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. |
____________ is limited by the possibility of excessive cavitation. |
| A. | Maximum shaft speed |
| B. | Minimum shaft speed |
| C. | Maximum pump gear ratio |
| D. | Minimum pump gear ratio |
| Answer» B. Minimum shaft speed | |
| 2. |
If the densities of the propellants are very different from one another, the pump head raise is ___________ for the lower-density propellant compared to higher-density propellant. |
| A. | higher |
| B. | lower |
| C. | equal for both the propellants |
| D. | 0 |
| Answer» B. lower | |
| 3. |
The total propellant flow at the pump outlet is ____________ the flow in combustion chamber and the discharge pressure is __________ chamber pressure plus the other insignificant pressure losses in the system. |
| A. | more than; less than |
| B. | more than; more than |
| C. | less than; more than |
| D. | equal to; equal to |
| Answer» E. | |
| 4. |
Which of these will lead to lower reliability from design perspective of turbopumps? |
| A. | Lower efficiency and higher mass |
| B. | Higher efficiency and lower mass |
| C. | Higher efficiency and higher mass |
| D. | Lower efficiency and lower mass |
| Answer» C. Higher efficiency and higher mass | |
| 5. |
A geared turbopump has ___________ efficiency for the turbine and ____________ efficiency for the pump. |
| A. | lower; lower |
| B. | lower; higher |
| C. | higher; lower |
| D. | higher; higher |
| Answer» E. | |
| 6. |
The bearings and shaft seals are cooled using ____________ |
| A. | part of the propellant flow |
| B. | radiation cooling |
| C. | part of the Exhaust Flow from the nozzle |
| D. | lubricants |
| Answer» B. radiation cooling | |
| 7. |
Majority of the kinetic energy imparted by the impeller to the flow is converted to ___________ in diffuser. |
| A. | potential energy |
| B. | hydrostatic pressure |
| C. | frictional losses |
| D. | internal energy |
| Answer» C. frictional losses | |
| 8. |
The propellant enters the pump through __________ |
| A. | duct |
| B. | pipe |
| C. | injector |
| D. | inducer |
| Answer» E. | |
| 9. |
Main purpose of a turbopump is to ____________ |
| A. | decrease the temperature of flowing propellant |
| B. | increase the temperature of flowing propellant |
| C. | decrease the pressure of flowing propellant |
| D. | increase the pressure of flowing propellant |
| Answer» E. | |
| 10. |
Which of the following is the term used to denote a turbine with one or more pumps? |
| A. | Turboshaft |
| B. | Turbopump |
| C. | Turboprop |
| D. | Turbojet |
| Answer» C. Turboprop | |