The platform supply vessel to which you are assigned has a main engine fuel system as shown in the illustration. When the filter and water separator as shown in the day tank fill line are combined into one unit, what is this called? Illustration MO-0152
• Function of a fuel oil water separator versus a simple filter • Difference between absorption/adsorption (holding contaminants in the media) and coalescing (making droplets combine) • Role of a strainer compared with a fine filter in a fuel system
• Ask yourself: when one unit both removes solid particles and separates out water from fuel, what process does it usually rely on to get the water to drop out? • Which of the listed types is specifically designed to make many tiny water droplets form larger droplets so they can be drained from the bottom of the housing? • Which option describes only coarse screening of debris, and which options describe fine fuel conditioning used before the day tank or engine?
• Make sure the option you choose can both filter solids and separate water in a single housing • Eliminate any choice that only performs coarse straining and does not change the size/behavior of water droplets • Verify that the term you select is commonly used for fuel oil filter/water separator combinations in marine diesel systems
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