MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Aerodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the relation between back pressure and exit pressure in case of subsonic flow at the nizzle’s exit? |
| A. | pB = pe |
| B. | pB > pe |
| C. | pB < pe |
| D. | pB = 2pe |
| Answer» B. pB > pe | |
| 2. |
Which of these conditions is not applicable for choked flow? |
| A. | The Mach number at the throat is zero |
| B. | Mass flow is constant |
| C. | Exit pressure is lower than inlet pressure |
| D. | Exit pressure is same as the inlet pressure |
| Answer» E. | |
| 3. |
In case of flow inside a nozzle, how should the exit pressure be in relation to the inlet pressure? |
| A. | Exit pressure = Inlet pressure |
| B. | Exit pressure > Inlet pressure |
| C. | Exit pressure < Inlet pressure |
| D. | There is no relation between the two pressures |
| Answer» D. There is no relation between the two pressures | |
| 4. |
The area – Mach number relation yields how many solutions for a given Mach number? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 0 |
| Answer» B. 4 | |
| 5. |
What is the differential form of energy equation for quasi one – dimensional flow? |
| A. | dh – u2du = 0 |
| B. | dh – udu = 0 |
| C. | dh + u2du = 0 |
| D. | dh + udu = 0 |
| Answer» E. | |
| 6. |
State true or false. Divergent – convergent nozzles are used to achieve supersonic flow. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What happens to the velocity of the supersonic flow in the divergent duct? |
| A. | Decreases |
| B. | Increases |
| C. | Remains the same |
| D. | Changes periodically |
| Answer» C. Remains the same | |
| 8. |
For which of these flows do we need a convergent duct to increase the velocity of the flow? |
| A. | Subsonic flow |
| B. | Supersonic flow |
| C. | Hypersonic flow |
| D. | Sonic flow |
| Answer» B. Supersonic flow | |
| 9. |
What is the differential form of momentum equation for the quasi one – dimensional flow known as? |
| A. | Froude equation |
| B. | Euler’s equation |
| C. | Kelvin’s equation |
| D. | Bernoulli’s equation |
| Answer» C. Kelvin’s equation | |
| 10. |
Which is the Euler’s equation for the quasi – one dimensional flow? |
| A. | dp = \(\frac {ρ}{u}\)du |
| B. | dp = – \(\frac {u}{ρ}\)du |
| C. | dp = – ρudu |
| D. | dp = ρudu |
| Answer» E. | |
| 11. |
What is the momentum equation for a quasi – one dimensional flow? |
| A. | p1A1 + ρ1u\(_1 ^2\)A1 + \(\int _{A_1} ^{A_2}\)pdA = p2A2 + ρ2u\(_2 ^2\)A2 |
| B. | p1A1u1 + ρ1u\(_1 ^2\)A1 + \(\int _{A_1} ^{A_2}\)pdA = p2A2u2 + ρ2u\(_2 ^2\)A2 |
| C. | p1A1 + ρ1u\(_1 ^2\)A1 = p2A2 + ρ2u\(_2 ^2\)A2 |
| D. | p1A1u1 + ρ1u\(_1 ^2\)A1 = p2A2u2 + ρ2u\(_2 ^2\)A2 |
| Answer» B. p1A1u1 + ρ1u\(_1 ^2\)A1 + \(\int _{A_1} ^{A_2}\)pdA = p2A2u2 + ρ2u\(_2 ^2\)A2 | |
| 12. |
Which of these parameters in quasi – one dimensional flow varies w.r.t. x as opposed to the one – dimensional flow? |
| A. | Cross – sectional area |
| B. | Pressure |
| C. | Density |
| D. | Temperature |
| Answer» B. Pressure | |