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. |
Acoustic velocity in ideal gases is independent of _____________ |
| A. | nature of the gas |
| B. | gas temperature |
| C. | gas pressure |
| D. | the molecular mass of the gas |
| Answer» D. the molecular mass of the gas | |
| 2. |
Which of the following doesn’t happen during a subsonic and isentropic nozzle expansion? |
| A. | Increase in the specific volume |
| B. | Decrease in absolute fluid static temperature |
| C. | Decrease in static pressure |
| D. | Decrease in stagnation temperature |
| Answer» E. | |
| 3. |
For an isentropic flow of air through a pipe from a large chamber having a pressure of 5 MPa and temperature of 290 K, determine the temperature at a point along the length of the pipe where the pressure is 3 MPa. |
| A. | 250 K |
| B. | 277 K |
| C. | 219 K |
| D. | 300 K |
| Answer» B. 277 K | |
| 4. |
Which of the following is not a unit of gas constant? |
| A. | J/(mol.K) |
| B. | kcal/(K.mol) |
| C. | m3atm/(K.mol) |
| D. | amu.m2s2/K |
| Answer» E. | |
| 5. |
An isentropic flow at section x has a velocity of 200 m/s and static enthalpy of 360 kJ/kg. Determine the flow velocity at a location y where the static enthalpy is half the value at x. |
| A. | 447.2 m/s |
| B. | 385.9 m/s |
| C. | 515.4 m/s |
| D. | 408.2 m/s |
| Answer» B. 385.9 m/s | |
| 6. |
For an isentropic flow along a nozzle, at location A, the static temperature and pressure were measured to be 320 K and 5 bar. What will be the static pressure at the location where the static temperature is 500 K? (Given η = 1.4) |
| A. | 23.8 bar |
| B. | 32.4 bar |
| C. | 12.4 bar |
| D. | 7.4 bar |
| Answer» B. 32.4 bar | |
| 7. |
For an incompressible subsonic flow over a nozzle, at a typical location A along the nozzle, the diameter of the cross-section was found to be 30 cm. What will be the diameter of the cross section at a point B where the flow velocity was determined to be twice the value at A? |
| A. | 21.21 cm |
| B. | 42.42 cm |
| C. | 15 cm |
| D. | 60 cm |
| Answer» B. 42.42 cm | |
| 8. |
Find the stagnation enthalpy of a calorically perfect gas having a flow velocity of 94 m/s and static temperature of 315 K. (Cp=1005 J/kg/K) |
| A. | 321 kJ/kg |
| B. | 234 kJ/kg |
| C. | 456 kJ/kg |
| D. | 543 kJ/kg |
| Answer» B. 234 kJ/kg | |
| 9. |
In which of the following cases can enthalpy be expressed as a function of constant Cp and absolute temperature T? |
| A. | Ideal gas |
| B. | Calorically perfect gas |
| C. | Real gas |
| D. | Thermally perfect gas |
| Answer» C. Real gas | |
| 10. |
Which of the following comprises of internal thermal energy and flow work? |
| A. | Entropy |
| B. | Enthalpy |
| C. | Kinetic energy |
| D. | Potential energy |
| Answer» C. Kinetic energy | |