Wind Energy MCQ Questions and Answers Quiz

11. How many offshore wind farms are there in the U.S.?

  1. 1
  2. 2
  3. 3
  4. 4

12. Low solidity rotors use which of the following force for rotation

  1. Drag
  2. Lift
  3. Centrifugal
  4. Centripetal

13. Roughly how tall are most utility-scale wind turbine towers in the U.S.?

  1. 65 meters (213 feet)
  2. 114 meters (374 feet)
  3. 88 meters (289 feet)
  4. 140 meters (460 feet)

14. The amount of energy available in the wind at any instant is proportional to...............of the wind speed

  1. Square root power of two
  2. Square root power of three
  3. Square power
  4. Cube power

15. The atmosphere with uniform wind speed is called the..............atmosphere

  1. Plain
  2. Surface
  3. Free
  4. Shear

16. The following is the tangential velocity of the blade due to the rotation of blade

  1. Wind velocity
  2. Incident wind velocity
  3. Blade linear velocity
  4. Relative velocity

17. The rate of change of wind speed with height is called

  1. Wind shear
  2. Wind rose
  3. Wind solidity
  4. None of the above

18. The wind intensity can be described by

  1. Reynolds number
  2. Mach number
  3. Beaufort number
  4. Froude number

19. The wind speed is measured using an instrument called

  1. Pyranometer
  2. Manometer
  3. Anemometer
  4. Wind vane

20. Turbines blades have..............type cross section to extract energy from wind

  1. Aerofoil
  2. Elliptical
  3. Rectangular
  4. All of the above
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