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| Q. |
In an activated sludge process which type of pump is used to recirculate the sludge? |
| A. | booster pump |
| B. | centrifugal pump |
| C. | vane pump |
| D. | vertical turbine pump |
| Answer» B. centrifugal pump | |
| Explanation: the activated sludge does not contain any solids. also, it is not very viscous. hence a centrifugal pump can be used for this application. | |
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