Question 54General Subjects - QMED

The correct answer is C) prevent separated oil from mixing with the incoming bilge water. The illustration GS-0153 depicts an oily-water separator, a device used on ships to remove oil from bilge water before discharge. Item "7" is likely a valve or fitting that allows the separated oil to exit the device, while preventing the oil from re-mixing with the cleaner bilge water. This ensures that only the oil-free water is discharged, in compliance with environmental regulations for vessel discharges. The other options are incorrect because: A) refers to the coalescer bed, not item 7; B) refers to a tank access panel, not the function of item 7; and D) is similar to the correct answer, but does not specifically mention preventing oil from mixing with incoming bilge water.