Choked flow in a convergent–divergent steam nozzle Statement: In a C–D nozzle, the mass discharge rate depends on the initial (inlet) steam conditions and the throat area (once choked), not on the exit pressure. Decide whether the statement is correct.

ConceptAfter the back pressure is reduced to the critical (choked) value, the throat Mach number is 1. The mass flow then becomes a function of inlet state and throat area only; further reduction of exit pressure does not increase discharge.

Final AnswerTrue