Engine: General Subjects

1. A The first centrifuge should be set up as a clarifier and the second centrifuge should be set up as a purifier.
2. B The first centrifuge should be set up as a purifier and the second centrifuge should be set up as a clarifier.
3. C The first centrifuge should be set up as a purifier and the second centrifuge should also be set up as a purifier.
4. D The first centrifuge should be set up as a clarifier and the second centrifuge should also be set up as a clarifier.

Tip: press A-D to answer