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Green Energy for a Sustainable Future

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1

……... is the tangential velocity of the blade due to the rotation of the blade.

Wind velocity
Incident wind velocity
Blade linear velocity
Relative velocity

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2

The approximate diameter of wind turbine blades is……..

320 feet
220 feet
80 feet
500 feet

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3

Which instrument is used to measure the speed of the wind?

Pyranometer
Manometer
Anemometer
Wind vane

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4

Which country created the first windmills?

Egypt
Mongolia
Iran
Japan

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5

A Nacelle in a windmill house contains?

Gearbox
Brakes
Generator
All of the above

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6

Which of the following is NOT an example of distributed wind generation?

A 50-kilowatt turbine at an office building
A large, 100-megawatt wind farm
A 1.5-megawatt turbine at a university campus
A small, 5-kilowatt turbine at home

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7

What is the rate of change of wind speed with height called?

Wind shear
Wind rose
Wind solidity
None of the above

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8

What type of cross-section does turbine blades have to extract energy from wind?

Aerofoil
Elliptical
Rectangular
All of the above

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9

What is the term to describe the atmosphere with uniform wind speed?

Plain
Surface
Free
Shear

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10

What is the range of speed in a wind turbine that generates electricity?

100 – 125 mph
450 – 650 mph
250 – 450 mph
30-35 mph

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