 
			 
			MCQOPTIONS
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				| 1. | How can biofilm formation be prevented? | 
| A. | tBy installing a microfilter prior to Reverse Osmosis | 
| B. | tBy installing a nanofilter prior to Reverse Osmosis | 
| C. | tBy installing a ultrafilter prior to Reverse Osmosis | 
| D. | tBy installing a pressure sand filter prior to Reverse Osmosis | 
| Answer» B. tBy installing a nanofilter prior to Reverse Osmosis | |