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Pick out the correct statement. | |
A. | Fanning friction factor is inversely proportional to Reynolds number always. [Wrong Answer] |
B. | The property of a randomly packed bed (with raschig rings) is given by the ratio of the total volume to the volume of voids in the bed. [Wrong Answer] |
C. | Mach number in an incompressible fluid is always unity. [Wrong Answer] |
D. | Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow. [Correct Answer] |