Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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Which of the following is NOT a method for removing contaminants from oil?

Centripeting
Filtration
Settling
Centrifugation

The correct answer is: Centripeting

Centripeting is not a standard method for removing contaminants from oil. The correct term in the context of oil purification is "centrifugation." Centrifugation involves spinning oil at high speeds to separate out contaminants based on their density. This method effectively removes particulates, water, and other impurities. Filtration is a well-recognized technique that utilizes physical barriers to remove solid contaminants from liquids, making it a common method in oil treatment. Settling relies on gravitational forces to allow heavier contaminants to settle at the bottom of a container, which can then be drained off, thus purifying the oil. In comparison, centripeting, while it may sound similar to centrifugation, does not exist as a defined method for oil purification. Therefore, option A does not accurately describe an accepted practice in removing contaminants from oil.