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1. |
An orifice is an opening in a vessel with |
A. | closed perimeter of regular shape through which water flows |
B. | the water level of the liquid on the up stream side is below the top of the orifice |
C. | partially full flow |
D. | prolonged sides having length of 2 to 3 diameters of the opening in thick wall. |
Answer» B. the water level of the liquid on the up stream side is below the top of the orifice | |