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. |
Which of these is a reasonable value of the mass ratio (Initial mass/inert mass) for multistage vehicles for gravitation free drag-free space flight? |
| A. | 100 |
| B. | 1000 |
| C. | 200 |
| D. | 20 |
| Answer» D. 20 | |
| 2. |
Which of these is a reasonable value of the mass ratio (Initial mass/inert mass) for single-stage vehicles for gravitation free drag-free space flight? |
| A. | 100 |
| B. | 1000 |
| C. | 200 |
| D. | 20 |
| Answer» E. | |
| 3. |
Which of the following will decrease the effective propellant fraction? |
| A. | Higher system inert mass |
| B. | More favorable nozzle area ratio |
| C. | Higher chamber pressure |
| D. | Higher temperature at the inlet of the nozzle |
| Answer» B. More favorable nozzle area ratio | |
| 4. |
What is the effect of increasing mass ratio (mo/mb, where mo is the initial mass and mb is the burnout mass) on Isp? |
| A. | Increases |
| B. | Decreases |
| C. | No effect |
| D. | Increases only after a limit |
| Answer» B. Decreases | |
| 5. |
For given average effective exhaust velocity(c), which of the following values of propellant mass fractions( ) gives maximum vehicle velocity (up)? |
| A. | 0.6 |
| B. | 0.7 |
| C. | 0.8 |
| D. | 0.9 |
| Answer» E. | |
| 6. |
Keeping the system inert mass constant, which of the following changes will not result in flight velocity increment? |
| A. | Use of better propellants |
| B. | A more favorable nozzle area ratio |
| C. | Higher chamber pressure |
| D. | Better nozzle cooling |
| Answer» E. | |
| 7. |
What is the nature of the effect of the propellant mass fraction on the vehicle velocity? |
| A. | Exponential |
| B. | Logarithmic |
| C. | Linear |
| D. | Parabolic |
| Answer» C. Linear | |
| 8. |
Where do we account for residual propellant mass in a rocket engine? |
| A. | Propellant mass |
| B. | Inert mass |
| C. | Payload mass |
| D. | Structural mass |
| Answer» C. Payload mass | |
| 9. |
How will propellant mass flow and thrust change with burn duration in a gravity-free, drag-free environment? |
| A. | Mass flow and thrust remains constant |
| B. | Mass flow increases, thrust decreases |
| C. | Mass flow decreases, thrust increases |
| D. | Mass flow decreases, thrust decreases |
| Answer» B. Mass flow increases, thrust decreases | |
| 10. |
What is the nature of the trajectory of rockets in gravity-free, drag-free environment? |
| A. | Two-dimensional, curved path |
| B. | One dimensional, curved path |
| C. | Two-dimensional, straight line path |
| D. | One dimensional, straight line path |
| Answer» E. | |