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. |
For a rocket having 95% combustion efficiency, total chemical power of 17MW, a mass flow rate of propellants of 15 kg/s, and effective jet exhaust velocity of 1443 m/s, find the internal efficiency of rocket propulsion. |
| A. | 97% |
| B. | 95% |
| C. | 93% |
| D. | 91% |
| Answer» B. 95% | |
| 2. |
Which of the following is not a way of losing energy in a chemical rocket? |
| A. | Poor mixing |
| B. | Incomplete burning |
| C. | Heat loss to the walls |
| D. | Radial combustion propagation |
| Answer» E. | |
| 3. |
If a propulsion system produces a thrust of 5 kN, exhaust velocity of 4500 m/s, and vehicle velocity of 3000 m/s, what is the power transmitted to the vehicle? |
| A. | 225 MW |
| B. | 75 MW |
| C. | 10 MW |
| D. | 15 MW |
| Answer» E. | |
| 4. |
For a propulsive device, if power available is denoted by P1, power input by P2, combustion efficiency by e, then which of the following expression is correct? |
| A. | P1=P2*e |
| B. | P1=P2/e |
| C. | P1=P2/e<sup>2</sup> |
| D. | P1=P2*e<sup>2</sup> |
| Answer» B. P1=P2/e | |
| 5. |
Which of the following Is the maximum energy available per unit mass of chemical propellants? |
| A. | heat of combustion |
| B. | enthalpy of vaporization |
| C. | enthalpy of atomization |
| D. | enthalpy of fusion |
| Answer» B. enthalpy of vaporization | |
| 6. |
What is the way of production of energy in a chemical rocket? |
| A. | Ionization of propellants |
| B. | Combustion of propellants |
| C. | Expulsion of propellants |
| D. | Atomization of propellants |
| Answer» C. Expulsion of propellants | |
| 7. |
If a chemical rocket has a jet power of 18 MW, inert mass of 50 kg, a propellant mass of 1000 kg, then what is its specific power? |
| A. | 34.28 kW/kg |
| B. | 17.14 kW/kg |
| C. | 8.91 kW/kg |
| D. | 25.43 kW/kg |
| Answer» C. 8.91 kW/kg | |
| 8. |
If the power of the jet is given to be 25 MW for a chemical rocket having a weight flow rate of 147 N/s, find out the vehicle s specific impulse. |
| A. | 98.2 s |
| B. | 372.6 s |
| C. | 186.3 s |
| D. | 243.5 s |
| Answer» D. 243.5 s | |
| 9. |
For a constant gas ejection velocity (v) of 1440 m/s and a mass flow rate (m) of 15 kg/s, find the power of the jet (Pjet). |
| A. | 7.78 MW |
| B. | 15.55 MW |
| C. | 31.10 MW |
| D. | 62.21 MW |
| Answer» C. 31.10 MW | |
| 10. |
Which form of energy is most useful for propulsion? |
| A. | The kinetic energy of ejected matter |
| B. | The chemical energy of combustion of propellants |
| C. | The potential energy of the rocket at some altitude |
| D. | The electrical energy of the rocket control system |
| Answer» B. The chemical energy of combustion of propellants | |