A. The value of Mach number is always unity at the throat
B. No shock wave develops in the tube when the Mach number at exit is greater than unity
C. Throughout the converging portion of the tube, the density increases in the downstream
direction
D. None of these
Correct Answer: No shock wave develops in the tube when the Mach number at exit is greater than unity ✔
Last Updated: March 11, 2019