The Vortex Filament, the Biot-Savart Law, Helmholtz Theorem MCQ

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• The lift distribution goes to zero at the tips for the finite wings.
  ক

  False

  খ

  True

  গ

  Only true for elliptical wings

  ঘ

  Only true for rectangular wing
• Having a different zero angle of attack along span-wise locations is termed as______
  ক

  Washout

  খ

  Geometric twist

  গ

  Aerodynamic twist

  ঘ

  Washin
• If the geometric angle of attack is higher at the tip than the root, it is called as ______
  ক

  Washout

  খ

  Geometric twist

  গ

  Aerodynamic twist

  ঘ

  Washin
• A condition in which the wing has different values of α along the span is called as ______
  ক

  Washout

  খ

  Geometric twist

  গ

  Aerodynamic twist

  ঘ

  Washin
• The incorrect statement regarding Helmholtz theorems is____
  ক

  Valid for all inviscid flows

  খ

  Γ remains constant along vortex filament

  গ

  Describes vortex behavior

  ঘ

  Vortex filament forms a closed loop or extends till the boundaries of the fluid
• Select the incorrect statement regarding the terminology used in the study of incompressible flow over finite wings.
  ক

  Induced drag is finite

  খ

  Circulation is constant

  গ

  Downwash is absent

  ঘ

  Vorticity induces velocity
• Biot-Savart law can be used to describe inviscid, incompressible flows.
  ক

  True

  খ

  False
• Which is the incorrect analogyout of the following regarding Biot-Savart law?
  ক

  Induced velocity: Magnetic induction

  খ

  Vortex Filament: Current-carrying Wire

  গ

  Vorticity: Velocity

  ঘ

  Aerodynamics: Electromagnetism
• A curved vortex filament does not exist.
  ক

  True

  খ

  False
• In Biot-Savart law, the circulation taken about any path enclosing the vortex filament is____
  ক

  Constant

  খ

  Depends on the local strength

  গ

  Zero

  ঘ

  Path-dependent