MCQOPTIONS
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MCQOPTIONS
This section includes 13 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 the coefficient of lift for an inviscid flow is over a flat plate as obtained from Newtonian theory? |
| A. | cd = 2sin3α |
| B. | cd = 2sin2α |
| C. | cd = 2sin2αcosα |
| D. | cd = sin2αcosα |
| Answer» D. cd = sin2αcosα | |
| 2. |
What is the coefficient of pressure over the surface which is in shadow (no impact from the flow present)? |
| A. | Zero |
| B. | 1 |
| C. | 2 |
| D. | Infinite |
| Answer» B. 1 | |
| 3. |
In which direction does the streamline move downstream the shockwave in a hypersonic flow over a wedge? |
| A. | Straight line |
| B. | Parallel to the surface |
| C. | No fixed direction |
| D. | Perpendicular to the surface |
| Answer» C. No fixed direction | |
| 4. |
The fluid flow in Newtonian theory is modelled as which of the following? |
| A. | Stream of particles in rectilinear motion |
| B. | Wave |
| C. | Stream of particles in conic section |
| D. | Particles moving in a random direction |
| Answer» B. Wave | |
| 5. |
For which of these conditions was Newtonian law devised? |
| A. | Force on a flat plate in hypersonic flow |
| B. | Force on inclined plane in moving fluid |
| C. | Force on curved airfoil in moving fluid |
| D. | Force on flat plate in subsonic flow |
| Answer» C. Force on curved airfoil in moving fluid | |
| 6. |
What is modified Newtonian pressure law? |
| A. | Cp = Cp max sin2 θ |
| B. | Cp = Cp max sin θ |
| C. | Cp = Cp max cos2 θ |
| D. | Cp = Cp max cos θ |
| Answer» B. Cp = Cp max sin θ | |
| 7. |
What is the value of Cp at stagnation point for a hypersonic body? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | Infinite |
| Answer» D. Infinite | |
| 8. |
For which angle θ (between tangential pressure and freestream) does maximum coefficient of pressure exist for a blunt body? |
| A. | θ = 0 |
| B. | θ = π |
| C. | θ = π/2 |
| D. | θ = 2π |
| Answer» D. θ = 2π | |
| 9. |
What is the density behind the shock in hypersonic flow? |
| A. | Zero |
| B. | Infinite |
| C. | \( \frac {γ + 1}{γ – 1}\) |
| D. | \( \frac {γ – 1}{γ + 1}\) |
| Answer» C. \( \frac {γ + 1}{γ – 1}\) | |
| 10. |
Which of these equations is Newton’s sine – squared law? |
| A. | Cp = 2sin2 θ |
| B. | Cp = sin2 θ |
| C. | Cp = \( \frac {sin^2 θ}{2}\) |
| D. | Cp = \( \frac {sin^2 θ}{4}\) |
| Answer» B. Cp = sin2 θ | |
| 11. |
Newtonian theory is more accurate for two – dimensional bodies than three – dimensional bodies. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
What are the limiting conditions for Newtonian theory? |
| A. | M∞ → ∞ |
| B. | γ → ∞ |
| C. | M∞ → ∞, γ → 1 |
| D. | M∞ → 1, γ → ∞ |
| Answer» D. M∞ → 1, γ → ∞ | |
| 13. |
What is the use of Newtonian theory? |
| A. | Get pressure distribution over hypersonic body |
| B. | Get pressure distribution over supersonic body |
| C. | Get coefficient of drag over hypersonic body |
| D. | Get coefficient of lift over hypersonic body |
| Answer» B. Get pressure distribution over supersonic body | |