The study on washability of coal is done by using the _____________ technique?
Correct answer: D. Heavy media separation
- A. Tabling
- B. Elutriation
- C. None of these
- D. Heavy media separation
Explanation
Coal washability is determined by float-sink testing in liquids of controlled density, commonly represented by heavy-media separation. Tabling and elutriation are concentration methods but do not provide the standard washability curve.
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