Wind Turbine Test

Front

What is the mass per unit volume of Earth's atmosphere and is a useful value in aeronautics and other sciences?

Back

Air density

Front

What is the area in square feet of the rotor? It is also called the capture area.

Back

Swept area

Front

What converts the turning motion of a wind turbine's blades into electricity?

Back

Generator

Front

At very high wind speeds, typically between 45 and 80mph, most wind turbines cease power generation and shut down. This wind speed is known as what?

Back

Cut-out speed

Front

What part of a wind turbine raises the wind turbine so that its blades safely clear the ground and allows it to reach stronger winds at higher elevations?

Back

Tower

Front

What is the part of the wind turbine that collects energy from the wind? It usually consists of two or more wooden, fiberglass, or metal blades that rotate about an axis.

Back

Rotor

Front

What is the ratio of the rotational speed of the blade to the wind speed? The larger this ratio, the faster the rotation of the wind turbine rotor and a given speed.

Back

Tip speed ratio

Front

The swept area of a wind turbine is:

Back

the circle formed by the rotating blades of the rotor.

Front

What energy value might one expect for a cubic meter of air moving at 10m/s after flowing through a mechanical device, such as a wind turbine? Options: 0 J, 30 J, 60 J, 120 J

Back

30 J

Front

Albert Betz determine the maximum efficiency for wind turbine blades in 1919. What is this value?

Back

59.3%.