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Aircraft Design Practice Test: Aerodynamics
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Aerodynamics topics include: Aerodynamic forces and coefficients, aerodynamics lift, parasite drag and drag due to lift. Aerodynamics is the study of how objects move through the air, especially when affected by a solid object. The word comes from the Greek words aerios, which means "concerning the air", and dynamis, which means "force".  Aerodynamics is a key area of study in aeronautics and involves topics from fluid dynamics and gas dynamics. It affects anything that moves through the air, including rockets, kites, and cars.  The four forces of flight are lift, weight, thrust, and drag.... Show more
Aircraft Design Practice Test: Aerodynamics
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25 Questions

1. Equivalent skin friction coefficient can be used to provide initial estimation of the parasite drag.
2. If static air pressure is 0.5 bar and dynamic pressure is 0.85 bar then, find total pressure acting on a body.
3. _______ is one of the sources of drag.
4. Consider equivalent skin friction coefficient as 0.0025 and Swet/Sref = 0.6. Evaluate parasite drag.
5. Consider an incompressible flow. If static pressure increases then, the local freestream velocity __________
6. What is interference drag?
7. Wave drag is produced due to ________
8. For a symmetrical airfoil drag coefficient at zero lift is 0.05 and induced drag coefficient is 0.0025. Find the total drag coefficient.
9. If an aircraft is operating with dynamic pressure of the free stream q=20Pa and has area of wing is 10m2 then evaluate drag experience by the aircraft. Given drag coefficient is 0.9.
10. Drag which is produced due to lift is called?
11. The location of separation point will depend on ________
12. Which of the following is a method for estimating the potato drag?
13. Determine the value of form factor for fuselage if fuselage fineness ratio f is 1.2.
14. A subsonic aircraft has unswept wing which has maximum lift coefficient of 1.4. Now, consider wing is provided sweep of 25° at quarter chord point. Now, determine the change in maximum lift coefficient due to the provision of sweep.
15. A 2D airfoil is operating at 0.6M. Find the approximate value of lift curve slope in per rad.
16. The change in local air flow velocity will produce small change in skin friction drag.
17. How do you define the lift coefficient?
18. A wing is designed to operate with free stream velocity of 20m/s and air density of 1.225 kg/m3. Find aerodynamic efficiency of given wing. Consider S as 8 m2, CL as 0.9 and CD as 1.25.
19. If an aircraft as pitching moment of 10 Nm and dynamic pitching moment is about 8.25Nm. Find the moment coefficient Cm.
20. Which of the following is correct?
21. Which of the following is correct for nacelle form factor (FF)?
22. If an airfoil is designed to provide lift curve slope as 7.8, then find airfoil efficiency. The actual lift curve slope of the airfoil is 7.4.
23. For ideal flow, total pressure along streamline will be _________
24. Increment in the skin friction drag due to prop-wash is called _________
25. Induced drag of the airfoil is _____