Aerospace Engineering > GATE 2021 > Nozzle Flow
The figure shows schematics of wave patterns at the exit of nozzles A and B operating at different pressure ratios.
Nozzles A and B, respectively, are said to be operating in: _______.
A
over-expanded mode and under-expanded mode
B
under-expanded mode and perfectly expanded mode
C
perfectly expanded mode and under-expanded mode
D
under-expanded mode and over-expanded mode

Correct : a

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