Question 1

Mixing ethanol with gasoline makes the gasoline burn cleaner and is now required by most states.

Accepted Answer

A) True 
 B)False  True

Question 2

A(n) __________________ is used to remove hydrogen from various fuels to be used in fuel cells.

Accepted Answer

A)  Transformer 
B)  Electrolyte 
C)  Reformer 
D)  Catalyst 
E)  Cathode 
A)  Transformer 
B)  Electrolyte 
C)  Reformer 
D)  Catalyst 
E)  Cathode C

Question 3

Since the 1920s, hydropower production has

Accepted Answer

A)  Risen, but not as fast as fossil fuel use 
B)  Fallen due to disinterest 
C)  Fallen due to a lack of available sites 
D)  Become our most important energy source 
E)  Stayed at about the same level 
A)  Risen, but not as fast as fossil fuel use 
B)  Fallen due to disinterest 
C)  Fallen due to a lack of available sites 
D)  Become our most important energy source 
E)  Stayed at about the same level A

Question 4

____________ is being used to produce ethanol and lessen the dependance on oil.

Accepted Answer

A)  Palm oil 
B)  Corn 
C)  Miscanthus grass 
D)  Soybeans 
E)  All of the above are being grown for ethanol production. 
A)  Palm oil 
B)  Corn 
C)  Miscanthus grass 
D)  Soybeans 
E)  All of the above are being grown for ethanol production.

Question 5

Describe the best energy source option(s) for a rural area in a tropical developing country with no coastal access. Be sure you support why this is the best energy source for the area.

Accepted Answer

Solar energy would be the best option fo

Question 6

Low-head hydropower involves ___________ dams on ___________ rivers.

Accepted Answer

A)  Large; major 
B)  Small; minor 
C)  Large; minor 
D)  Small; major 
E)  Medium-sized; minor 
A)  Large; major 
B)  Small; minor 
C)  Large; minor 
D)  Small; major 
E)  Medium-sized; minor

Question 7

Wood and charcoal burning is still the main energy source for about 30 percent of the world's population.

Accepted Answer

A) True 
 B)False

Question 8

Home appliances in standby mode can account for up to 25 percent of a monthly electric bill.

Accepted Answer

A) True 
 B)False

Question 9

Manure or dung makes a good fuel except that it is

Accepted Answer

A)  Scarce 
B)  Not clean 
C)  Needed to rebuild the soil 
D)  Difficult to burn 
E)  Commonly full of pathogens 
A)  Scarce 
B)  Not clean 
C)  Needed to rebuild the soil 
D)  Difficult to burn 
E)  Commonly full of pathogens

Question 10

Parabolic mirrors ________ sunlight on a collecting medium.

Accepted Answer

A)  selectively focus the brightest 
B)  selectively reflect the brightest 
C)  deflect the most 
D)  diffuse intense 
E)  focus intense 
A)  selectively focus the brightest 
B)  selectively reflect the brightest 
C)  deflect the most 
D)  diffuse intense 
E)  focus intense

Question 11

Cogeneration refers to

Accepted Answer

A)  production of both electricity and usable steam or hot water by the same facility. 
B)  cooperative efforts between power producers and consumers aimed at sharing profits from energy sales. 
C)  sale of electrical power by consumers back to the electrical grid. 
D)  the production of electricity using several different fuel sources at a single facility. 
A)  production of both electricity and usable steam or hot water by the same facility. 
B)  cooperative efforts between power producers and consumers aimed at sharing profits from energy sales. 
C)  sale of electrical power by consumers back to the electrical grid. 
D)  the production of electricity using several different fuel sources at a single facility.

Question 12

A system of pipes painted black that have water circulating on the wall in a glass greenhouse on the south side of a building is an example of

Accepted Answer

A)  Parabolic collection 
B)  An active solar heating system 
C)  Passive heat absorption 
D)  Cogeneration 
E)  Charging fuel cells to increase efficiency in energy use 
A)  Parabolic collection 
B)  An active solar heating system 
C)  Passive heat absorption 
D)  Cogeneration 
E)  Charging fuel cells to increase efficiency in energy use

Question 13

Photovoltaic cells work because solar energy striking their surface

Accepted Answer

A)  Causes the cells to liquefy as they heat 
B)  Releases electrons, causing an electric potential in attached wires 
C)  Is collected in the form of photons and sent through attached wires 
D)  Causes an uneven magnetic charge to develop 
E)  Changes to chemical energy 
A)  Causes the cells to liquefy as they heat 
B)  Releases electrons, causing an electric potential in attached wires 
C)  Is collected in the form of photons and sent through attached wires 
D)  Causes an uneven magnetic charge to develop 
E)  Changes to chemical energy

Question 14

Which of the following is true regarding fuel cell technology?

