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Aerodynamics
Aerodynamics Written Test
Quiz 1
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Q.1
The induced angle of attack for an elliptical lift distribution increase when ______
a) Lift decreased
b) Aspect ratio decreased
c) Decrease in planform area
d) Increase in span length
Q.2
For a finite wing, induced drag increases with an increase in aspect ratio.
a) False
b) True
Q.3
The incorrect statement for a finite wing with elliptical lift distribution out of the following is_____
a) Induced drag coefficient ∝ coefficient of lift
b) Induced drag coefficient increases rapidly with lift
c) Induced drag coefficient is around 25%
d) To reduce induced drag, we want wing with the lowest aspect ratio
Q.4
For an elliptical lift distribution, the planform area is also elliptical for a wing.
a) True
b) False
Q.5
The incorrect choice for the general lift distribution for a finite wing is ________
a) Circulation is assumed a Fourier series
b) 0 ≤ θ ≤ 2π
c) Coordinate transformation is for spanwise direction to θ
d) Coefficient of lift depends on aspect ratio directly
Q.6
The elliptical lift distribution has a major interest in making wings because_____
a) Minimum induced drag
b) e = 0
c) δ = 1
d) Aspect ratio lowest
Q.7
Tapered wings are used more rather than elliptical wing planforms practically. The reason being______
a) Easy to manufacture than elliptic wings
b) Aspect ratio more important for low induced drag
c) Tapered wing resembles elliptic wing highly
d) Tapered wing is another name for elliptic wing
Q.8
The incorrect difference between airfoil and wings is_______
a) Presence of induced drag in wings
b) Different effective angles of attack seen by
c) Difference in the lift-curve slope
d) Lift slope of the wing is higher than of airfoil
Q.9
For very high aspect ratio wings, the lift curve slope resembles that of the airfoil.
a) False
b) True
Q.10
For a finite wing and an infinite wing (airfoil), zero lift angle of attack is zero.
b) False
a) True
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