Question 1

Describe the opportunities and challenges associated with wind power.

Accepted Answer

Wind power is a renewable energy source....

Question 2

Select the example of a drawback of wind power.

Accepted Answer

A)   Turbines must always run at maximum capacity regardless of wind speed.
B)   The reliance on steam requires a supply of water for cooling the turbines.
C)   Even sites with strong, steady winds cannot produce electricity efficiently.
D)   The large, spinning blades of wind turbines kill wildlife, such as birds.E) A) and B)
F) A) and C)

Question 3

Which statement correctly describes ethanol?

Accepted Answer

A)   Ethanol is a type of biofuel made of alcohol produced by fermenting plant sugars.
B)   Most gasoline in the United States now contains a blend of at least 85%ethanol.
C)   Less than 10%of the corn grown in the United States is used for ethanol production.
D)   All of these are correct.E) None of the above
F) B) and D)

Question 4

Which of these features is true of both solar and wind power?

Accepted Answer

A)   intermittent power source that requires a backup energy source
B)   produces no greenhouse gas emissions during normal operation
C)   supplies a small fraction of global energy demand, but is increasing rapidly
D)   All of these are correct.E) C) and D)
F) A) and D)

Question 5

Which energy source accounts for nearly 7% of global energy consumption, making it the leading fossil fuel alternative?

Accepted Answer

A)   nuclear power
B)   wind
C)   solar
D)   hydropowerE) B) and C)
F) A) and D)

Question 6

Which action helps to conserve energy?

Accepted Answer

A)   switching to higher-voltage transmission systems for electricity distribution
B)   unplugging home electronics when the devices are not in use
C)   reducing the rolling resistance of tires by properly inflating them
D)   All of these are correct.E) A) and C)
F) A) and B)

Question 7

Which statement correctly describes the current alternatives to fossil fuel energy?

Accepted Answer

A)   Alternatives to fossil fuels supply less than one-fifth of global energy demand.
B)   The most rapidly growing alternatives to fossil fuels are hydroelectric and nuclear power.
C)   Wind and solar power together provide the majority of non-fossil fuel energy.
D)   All of these are correct.E) A) and D)
F) A) and C)

Question 8

Fuel-cell vehicles emit

Accepted Answer

A)   water.
B)   oxygen.
C)   hydrogen.
D)   carbon dioxide.E) B) and C)
F) B) and D)

Question 9

Select an advantage of running electric vehicles with hydrogen fuel cells instead of rechargeable batteries.

Accepted Answer

A)   Refueling a hydrogen fuel-cell vehicle is much quicker than recharging vehicle batteries.
B)   A distribution network already exists for hydrogen refueling, but not for recharging stations.
C)   Hydrogen fuel cells only emit water, whereas battery operation produces greenhouse gases.
D)   All of these are correct.E) All of the above
F) A) and B)

Question 10

Select the MOST likely negative environmental impact of self-driving cars.

Accepted Answer

A)   Driverless vehicles may require heavier-weight materials to withstand accidents.
B)   Self-driving vehicles may become a substitute for public transportation.
C)   The operation of autonomous vehicles may decrease the demand for ethanol.
D)   Self-driving vehicles in a sharing service may increase the number of miles traveled.E) None of the above
F) A) and D)

Question 11

Which technology is currently the MOST common for large-scale energy storage?

Accepted Answer

A)   pumping water uphill to a reservoir when energy is plentiful, then allowing water to run downhill through hydropower turbines to generate electricity when energy is scarce
B)   pumping compressed air into underground caverns when energy is plentiful, then releasing air to turn a turbine to generate electricity when energy is needed
C)   heating salt to temperatures in excess of 1,000 °\degree° F when energy is plentiful, then using this hot salt to heat water for a steam turbine to make electricity when energy is scarce
D)   charging batteries with electricity that is produced from wind turbines and rooftop solar panels, then consuming the battery power when the Sun sets and the wind stops blowing E) A) and B)
F) B) and C)

Question 12

In wind power, the capacity for electricity production changes according to the time of day, weather conditions, and other factors. This challenge of wind power is called

Accepted Answer

A)   wind farming.
B)   cogenerating.
C)   variable generation.
D)   turbine inefficiency.E) B) and D)
F) C) and D)

Question 13

Outline the various ways that government actions in the United States are encouraging the development, production, and consumption of alternative energy.

Accepted Answer

In the United States, government actions...

Question 14

A 	is a fuel source that uses recently living matter or by-products of their decomposition as an energy source.

Accepted Answer

A)   fossil fuel
B)   biofuel
C)   fuel cell
D)   heat pumpE) A) and D)
F) B) and C)

Question 15

How does a fuel cell create an electric charge?

Accepted Answer

A)   by splitting water into hydrogen and oxygen molecules
B)   by splitting the nucleus of an atom with a neutron
C)   by stripping electrons from hydrogen molecules
D)   by stripping electrons from specially treated siliconE) None of the above
F) All of the above

Question 16

How are nuclear power plants similar to coal power plants?

