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| Q. |
Which of the following statement is correct? |
| A. | Sewage, if not treated, will create healthy conditions. |
| B. | Secondary treatment of sewage works on hydraulic separation principle. |
| C. | Primary clarifiers are to the sedimentation tanks located just after the girt chambers. |
| D. | Trickling filter is different from percolating filter. |
| Answer» C. Primary clarifiers are to the sedimentation tanks located just after the girt chambers. | |
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