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Prateek Asked :

19-09-2021 Rocket Propulsion

Q. Select the correct option for an ideal rocket engine.

A. The exhaust gases leaving the rocket need not be axially directed
B. Across any cross-section normal to the nozzle axis, gas velocity need not be uniform
C. The gas composition can vary across the nozzle
D. Cryogenic propellants need to be stored at their boiling points

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Dapzoi Verified
Commented on 2021-09-19 16:06:59 (IST)
Answer: D

Explanation: Exhaust gases leaving the ideal rocket nozzle is axially directed. Gas pressure, temperature, and velocity needs to be uniform across the nozzle axis and the gas composition remains the same along with the nozzle.