Accepted Answer

A)   Both types of power plants release energy by splitting the nuclei of atoms.
B)   Both types of power plants generate significant carbon dioxide emissions.
C)   Both types of power plants use steam to turn turbines that generate electricity.
D)   Both types of power plants create a similar volume of overall waste.E) C) and D)
F) A) and D)

Question 17

Select the technology that creates electricity from flowing air.

Accepted Answer

A)   photovoltaic panel
B)   wind turbine
C)   fuel cell
D)   heliostatE) B) and C)
F) C) and D)

Question 18

A concentrated solar thermal plant

Accepted Answer

A)   uses mirrors to focus sunlight on a receiver containing a fluid that is used to generate steam.
B)   contains an array of photovoltaic cells that produces an electric current with sun exposure.
C)   stores energy that is generated by solar panels for use after the Sun becomes unavailable.
D)   generates hot water by circulating fluid through tubes that connect a roof and a water heater.E) B) and D)
F) C) and D)

Question 19

Which technology produces electricity directly with exposure to sunlight?

Accepted Answer

A)   concentrated solar thermal plant
B)   photovoltaic solar panel
C)   rooftop solar collector
D)   All of these are correct.E) B) and C)
F) A) and D)

Exam 14: Energy Alternatives: How Are Our Energy Decisions Changing

Which action helps to conserve energy?

Correct Answer
verified

Which technology is currently the MOST common for large-scale energy storage?

Correct Answer
verified

Which of these features is true of both solar and wind power?

Correct Answer
verified

Select the MOST likely negative environmental impact of self-driving cars.

Correct Answer
verified

How does a fuel cell create an electric charge?

Correct Answer
verified

Select the technology that creates electricity from flowing air.

Correct Answer
verified

Which energy source accounts for nearly 7% of global energy consumption, making it the leading fossil fuel alternative?

Correct Answer
verified

Which statement correctly describes the current alternatives to fossil fuel energy?

Correct Answer
verified

A is a fuel source that uses recently living matter or by-products of their decomposition as an energy source.

Correct Answer
verified

Outline the various ways that government actions in the United States are encouraging the development, production, and consumption of alternative energy.

Correct Answer
verified
In the United States, government actions...
View Answer

Fuel-cell vehicles emit

Correct Answer
verified

In wind power, the capacity for electricity production changes according to the time of day, weather conditions, and other factors. This challenge of wind power is called

Correct Answer
verified

Describe the opportunities and challenges associated with wind power.

Correct Answer
verified
Wind power is a renewable energy source....
View Answer

Select the example of a drawback of wind power.

Correct Answer
verified

Which technology produces electricity directly with exposure to sunlight?

Correct Answer
verified

How are nuclear power plants similar to coal power plants?

Correct Answer
verified

Which statement correctly describes ethanol?

Correct Answer
verified

Select an advantage of running electric vehicles with hydrogen fuel cells instead of rechargeable batteries.

Correct Answer
verified

A concentrated solar thermal plant

Correct Answer
verified

Exam 14: Energy Alternatives: How Are Our Energy Decisions Changing

Which action helps to conserve energy?

Correct AnswerverifiedShow Answer

Which technology is currently the MOST common for large-scale energy storage?

Correct AnswerverifiedShow Answer

Which of these features is true of both solar and wind power?

Correct AnswerverifiedShow Answer

Select the MOST likely negative environmental impact of self-driving cars.

Correct AnswerverifiedShow Answer

How does a fuel cell create an electric charge?

Correct AnswerverifiedShow Answer

Select the technology that creates electricity from flowing air.

Correct AnswerverifiedShow Answer

Which energy source accounts for nearly 7% of global energy consumption, making it the leading fossil fuel alternative?

Correct AnswerverifiedShow Answer

Which statement correctly describes the current alternatives to fossil fuel energy?

Correct AnswerverifiedShow Answer

A is a fuel source that uses recently living matter or by-products of their decomposition as an energy source.

Correct AnswerverifiedShow Answer

Outline the various ways that government actions in the United States are encouraging the development, production, and consumption of alternative energy.

Correct AnswerverifiedIn the United States, government actions...View AnswerShow Answer

Fuel-cell vehicles emit

Correct AnswerverifiedShow Answer

In wind power, the capacity for electricity production changes according to the time of day, weather conditions, and other factors. This challenge of wind power is called

Correct AnswerverifiedShow Answer

Describe the opportunities and challenges associated with wind power.

Correct AnswerverifiedWind power is a renewable energy source....View AnswerShow Answer

Select the example of a drawback of wind power.

Correct AnswerverifiedShow Answer

Which technology produces electricity directly with exposure to sunlight?

Correct AnswerverifiedShow Answer

How are nuclear power plants similar to coal power plants?

Correct AnswerverifiedShow Answer

Which statement correctly describes ethanol?

Correct AnswerverifiedShow Answer

Select an advantage of running electric vehicles with hydrogen fuel cells instead of rechargeable batteries.

Correct AnswerverifiedShow Answer

A concentrated solar thermal plant

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
In the United States, government actions...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Wind power is a renewable energy source....
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified