MCQOPTIONS
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| 1. |
Aerobic bio degradation has a minimum oxygen requirement of __________ |
| A. | 0.5 mg/litre |
| B. | 2 mg/litre |
| C. | 1 mg/litre |
| D. | 1.5 mg/litre |
| Answer» C. 1 mg/litre | |