62. The maximum lube oil temperature leaving the lube oil cooler of a main steam turbine propulsion system should __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — never exceed 130°F
Marine engineering standards dictate that lubricating oil temperature leaving the cooler must be regulated to prevent thermal breakdown, typically maintained around 120°F to 130°F and never exceeding the upper limit of 130°F.
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