011

Correct Answer: Option D — The drains from lube oil coolers can be directed back to the main sump, the sludge tank or the lube oil purifier.

System piping flexibility allows lube oil cooler drains to be routed to multiple locations including the main sump, sludge tank, or purifier, facilitating effective contamination control and fluid management during maintenance or operational upsets.