Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a _____________ operation?
Correct answer: D. Classification
- A. Clarification
- B. Sedimentation
- C. Flocculation
- D. Classification
Explanation
Elutriation separates fine particles according to their settling velocities in an upward-flowing fluid, so it is a classification operation. Clarification removes suspended solids from a liquid, whereas flocculation agglomerates them.
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