 
			 
			MCQOPTIONS
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				| 1. | What is the concentration of electrolytes that are commonly used in ES drilling? | 
| A. | 1 to 10wt % | 
| B. | 12 to 20wt % | 
| C. | 23 to 30wt % | 
| D. | 34 to 50wt % | 
| Answer» C. 23 to 30wt % | |