MCQOPTIONS
Saved Bookmarks
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. |
Valves are often opened to allow full flow into the combustion chamber. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following doesn’t happen if the starting controls are improperly designed? |
| A. | Accumulation of unburned propellants in the combustion chamber |
| B. | Explosion upon ignition |
| C. | Eventual damage to rocket engine |
| D. | Increase in dripping flow |
| Answer» E. | |
| 3. |
Verification of initial burning or ignition is done via ________ for visual detection and ________ for heat detection in some rocket engines. |
| A. | photocell; pyrometer |
| B. | pyrometer; photocell |
| C. | bolometer; pyrometer |
| D. | load cell; pyrometer |
| Answer» B. pyrometer; photocell | |
| 4. |
Military missiles generally use ___________ rocket engines. |
| A. | ion-electric |
| B. | chemical |
| C. | nuclear |
| D. | solar |
| Answer» C. nuclear | |
| 5. |
A tactical missile is not used for _________ |
| A. | attacking ground troops |
| B. | defending ground troops |
| C. | attacking military aircrafts |
| D. | decoy flare |
| Answer» E. | |
| 6. |
For a missile weighing 60 kg cruising with constant velocity 110 m/s, with lift-to-drag ratio of 8 and Isp of 200, determine the range if the final mass of the missile is 25 kg. |
| A. | 119 km |
| B. | 132 km |
| C. | 154 km |
| D. | 198 km |
| Answer» D. 198 km | |
| 7. |
Propellants that are thick or viscous under static conditions, but flow through valves, injectors, pipes or pumps when adequate shear stress is applied are called __________ propellants. |
| A. | Thixotropic |
| B. | Dilatant |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» B. Dilatant | |
| 8. |
Which of the following will not happen if small aluminum particles are suspended in the fuel or if small inert solid particles are suspended in the oxidizer? |
| A. | Increase in propellant density |
| B. | Reduction in tank and vehicle size |
| C. | Decrease in density impulse |
| D. | Increase in speed and range of atmospheric rockets or missiles |
| Answer» D. Increase in speed and range of atmospheric rockets or missiles | |
| 9. |
Which of the following can’t happen if a chemical rocket engine were to use gelled propellants? |
| A. | Increase in specific impulse |
| B. | Increase in density impulse |
| C. | Possibility of short-duration pulsing |
| D. | Much less likely to have explosions |
| Answer» B. Increase in density impulse | |
| 10. |
Which of the following is not a method of achieving a variable thrust? |
| A. | Injecting liquid into the gas streams before injection |
| B. | Varying injection element area |
| C. | Varying the nozzle throat area |
| D. | Varying feed system pressure drops |
| Answer» B. Varying injection element area | |