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. |
Consider two rocket engines A and B with A having a specific impulse of 242s and B having a specific impulse of 150s. What can be said about their efficiency? |
| A. | Both A and B are equally efficient |
| B. | A is more efficient than B |
| C. | B is more efficient than A |
| D. | Efficiency doesn t depend on specific impulse |
| Answer» C. B is more efficient than A | |
| 2. |
Given that the total impulse is 25000 Ns and specific impulse is 300s, find out the effective propellant mass for a burn duration of 8s. |
| A. | 17 kg |
| B. | 8.5 kg |
| C. | 34 kg |
| D. | 68 kg |
| Answer» C. 34 kg | |
| 3. |
For a rocket, the specific impulse was found to be 250s. Given that the thrust force is constant and assuming gravity-free and drag-free conditions, what will the thrust force be for a mass flow rate of the form (4t2-3t) kg/s and a burn duration of 3s? |
| A. | 18375 N |
| B. | 12426 N |
| C. | 25234 N |
| D. | 15595 N |
| Answer» B. 12426 N | |
| 4. |
Suppose the thrust force of a rocket varies with time t as F = 250(3t2 + 2t). Then find out the total impulse for a burn duration of 4s. |
| A. | 10000 Ns |
| B. | 20000 Ns |
| C. | 40000 Ns |
| D. | 80000 Ns |
| Answer» C. 40000 Ns | |
| 5. |
For a constant thrust of 6000 N, find the total impulse for the burning time of 3s. |
| A. | 36000 Ns |
| B. | 18000 Ns |
| C. | 9000 Ns |
| D. | 0 Ns |
| Answer» C. 9000 Ns | |
| 6. |
What is the typical liquid propellant feed system used in space launch vehicles? |
| A. | The Gas pressure feed system |
| B. | Pump-fed system |
| C. | Gravity assisted feed system |
| D. | No feed system is used |
| Answer» C. Gravity assisted feed system | |
| 7. |
Which of the following pressure feed systems is mostly used in attitude control of liquid propellant rocket engine with more than one thrust chamber per engine? |
| A. | The Gas pressure feed system |
| B. | Pump-fed system |
| C. | Gravity assisted feed system |
| D. | No feed system is used |
| Answer» B. Pump-fed system | |
| 8. |
What is the range of temperature of reaction product gases in a rocket engine? |
| A. | 500 to 1700 C |
| B. | 1700 to 2500 C |
| C. | 2500 to 4100 C |
| D. | 4100 to 6900 C |
| Answer» D. 4100 to 6900 C | |
| 9. |
Which of the following is not a valid classification of rocket engines based on their energy source? |
| A. | Chemical |
| B. | Geothermal |
| C. | Solar |
| D. | Nuclear |
| Answer» C. Solar | |
| 10. |
Which of the following is not an air-breathing engine? |
| A. | Turbojet |
| B. | Turbofan |
| C. | Rocket |
| D. | Scramjet |
| Answer» D. Scramjet | |