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?
⢠Moisture removal vs. particle filtration ā which component in a fuel system is specifically designed to separate water from fuel? ⢠Function of coalescing filters ā what does a coalescing type diesel oil filter actually do to water droplets in fuel? ⢠Proper use of vents vs. drains ā how do vent valves and drain valves each affect air, vapor, and liquid in a fuel system?
⢠Ask yourself: Which option actually removes water that has already collected in the fuel system, rather than just trying to keep new moisture out? ⢠Consider how a coalescing filter works: once water is collected or separated inside it, what must be done so that water does not eventually pass downstream? ⢠Look at each choice and decide: Is this a safe, normal maintenance practice, or could it create other hazards (like tank collapse, contamination, or unnecessary component wear)?
⢠Identify which device in the choices is designed to collect and hold water until it is removed. ⢠Verify which valve operation (vent vs. drain) will actually discharge liquid water instead of just air or vapor. ⢠Eliminate any practice that would restrict proper venting of tanks or focuses only on filter replacement for solids, not water.
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