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Pick out the correct statement pertaining to the flow through a converging-diverging tube. | |
A. | The value of Mach number is always unity at the throat. [Wrong Answer] |
B. | No shock wave develops in the tube when the Mach number at exit is greater than unity. [Correct Answer] |
C. | Throughout the converging portion of the tube, the density increases in the downstream direction. [Wrong Answer] |
D. | none of these. [Wrong Answer] |