Small Wind Electric Systems

Quiz Question

1. Small wind electric system will work for you if: ______________________.
There is enough wind where you live
Tall towers are allowed in your neighborhood or rural area
You have enough space
All of the above
2. Wind energy systems are one of the most cost-effective home-based renewable energy systems
3. A typical home approximately uses _____________ of electricity per year
20,000 kilowatt-hours (kWh)
10,000 kilowatt-hours (kWh)
30,000 kilowatt-hours (kWh)
40,000 kilowatt-hours (kWh)
4. “Flagging” has been used to estimate the
average wind speed for an area
total wind speed for an area
both a & B
None of the above
5. Airport wind data are generally measured at heights about
10-33 ft (3-10 m) above ground
40-66 ft (12-20m) above ground
20-33 ft (6-10 m) above ground
None of the above
6. In much of the United States, wind speeds are _____________ in the summer when the sun shines brightest and longest.
None of the above
7. The formula for calculating the power from a wind turbine is: ____________ . Where, Power output is in kilowatts , Cp = Maximum power coefficient, ρ = Air density, lb/ft3 ,A = Rotor swept area, ft2 V = Wind speed -mph ,k = 0.000133, A constant to yield power in kilowatts.
Power = k Cp ρ A V3
Power = k Cp 1/2 ρ A V3
Power = k Cp 1/4 ρ A V3
Power = k Cp / ρ A V3
8. AEO Stands for _________________.
Actual energy output
Annual energy output
Average energy output
None of the above
9. The ratings for wind turbines are based on standard conditions of ____ F (15° C) at sea level.
10. Small wind energy systems can be connected to the electricity distribution system.