An ideal nozzle design aims at________________?
Correct answer: C. Both A. & B.
- A. Minimising wall friction
- B. Suppressing boundary layer separation
- C. Both A. & B.
- D. Neither A. nor B.
Explanation
A good nozzle design reduces wall-friction losses and maintains an attached boundary layer to prevent separation. Both objectives improve pressure-to-velocity conversion, so both A and B apply.
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