Accepted Answer

A)  They were first designed by NASA. 
B)  They must be recharged with an electrical current. 
C)  They are only about 40-45% efficient. 
D)  They must receive a constant supply of water and oxygen. 
E)  A fuel cell stack providing all of the electricity for a typical home is not feasible because it would be too large. 
A)  They were first designed by NASA. 
B)  They must be recharged with an electrical current. 
C)  They are only about 40-45% efficient. 
D)  They must receive a constant supply of water and oxygen. 
E)  A fuel cell stack providing all of the electricity for a typical home is not feasible because it would be too large.

Question 15

Burning methane from dung

Accepted Answer

A)  Is more efficient than burning the dung directly 
B)  Provides more heat than burning the dung directly 
C)  Allows the dung to also be used as a fertilizer 
D)  Is more efficient than burning the dung directly and it allows the dung to also be used as a fertilizer 
E)  All of these are correct 
A)  Is more efficient than burning the dung directly 
B)  Provides more heat than burning the dung directly 
C)  Allows the dung to also be used as a fertilizer 
D)  Is more efficient than burning the dung directly and it allows the dung to also be used as a fertilizer 
E)  All of these are correct

Question 16

Evaluate the use of biomass, hydropower, wind, and geothermal energy as potential large scale energy sources. In your evaluation provide the pros and cons and the context for which each energy source would best work.

Accepted Answer

Biomass, hydropower, wind, and geotherma

Question 17

The most effective technology developed so far to produce solar energy concentrated enough to run an industrial furnace or turbine is to use rev: 06_16_2014_QC_50439

Accepted Answer

A)  Parabolic mirrors 
B)  Cogeneration 
C)  Passive heat absorption 
D)  Photovoltaic cells 
E)  Smart meters 
A)  Parabolic mirrors 
B)  Cogeneration 
C)  Passive heat absorption 
D)  Photovoltaic cells 
E)  Smart meters

Question 18

Capturing waste heat in a thermal-electric plant can increase efficiency from 30 percent to 80 or 90 percent.

Accepted Answer

A) True 
 B)False

Question 19

Passive heat absorption refers to

Accepted Answer

A)  the cooling of solar panels used to generate electricity. 
B)  using natural materials to gather and hold heat. 
C)  using water to cool nuclear power plants. 
A)  the cooling of solar panels used to generate electricity. 
B)  using natural materials to gather and hold heat. 
C)  using water to cool nuclear power plants.

Question 20

A glass greenhouse on the south side of a building is an example of

Accepted Answer

A)  Parabolic collection 
B)  An active solar heating system 
C)  Passive heat absorption 
D)  Cogeneration 
E)  Charging fuel cells to increase efficiency in energy use 
A)  Parabolic collection 
B)  An active solar heating system 
C)  Passive heat absorption 
D)  Cogeneration 
E)  Charging fuel cells to increase efficiency in energy use

Exam 20: Sustainable Energy

Mixing ethanol with gasoline makes the gasoline burn cleaner and is now required by most states.

A(n) __________________ is used to remove hydrogen from various fuels to be used in fuel cells.

Since the 1920s, hydropower production has

____________ is being used to produce ethanol and lessen the dependance on oil.

Describe the best energy source option(s) for a rural area in a tropical developing country with no coastal access. Be sure you support why this is the best energy source for the area.

Low-head hydropower involves ___________ dams on ___________ rivers.

Wood and charcoal burning is still the main energy source for about 30 percent of the world's population.

Home appliances in standby mode can account for up to 25 percent of a monthly electric bill.

Manure or dung makes a good fuel except that it is

Parabolic mirrors ________ sunlight on a collecting medium.

Cogeneration refers to

A system of pipes painted black that have water circulating on the wall in a glass greenhouse on the south side of a building is an example of

Photovoltaic cells work because solar energy striking their surface

Which of the following is true regarding fuel cell technology?

Burning methane from dung

Evaluate the use of biomass, hydropower, wind, and geothermal energy as potential large scale energy sources. In your evaluation provide the pros and cons and the context for which each energy source would best work.

The most effective technology developed so far to produce solar energy concentrated enough to run an industrial furnace or turbine is to use rev: 06_16_2014_QC_50439

Capturing waste heat in a thermal-electric plant can increase efficiency from 30 percent to 80 or 90 percent.

Passive heat absorption refers to

A glass greenhouse on the south side of a building is an example of

Understanding Our Environment

Principles of Science and Systems

Matter, Energy, and Life

Evolution, Biological Communities, and Species Interactions

Biomes: Global Patterns of Life

Population Biology

Human Populations

Environmental Health and Toxicology

Food and Hunger

Farming: Conventional and Sustainable Practices

Biodiversity: Preserving Species

Biodiversity: Preserving Landscapes

Restoration Ecology

Geology and Earth Resources

Climate Change

Air Pollution

Water Use and Management

Water Pollution

Conventional Energy

Solid, Toxic, and Hazardous Waste

Urbanization and Sustainable Cities

Ecological Economics

Environmental Policy, Law, and Planning

What Then Shall We Do

Filters

Low-head hydropower involves _ dams on _ rivers.