What maintenance practice represents the best protection against moisture carryover to the fuel injection system of the main engines on board your general-purpose supply vessel?

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Periodically opening, then reclosing, the drain valve on coalescing type diesel oil filters

Answer

Closing the diesel oil day tank vents, particularly when the relative humidity is high

Answer

Periodically opening, then reclosing, the vent valve on coalescing type diesel oil filters

Answer

Frequently replacing fuel injection pump and injector nozzle inlet fuel filters

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