Unit 6 Review

Which of the following statements is true?

• If efficiency is improved energy is conserved.
• If conservation happens energy must be used more efficiently.
• Both statements are true.
• Neither statement is true.

An ad campaign asks people to turn off lights when not using them. Is this an example of conserving energy or improving energy efficiency?

• Conserving Energy
• Energy Efficiency

Depending on where you look, there are 3 - 5 countries in the world that get 100 percent of their electricity from renewable resources. Which of the following was one of these?

• China
• Iceland
• India
• Kenya
• Lebanon

A city is planning on new regulations to improve conservation of energy. Which of the energy consuming sectors would probably be the first sector the city focuses on in order to maximize conservation?

• Commercial
• Electric Power
• Industrial
• Residential
• Transportation

Most thermal power plants are about 35 percent efficient. Which of the following statements is correct?

• If 100 units of energy go into the plant, 65 units are lost as one form of energy is converted to other forms. The remaining 35 units of energy leave the plant to do usable work.
• If 100 units of energy go into the plant, 35 units are lost as one form of energy is converted to other forms. The remaining 65 units of energy leave the plant to do usable work.

Which of the following statements is true about wind turbines?

• A 100 percent efficient wind turbine will never be possible.
• As technology improves, a 100 percent efficient wind turbine could be possible.

How many large electric grids are currently connected in the United States?

• 1
• 3
• 5
• 7

Which nonrenewable energy resource accounted for the largest percentage of U.S. Electricity Production in 2021?

• Coal
• Natural Gas
• Petroleum
• Propane
• Uranium

Which renewable energy resource accounted for the largest percentage of U.S. Electricity Production in 2021?

• Biomass
• Geothermal
• Hydropower
• Solar
• Wind

Between 12:00 p.m. and 6:00 p.m., electricity use is at its highest, requiring power companies to run additional generators. What is this called?