MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
What is the average diameter of a solid particle in a nozzle flow above which there is a chance of occurrence of thermal lag? |
| A. | 0.1 m |
| B. | 10 m |
| C. | 100 m |
| D. | 1 m |
| Answer» B. 10 m | |
| 2. |
In which of the following modes of analysis does the temperature, velocity or pressure at any normal cross-section of an axisymmetric nozzle remain to be the same? |
| A. | One dimensional |
| B. | Two dimensional |
| C. | Three dimensional |
| D. | N-dimensional, where N can be 1,2,3, |
| Answer» B. Two dimensional | |
| 3. |
In which of the following cases is the chemical equilibrium maintained instantaneously, even though the gas composition varies through the nozzle due to temperature and pressure variations along the nozzle? |
| A. | Frozen equilibrium |
| B. | Non-equilibrium |
| C. | Shifting equilibrium |
| D. | Isothermal equilibrium |
| Answer» D. Isothermal equilibrium | |
| 4. |
What is the typical value of penalty incurred by assuming a frozen equilibrium rocket performance? |
| A. | 1-4% |
| B. | 0% |
| C. | 12-15% |
| D. | 25-30% |
| Answer» B. 0% | |
| 5. |
Assertion: The condensed phases (liquid and solid) are assumed to have zero volume.Reason: Particles or droplets are very small in size. |
| A. | The assertion is correct, but the reason is incorrect |
| B. | Both assertion and reason are incorrect |
| C. | Both are correct and the reason is the correct explanation for the assertion |
| D. | Both are correct but the reason is not the correct explanation for the assertion |
| Answer» D. Both are correct but the reason is not the correct explanation for the assertion | |
| 6. |
Which of the following effects are neglected for simple cases of nozzle expansion? |
| A. | Heat exchange |
| B. | Frictional effects |
| C. | Divergence angle |
| D. | Reversibility |
| Answer» E. | |
| 7. |
Which of the following is not true for an ideal expansion in the nozzle? |
| A. | Adiabatic, reversible expansion |
| B. | Drop in static temperature and pressure |
| C. | Drop in stagnation temperature and pressure |
| D. | Conversion of thermal to kinetic energy |
| Answer» D. Conversion of thermal to kinetic energy | |