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 flight velocity is u and the vehicle exhaust velocity is c, when is the propulsive efficiency maximum? |
| A. | u c |
| B. | u c |
| C. | u c |
| D. | c |
| Answer» B. u c | |
| 2. |
A shorter rocket length will help in _________ |
| A. | more vehicle structural mass |
| B. | lighter vehicle structure |
| C. | greater vehicle mass ratio |
| D. | greater complexity of the vehicle design |
| Answer» C. greater vehicle mass ratio | |
| 3. |
Which drag is specifically caused by the friction of air flowing over the vehicle s outer surface? |
| A. | Form drag |
| B. | Skin drag |
| C. | Shock drag |
| D. | Base drag |
| Answer» C. Shock drag | |
| 4. |
The rocket frontal area can be reduced by choosing a propellant with __________ |
| A. | higher propellant density |
| B. | lower propellant density |
| C. | higher propellant flammability |
| D. | lower propellant flammability |
| Answer» B. lower propellant density | |
| 5. |
The form drag depends on ___________ |
| A. | aeroelastic stresses |
| B. | solid structures far downstream |
| C. | solid structures far upstream |
| D. | aerodynamic shape of the body |
| Answer» E. | |
| 6. |
Which of the following can the gravitational losses?
|
| A. | nII) Increasing the angle between the normal to the local horizon and the flight path angle. |
| B. | Only I |
| C. | Only II |
| D. | Both I and II |
| E. | Neither I nor II |
| Answer» B. Only I | |
| 7. |
Which of the following is minimum for increasing the initial mass of the rocket? |
| A. | Increasing the thrust |
| B. | Adding more propellant |
| C. | Increase in structure |
| D. | Increase in specific impulse |
| Answer» D. Increase in specific impulse | |
| 8. |
Which of the following is not a way of reducing final mass mf of a rocket? |
| A. | Using a lesser portion of propellant for flight |
| B. | Using lighter structures |
| C. | Having smaller payloads |
| D. | Using lighter guidance/ control devices |
| Answer» B. Using lighter structures | |
| 9. |
The mass ratio has a/an ____________ effect on the final velocity increment of a rocket vehicle. |
| A. | logarithmic |
| B. | exponential |
| C. | linear |
| D. | parabolic |
| Answer» B. exponential | |
| 10. |
Vehicle s final velocity increment can be increased by using a _________ propellant. |
| A. | more energetic |
| B. | less energetic |
| C. | highly unstable |
| D. | highly stable |
| Answer» B. less energetic | |