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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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