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. |
Heat generation in the first zone of the atomization region is relatively low because of ________ |
| A. | liquids and gases are relatively hot |
| B. | vaporization causing a cooling effect |
| C. | vaporization causing fuel-rich and fuel-lean regions |
| D. | low flow velocity in the injector zone |
| Answer» D. low flow velocity in the injector zone | |
| 2. |
The atomization region before the rapid combustion zone is _______ |
| A. | homogenous |
| B. | heterogeneous |
| C. | isentropic |
| D. | isothermal |
| Answer» C. isentropic | |
| 3. |
Evaporation of the atomized droplets can happen due to heat transferred by ________ |
| A. | radiation from rapid combustion zone, but not by convection from moderately hot gases in the first zone |
| B. | radiation from rapid combustion zone and by convection from moderately hot gases in the first zone |
| C. | convection from moderately hot gases in the first zone, but not by radiation from rapid combustion zone |
| D. | neither radiation from rapid combustion zone nor by convection from moderately hot gases in the first zone |
| Answer» C. convection from moderately hot gases in the first zone, but not by radiation from rapid combustion zone | |
| 4. |
Propellants injected through the injector orifices travel at velocities between _______ |
| A. | 0 and 22 m/s |
| B. | 7 and 60 m/s |
| C. | 23 and 98 m/s |
| D. | 105 and 320 m/s |
| Answer» C. 23 and 98 m/s | |
| 5. |
The liquid droplets that remains in the upstream portion of rapid combustion zone do not transverse downstream with ease. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The mixing in rapid combustion zone is not aided by ___________ |
| A. | local turbulence |
| B. | diffusion of the gas species |
| C. | supersonic compression waves |
| D. | vaporization of the liquid propellants |
| Answer» D. vaporization of the liquid propellants | |
| 7. |
In which of the zones does any remaining liquid droplets of the propellants get vaporized by convective heating? |
| A. | Rapid combustion zone |
| B. | Stream tube combustion zone |
| C. | Transonic-flow zone |
| D. | Supersonic expansion zone |
| Answer» B. Stream tube combustion zone | |
| 8. |
Which of the following with regards to mixing and reaction in the combustion chamber is incorrect? |
| A. | Turbulent mixing |
| B. | Multiple chemical reactions |
| C. | Temperature rise increases densities |
| D. | Local mixture ratio variations |
| Answer» D. Local mixture ratio variations | |
| 9. |
The boundaries between the discrete combustion zones inside the combustion chamber is not ________ |
| A. | undulating |
| B. | immovable |
| C. | irregular |
| D. | local variations |
| Answer» C. irregular | |
| 10. |
Which of the following zones is not a part of the thrust chamber? |
| A. | Atomization zone |
| B. | Rapid-combustion zone |
| C. | Stream tube combustion zone |
| D. | Transonic flow zone |
| Answer» B. Rapid-combustion zone | |