| If two centrifuges are to be simultaneously used in series to treat residual fuel contaminated with both water and solids, how should the centrifuges be configured? |
| A) The first centrifuge should be set up as a clarifier and the second centrifuge should be set up as a purifier. |
| B) The first centrifuge should be set up as a purifier and the second centrifuge should be set up as a clarifier. |
| C) The first centrifuge should be set up as a purifier and the second centrifuge should also be set up as a purifier. |
| D) The first centrifuge should be set up as a clarifier and the second centrifuge should also be set up as a clarifier. |
