USCG Merchant Mariner Credential (MMC) Licensing Exam

What is the function of a heat exchanger on a marine engine?

To cool the engine's freshwater coolant using raw seawater without mixing the two circuits To heat fuel before injection for better combustion in cold weather To transfer heat from the exhaust to the air intake system To warm seawater before it enters the engine cooling jackets

Correct Answer:

To cool the engine's freshwater coolant using raw seawater without mixing the two circuits

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