 
			 
			MCQOPTIONS
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				| 1. | In sedimentation, l – clear liquid zone, t- thick suspension zone, s- solid zone. Which of the following curve with height of the interface as the y-axis and the time as the x-axis represent the s-t interface? | 
| A. | a | 
| B. | b | 
| C. | neither a or b | 
| D. | a & b | 
| Answer» B. b | |