Steam Plants (Boilers & Turbines) USCG Question #160 (Set 6)

Lube oil temperature leaving the lube oil coolers is regulated by throttling the __________.

Official USCG Answer & Rule Citation

Correct Answer: Option A — cooling water outlet valve

Throttling the seawater outlet valve on a lube oil cooler controls the cooling medium flow rate, allowing precise temperature regulation of the effluent lubricating oil.

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