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How to Use Wind Energy to Power Your House


Quiz Questions

1. Wind is created by the unequal heat-ing of the Earth’s surface by the sun. Wind turbines convert the kinetic energy in wind into mechanical power that runs a generator to produce clean electricity. Today’s turbines are versatile modular sources of electricity. Their blades are aero-dynamically designed to capture the maximum energy from the wind. The wind turns the blades, which spin a shaft connected to a generator that makes electricity.
True
False
2. A small wind energy system can provide with a practical and economical source of electricity if
The property has a good wind resource
The home or business is located on at least one acre of land in a rural area
All of the above
None of the above
3. The size of the wind turbine depends on the application, small turbines range in size from ______________________.
20 watts to 100 kilowatts
20 kilowatts to 100 kilowatts
4. ______________________ turbines can be used in applications such as pumping water.
1kW – 10kW
10kW – 100kW
5. Most turbines have automatic over speed-governing systems to keep the rotor from spinning out of control in very high winds. This information, along with the local wind speed and the energy budget, will help in deciding which size turbine will best meet your electricity needs.
True
False
6. Tilt-down towers can be lowered to the ground during hazardous weather such as hurricanes. Aluminum towers are prone to cracking and should be avoided
True
False
7. Stand-alone systems (systems not connected to the utility grid) require batteries to store excess power generated for use when the wind is calm. They also need a charge controller to keep the batteries from overcharging.
True
False
8. The formula for calculating the power from a wind turbine is:
Power = k Cp 1/2 ρ A V3
What does Cp denote?
Minimum power coefficient
Maximum power coefficient
9. Flagging the effect of strong winds on area vegetation does not help in determining the area wind speeds.
True
False
10. A grid connected wind turbine can reduce your consumption of utility supplied electricity for lighting, appliances, and electric heat.
True
False
11. Hybrid wind energy systems can provide reliable off grid power for homes, farms, or even entire communities that are far from the nearest utility lines.
True
False
12. ________________is a device used to measure the wind speed.
Anemometer
Grid

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