 
			 
			MCQOPTIONS
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				| 1. | Why a surface integral is used to represent flow of B into and out of the control volume? | 
| A. | Control volume is moving | 
| B. | Flow of fluid is through the control surfaces | 
| C. | Fluid only on the control surfaces | 
| D. | Control volume is stationary | 
| Answer» C. Fluid only on the control surfaces | |