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Wind Energy Quiz 9 (25 MCQs)

Quiz Instructions:

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1. Select the wrong statement of DOUBLE ACTING PUMP
2. Tidal changes come how many times a day?
3. The cross section of most wind turbine blades are shaped like:
4. What gas is the primary cause of global climate change?
5. The main material that is used in the production of photovoltaic cells is _____
6. People used wind energy to propel boats across the Nile as early as:
7. Which country is currently not a leader in wind technology?
8. What is the force that propels an object upward, or at a right angle to the direction of the air stream?
9. What scale ranks winds from 0-12
10. How fast can a wind turbines blade move
11. Which of the following is an example of mechanical advantage?
12. What continent did windmills spread through in the 12th century AD.?
13. Pro of wind energy
14. Are wind turbines a clean energy source?
15. To move the windmill blades, the blades must be set at an angle so the _____ is greater than the _____
16. What part of a wind turbine makes the wind energy into electric energy?
17. If an electric heater supplies 200 joules of heat energy to a cup of water, but only 150 joules is actually absorbed by the water, the remainder is 'wasted' by heating the cup and the room, the percentage energy efficiency of this process is said to be:
18. The equation P =$^{1}$/$_{2}$ A p v$^{3}$ is a calculation of maximum power input and not real power input because _____
19. What is the best definition of a generator?
20. Which country is the world's largest producer for wind energy?
21. Why is wind turbine designed to stop operation at cut out velocity?
22. Which is a disadvantage of hydropower?
23. In a windmill blade, lift is
24. What do wind turbines, hydro electric dams, and ethanol plants have in common
25. What energy creates the most air pollution?
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