Quizz WPP

What is the main function of wind turbines?

• Generate electricity from wind energy

• Pump water from underground

• Heat up the atmosphere

• Create artificial rain

What is the purpose of the blades in a wind turbine?

• To provide shade for animals

• To attract birds

• To make loud noises

• To turn and generate electricity

Why is a gearbox used in wind turbines?

• To slow down the rotation

• To increase the rotation speed

• To make the blades colorful

• To play music

What is the function of the brake in a wind turbine?

• To stop blade rotation during strong winds

• To cool down the generator

• To increase blade rotation speed

• To generate extra electricity

How does a wind turbine align itself with the wind direction?

• By randomly changing direction

• By spinning in circles

• Using yaw motors controlled by an electronic controller

• By following the sun's position

What is the maximum efficiency limit a wind turbine can achieve according to Betz's limit?

• 50 percent

• 59.3 percent

• 100 percent

• 75 percent

What happens to the downstream wind speed after passing through a wind turbine?

• It remains the same

• It disappears completely

• It increases

• It decreases

What is the purpose of the blade tilting mechanism in a wind turbine?

• To align the blades with the relative wind flow

• To make the blades shorter

• To increase noise levels

• To confuse birds

What is the main reason for using airfoil technology in wind turbine blades?

• To produce lift force and turn the blade

• To create decorative patterns

• To reduce visibility of the blades

• To attract tourists

Why is it physically impossible for the downstream wind speed to be zero?

• Because of magnetic interference

• Because of the Earth's rotation

• Because it would mean the flow is stuck

• Because the wind turbine absorbs energy