MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
Which of the following does the nozzle boundary layer depend on? |
| A. | I, II and III |
| B. | Only II and III |
| C. | Only I and III |
| D. | Only IIIView Answer |
| Answer» B. Only II and III | |
| 2. |
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 μm |
| B. | 10 μm |
| C. | 100 μm |
| D. | 1 μm |
| Answer» B. 10 μm | |
| 3. |
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 | |
| 4. |
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 | |
| 5. |
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% | |
| 6. |
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. | are assumed to have zero volume.Reason: Particles or droplets are very small in size.a) The assertion is correct, but the reason is incorrectb) Both assertion and reason are incorrectc) Both are correct and the reason is the correct explanation for the assertiond) Both are correct but the reason is not the correct explanation for the assertion |
| Answer» D. are assumed to have zero volume.Reason: Particles or droplets are very small in size.a) The assertion is correct, but the reason is incorrectb) Both assertion and reason are incorrectc) Both are correct and the reason is the correct explanation for the assertiond) Both are correct but the reason is not the correct explanation for the assertion | |
| 7. |
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. | |
| 8. |
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 | |