MCQOPTIONS
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MCQOPTIONS
| 1. |
With how much pressure the air is filled in the aeration tank? |
| A. | 70-90kN/m<sup>2</sup> |
| B. | 34-56kN/m<sup>2</sup> |
| C. | 10-20kN/m<sup>2</sup> |
| D. | 35-70kN/m<sup>2</sup> |
| Answer» E. | |