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				| 1. | What is the value for α for mechanical aeration aeration for the following equation.$ | 
| A. | </sub> /K<sub>LA(Tap water)</sub> | 
| B. | 0.6-1.2 | 
| C. | 0.2-0.3 | 
| D. | 0.3-0.5 | 
| Answer» B. 0.6-1.2 | |