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| Q.9 | According to Indian standards the value of sludge index for normal sludge ranges between ______. | |
| Ans | A. 500-1000 | |
| B. 10-150 | ||
| C. 150-350 | ||
| D. 0-10 | ||
| Note: For this question, discrepancy is found in question/answer. So, This question is ignored for all candidates. |
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