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. |
Acoustically stimulated variations in droplet mixing and/or vaporization can cause ___________ |
| A. | screeching |
| B. | spinning wave |
| C. | traveling wave |
| D. | pogo |
| Answer» B. spinning wave | |
| 2. |
Tangential mode of instability has the following modes ____________ |
| A. | standing and travelling waves |
| B. | travelling and spinning waves |
| C. | travelling and longitudinal waves |
| D. | spinning and radial waves |
| Answer» B. travelling and spinning waves | |
| 3. |
Transverse mode of high-frequency instability propagation can be broken into ___________ |
| A. | longitudinal and radial modes |
| B. | longitudinal and tangential modes |
| C. | radial, tangential and longitudinal modes |
| D. | tangential and radial modes |
| Answer» E. | |
| 4. |
Which of the following combustion instabilities happen due to propellant flow rate disturbances? |
| A. | Screeching |
| B. | Entropy waves |
| C. | Screaming |
| D. | Pogo |
| Answer» E. | |
| 5. |
Which of the following combustion instabilities occur due to propellant pump cavitation? |
| A. | Buzzing |
| B. | Chugging |
| C. | Pogo |
| D. | Screaming |
| Answer» C. Pogo | |
| 6. |
high-frequency combustion instability is called ________ |
| A. | squealing |
| B. | buzzing |
| C. | chugging |
| D. | entropy waves |
| Answer» B. buzzing | |
| 7. |
Intermediate frequency combustion instability is called ________ |
| A. | squealing |
| B. | chugging |
| C. | screaming |
| D. | buzzing |
| Answer» E. | |
| 8. |
low-frequency combustion instability is called ________ |
| A. | chugging |
| B. | buzzing |
| C. | squealing |
| D. | screaming |
| Answer» B. buzzing | |
| 9. |
Which of the following terms best describe the combustion when the pressure fluctuations during steady operation is 12% of the mean chamber pressure? |
| A. | Complete combustion |
| B. | Incomplete combustion |
| C. | Smooth combustion |
| D. | Rough combustion |
| Answer» E. | |
| 10. |
Which of the following terms best describes the combustion when the pressure fluctuation during steady operation is 4% of the mean chamber pressure? |
| A. | Smooth combustion |
| B. | Rough combustion |
| C. | Combustion instability |
| D. | Complete combustion |
| Answer» B. Rough combustion | |