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 the following comes under the category of operational factors in a propellant budget? |
| A. | Variation in tank volume |
| B. | Attempting a complex maneuver |
| C. | Filling more propellant than needed into a tank |
| D. | Pressurizing cryogenic propellant tanks |
| Answer» D. Pressurizing cryogenic propellant tanks | |
| 2. |
In order to meet a minimum total impulse requirement for a rocket engine displaying off-nominal performance and showing variations in mixture ratio, what has to be done? |
| A. | Extra propellant to be used to allow for mixture ratio variations |
| B. | Suppress the required propellant injection and attempt the mixture ratio correction |
| C. | Halt the operation and replace the necessary component |
| D. | Change the mission trajectory accordingly |
| Answer» B. Suppress the required propellant injection and attempt the mixture ratio correction | |
| 3. |
Which of the following occurs due to the variations in the manufacture of hardware from one engine to another? |
| A. | Thrust vectoring |
| B. | Loading uncertainty |
| C. | Off-nominal performance |
| D. | Operational factors |
| Answer» D. Operational factors | |
| 4. |
What is the amount of propellants estimated to be that of the residual propellant that clings to the tank walls or remains trapped in valves, injector passages, pipes or cooling passages? |
| A. | 0.1-0.2% of the total load |
| B. | 0.25-0.5% of the total load |
| C. | 0.5-2% of the total load |
| D. | 5-10% of the total load |
| Answer» D. 5-10% of the total load | |
| 5. |
The extra propellant required to compensate for the thrust decrease due to the operation of TVC’s component operating against the vehicle velocity direction is _________ of the amount of total propellants. |
| A. | 0.1 to 4% |
| B. | 4 to 6% |
| C. | 0.8 to 10% |
| D. | 1 to 5% |
| Answer» B. 4 to 6% | |
| 6. |
In a turbopump system using a gas generator cycle, the flame temperature in the separate gas generator where a small portion of overall propellant is burned is _________ compared to the main gas generator and its mixture ratio is _________ compared to that of the main gas generator. |
| A. | same, lower |
| B. | lower, different |
| C. | lower, higher |
| D. | higher, different |
| Answer» C. lower, higher | |
| 7. |
For a spacecraft propulsion system using pressurized monopropellant feed system, what is the allocated amount of propellants to be used for the main thrust chamber? |
| A. | 70-90% |
| B. | 10-50% |
| C. | 50-70% |
| D. | 95-99% |
| Answer» B. 10-50% | |
| 8. |
How much amount of propellants is allowed in the propellant budget for off-nominal operations in a spacecraft propulsion system with a pressurized monopropellant feed system? |
| A. | 0.5-1% of the total load |
| B. | 0.5% of the total load |
| C. | 0.5-2% of the total load |
| D. | 0.25-1% of the total load |
| Answer» E. | |
| 9. |
What is the typical amount of propellant (in percentage) used for a spacecraft propulsion system with a pressurized monopropellant feed system for contingency? |
| A. | 2-10% of the total load |
| B. | 0.5-2% of the total load |
| C. | 70-90% of the total load |
| D. | 5-15% of the total load |
| E. | used for a spacecraft propulsion system with a pressurized monopropellant feed system for contingency?a) 2-10% of the total loadb) 0.5-2% of the total loadc) 70-90% of the total loadd) 5-15% of the total load |
| Answer» B. 0.5-2% of the total load | |
| 10. |
Liquid propellants can only use for producing thrust and increasing the velocity of the vehicle. |
| A. | True |
| B. | False |
| Answer» C. | |