MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Rocket Propulsion knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the motor axial specific impulse of a given nozzle is 340s for propellant ‘A’ and its characteristic velocity is 1400 m/s, determine the specific impulse for the same nozzle using a propellant ‘B’ with a characteristic velocity of 980 m/s. Assume both propellants ‘A’ and ‘B’ have the same specific heat ratio. |
| A. | 259 s |
| B. | 286 s |
| C. | 277 s |
| D. | 238 s |
| Answer» E. | |
| 2. |
For a scarfed nozzle, thrust coefficient, thrust and specific impulse are a function of ambient pressure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Motor axial specific impulse _____ with the scarf angle. |
| A. | increases |
| B. | decreases |
| C. | increases and then decreases |
| D. | decreases and then increases |
| Answer» C. increases and then decreases | |
| 4. |
Conventional axisymmetric conical nozzle with a cylindrical extension is called as ______ |
| A. | cant nozzle |
| B. | bell-shaped nozzle |
| C. | scarfed nozzle |
| D. | aerospike nozzle |
| Answer» D. aerospike nozzle | |
| 5. |
If the nozzle exit is flush with the missile skin, then the nozzle scarf angle and cant angle is the same. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which of the following doesn’t belong to misalignment due to irregularities in nozzle geometry? |
| A. | Out of round |
| B. | Unsymmetrical roughness |
| C. | Protuberances |
| D. | Nozzle extensions |
| Answer» E. | |
| 7. |
In general, the rocket nozzle exits surface’s geometric axis is taken to be the __________ |
| A. | gimbal axis |
| B. | roll axis |
| C. | thrust axis |
| D. | lift axis |
| Answer» D. lift axis | |
| 8. |
What will not help in generating a turning moment in a flying vehicle? |
| A. | Thrust vector deflection |
| B. | Aerodynamic fins |
| C. | Using separate engines for attitude control |
| D. | Altering the nozzle exit area by using nozzle extensions |
| Answer» E. | |
| 9. |
Which among the following is the most necessary for controlled turning and attitude control? |
| A. | Turning moments |
| B. | High exhaust velocity |
| C. | Vortex generators |
| D. | Dorsal fins |
| Answer» B. High exhaust velocity | |
| 10. |
What will happen when the thrust line doesn’t intersect the center of mass of a flying vehicle? |
| A. | The vehicle experiences a centripetal acceleration |
| B. | The vehicle drops in altitude |
| C. | The vehicle trajectory becomes zigzag |
| D. | The vehicle tries to rotate in flight |
| Answer» E. | |