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Gas Dynamic Lab: 04: Select the correct answer for the following questions. 1. Lift is the component of this force that is ... (a) parallel, (b) with angle, (c) perpendicular to the oncoming flow direction.

Gas Dynamic Lab: 04: Select the correct answer for the following questions. 1. Lift is the component of this force that is ... (a) parallel, (b) with angle, (c) perpendicular to the oncoming flow direction.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Gas Dynamic Lab: 04: Select the correct answer for the following questions. 1. Lift is the component of this force that is .. to the oncoming flow direction. (a) parallel, (b) with angle, (c) perpendicular 2. Does lift and drag of an airfoil depend on angle of attack? (a) True (b) False 3. Is airfoil shape similar to blades of the propeller? (a) True (b) False 4. Is airfoil can be characterized by the relation between the angle of attack, lift coefficient and drag coefficient? (a) True (b) False 5. The symbol means in the figure. (a) lift force (b) drag force (c) normal force Angle of attack 6. For a wing of aspect ratio AR, having an elliptical lift distribution, the induced drag coefficient is (where CL is the lift coefficient) (a) nAR (b) TAR (c) 2TAR (d) TAR2 7. Laminar flow airfoil is used to reduce the (a) pressure drag (b) induced drag (c) skin friction drag (d) wave drag 8. Set the aerofoil your chosen angle of incidence is · gives a good installed pressure distribution. (a) twelve degree (b) ten degree (c) eight degree 9. The critical Mach number for a thick airfoil will be (a) lesser than a thin airfoil. (b) greater than a thin airfoil. (c) equal to a thin airfoil. (d) cannot be related to thin airfoil 10. What is the dimension for Lift coefficient? (a) N/s (b) kg/N (c) Dimensionless
Transcribed Image Text:Gas Dynamic Lab: 04: Select the correct answer for the following questions. 1. Lift is the component of this force that is .. to the oncoming flow direction. (a) parallel, (b) with angle, (c) perpendicular 2. Does lift and drag of an airfoil depend on angle of attack? (a) True (b) False 3. Is airfoil shape similar to blades of the propeller? (a) True (b) False 4. Is airfoil can be characterized by the relation between the angle of attack, lift coefficient and drag coefficient? (a) True (b) False 5. The symbol means in the figure. (a) lift force (b) drag force (c) normal force Angle of attack 6. For a wing of aspect ratio AR, having an elliptical lift distribution, the induced drag coefficient is (where CL is the lift coefficient) (a) nAR (b) TAR (c) 2TAR (d) TAR2 7. Laminar flow airfoil is used to reduce the (a) pressure drag (b) induced drag (c) skin friction drag (d) wave drag 8. Set the aerofoil your chosen angle of incidence is · gives a good installed pressure distribution. (a) twelve degree (b) ten degree (c) eight degree 9. The critical Mach number for a thick airfoil will be (a) lesser than a thin airfoil. (b) greater than a thin airfoil. (c) equal to a thin airfoil. (d) cannot be related to thin airfoil 10. What is the dimension for Lift coefficient? (a) N/s (b) kg/N (c) Dimensionless
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