MCQOPTIONS
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MCQOPTIONS
This section includes 9 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 causes thrust of an engine? |
| A. | Change in momentum |
| B. | Difference in lift distribution |
| C. | Difference in drag distribution |
| D. | Mass flow entering the engine |
| Answer» B. Difference in lift distribution | |
| 2. |
What happens to the integral dS when the area of exhaust is less than the area of inlet? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Infinity |
| Answer» C. Zero | |
| 3. |
Integral form of momentum equation cannot replace the need for theoretical and experimental measurements. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The integral form of the conservative equation is used for computing thrust of an engine. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
What is the thrust of an engine if the inlet and exhaust mass flow rate are 150 kg/s and 190 kg/s respectively with the pressure difference between the exhaust and ambient air is 1.85 104? The exhaust area is 2m2, the ambient and exhaust velocities are 280 m/s and 400 m/s. |
| A. | 50 kN |
| B. | 62 kN |
| C. | 71 kN |
| D. | 84 kN |
| Answer» D. 84 kN | |
| 6. |
What is the static thrust for an engine as derived from the integral momentum equation? |
| A. | T = ( dot {m} )u<sub>e</sub> + A<sub>e</sub>(p<sub>e</sub> p<sub>0</sub>) |
| B. | T = ( dot {m} )A<sub>e</sub>(p<sub>e</sub> p<sub>0</sub>) |
| C. | T = A<sub>e</sub>(p<sub>e</sub> p<sub>0</sub>) |
| D. | T = ( dot {m} )A<sub>e</sub> |
| Answer» B. T = ( dot {m} )A<sub>e</sub>(p<sub>e</sub> p<sub>0</sub>) | |
| 7. |
What is the formula for net thrust of the engine? |
| A. | F = -&Conint;pdS |
| B. | F = &Conint;pdS |
| C. | F = -&Conint; ( frac {dS}{p} ) |
| D. | F = -&Conint;p<sup>2</sup> dS |
| Answer» B. F = &Conint;pdS | |
| 8. |
Thrust produced by engine is due to the shear stress distribution from the fluid. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
What forces are exerted on the body by a fluid flow? |
| A. | Pressure force |
| B. | Shear stress |
| C. | Pressure and shear stress |
| D. | Lift force |
| Answer» D. Lift force | |