Question

When a nozzle is said to be over expanded?

• A. Pressure at exit is less than the backpressure
• B. Pressure at exit is higher than the backpressure
• C. Pressure at exit is equal to the backpressure
• D. Pressure at exit is equal to zero

Hint:

In rocket engine design, ensuring that the exit pressure matches ambient pressure is crucial for optimal performance and efficiency.

Answer 1

The Correct Option is A

A nozzle is said to be over expanded when the exit pressure is less than the ambient or backpressure. This condition can lead to flow separation within the nozzle and potentially cause structural and performance issues for rocket engines or jet propulsion systems.