Harnessing the Wind and Sun

What is the primary benefit of using solar panels for energy production?

• They produce greenhouse gases.

• They require a lot of maintenance.

• They provide a renewable source of energy.

• They work effectively in all weather conditions.

Which part of a wind turbine captures the kinetic energy of the wind?

• The tower

• The blades

• The nacelle

• The foundation

What is the most common material used for constructing modern wind turbine blades?

• Steel

• Aluminum

• Fiberglass

• Wood

What is the term for the maximum efficiency that a wind turbine can achieve according to the Betz limit?

• 50%

• 59.3%

• 75%

• 100%

How does the angle of solar panels affect their energy production?

• It has no effect.

• The angle can increase or decrease production depending on the sun's position.

• A steeper angle always increases production.

• A flatter angle always increases production.

What is the purpose of a wind turbine's yaw system?

• To adjust the blade angle for optimal efficiency.

• To convert kinetic energy into electrical energy.

• To orient the turbine towards the wind.

• To support the structure of the turbine.

Which of the following is NOT a type of solar panel technology?

• Monocrystalline silicon

• Polycrystalline silicon

• Cadmium telluride

• Beryllium oxide

What is the effect of increasing the length of wind turbine blades?

• It decreases the turbine's efficiency.

• It has no effect on the turbine's performance.

• It increases the area swept by the blades, potentially capturing more energy.

• It makes the turbine more likely to fail.

What is a common method to store solar energy for use when the sun is not shining?

• Flywheels

• Lithium-ion batteries

• Compressed air

• All of the above

What is the term for the speed at which the wind turbine blades start to generate power?

• Cut-in speed

• Rated speed

• Cut-out speed

• Maximum speed