Q. _______ light is used to denote dangers of birds, bats or/and airplanes.

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Q. Which of the following is a mechanical application of wind energy?

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Q. Which of the following is a potential application of wind energy?

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Q. Does flying a kite use wind energy?

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Q. What are the two primary aerodynamic forces acting on wind turbine rotors?

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Q. Lift is an aerodynamic force acting _______

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Q. Drag is an aerodynamic force acting ______

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Q. What is an aerodynamic force?

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Q. What happens on the upwind side of the wind mill blade?

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Q. The upwind side experiences a force that slows the blade.

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Q. What is lift-to-drag ratio?

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Q. A higher lift-to-drag ratio indicates a higher efficiency.

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Q. Turbine blades use a/an _______ design.

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Q. Which of the following is the governing equation for power extraction and calculation? Note that all the quantities on the right side of equation denotes a vector quantity.

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Q. Why is it necessary to have an optimal tip speed ratio (TSR)?

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Q. What is tip speed ratio (TSR)?

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Q. What does tip speed ratio (TSR) depend on?

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Q. Which of the following blade designs is becoming less popular?

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Q. The airfoil/curve blade designs are affected by drag along its length.

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Q. How is drag force experienced by the blade reduced in various modern blade designs?

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