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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