Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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What is the primary use of centrifugal purifiers?

To cool liquids
To separate heavy liquids from light liquids
To hydrate oil
To measure oil density

The correct answer is: To separate heavy liquids from light liquids

Centrifugal purifiers are primarily used to separate heavy liquids from light liquids through the process of centrifugal force. In this mechanism, the mixture of liquids is spun at high speeds, which causes the denser liquid to move outward toward the perimeter of the rotating drum, while the lighter liquid remains closer to the center. This separation is useful in various industry applications, particularly in the processing of fuels and lubricants, where it is crucial to remove contaminants that may have different densities. Using centrifugal force allows for efficient separation compared to other methods, making it an ideal choice for processes that require the isolation of different liquid components. The effectiveness of this method is heavily reliant on the differences in density between the liquids being separated.