Question 1

The idea of cogeneration is to actively use ________ electricity generating plants.

Accepted Answer

A)  Solar as well as coal energy to produce electricity at
B)  Warm water as well as steam to produce electricity at
C)  Two kinds of fuel (e.g., coal and oil)  at
D)  Both electricity and waste steam heat from
E)  Two different types of thermal conversion machines for increased efficiency at D

Question 2

Siltation and decreased water quality are especially significant problems with

Accepted Answer

A)  Micro-hydro dams
B)  Mini-hydro dams
C)  Huge dams on major rivers
D)  Low-head hydropower technology
E)  All of these equally

Question 3

Where does wind energy have the greatest potential to create electricity?

Accepted Answer

A)  the great plains and southeastern US
B)  shorelines and in valleys
C)  the great plains, shore lines, and mountain tops
D)  mountain tops and valleys

Question 4

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

Question 5

Jatropha is a good source for biodiesel because

Accepted Answer

A)  It's nuts have a high energy content
B)  It grows in most climate zones
C)  It will grow in sun or shade
D)  It's leaves are easily combustible
E)  It is readily available worldwide

Question 6

Very few living trees are cut down for fuel in ______________ because twigs, branches, and crop residues are used for fuel.However, in ________ the forests are nearly gone and even fruit trees are cut for fuel.

Accepted Answer

A)  Pakistan; India
B)  Pakistan; Haiti
C)  Haiti; Pakistan
D)  India; Haiti
E)  Haiti; China

Question 7

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.

Question 8

Most of North America's wind potential is located offshore.

Accepted Answer

A) True 
 B)False

Question 9

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

Question 10

Which of the following solar energy uses has been used by people for thousands of years?

Accepted Answer

A)  Parabolic solar collection
B)  Active solar heating system
C)  Passive heat absorption
D)  Cogeneration
E)  All of these are correct.

Question 11

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 E

Question 12

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

Accepted Answer

A) True 
 B)False  True

Question 13

____________ 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.

Question 14

Photovoltaic electricity costs are __________ coal or nuclear-powered electricity.

Accepted Answer

A)  substantially less than
B)  unlikely to become as cheap as
C)  incomparably more expensive than
D)  likely to be cheaper in the near future than
E)  the same as

Question 15

In the United States and Canada, the MOST common problem with using wood as a major heat source is

Accepted Answer

A)  The cost
B)  Wood shortages
C)  That it separates people from the utility grid
D)  The production of pollutants
E)  None of these is correct

Question 16

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

Question 17

Active solar energy systems involve

Accepted Answer

A)  Large volumes of massive heat absorbers
B)  Pumps and moving fluids
C)  Photovoltaic cells
D)  Cogeneration
E)  Stationary materials to gather and hold heat

Question 18

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

Question 19

A drawback of lead-acid batteries being used to store large amounts of energy is

Accepted Answer

A)   They can store only moderate amounts of energy per unit mass.
B)   The acid is corrosive.
C)   They require an operating temperature of almost 600o F.
D)   They can store only moderate amounts of energy per unit mass and the acid is corrosive.
E)   They can store only moderate amounts of energy per unit mass, the acid is corrosive, and they require an operating temperature of almost 600o F.

Question 20

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...

Exam 20: Sustainable Energy

The idea of cogeneration is to actively use ________ electricity generating plants.

Correct AnswerverifiedD

Siltation and decreased water quality are especially significant problems with

Correct AnswerverifiedShow Answer

Where does wind energy have the greatest potential to create electricity?

Correct AnswerverifiedShow Answer

Low-head hydropower involves ___________ dams on ___________ rivers.

Correct AnswerverifiedShow Answer

Jatropha is a good source for biodiesel because

Correct AnswerverifiedShow Answer

Very few living trees are cut down for fuel in ______________ because twigs, branches, and crop residues are used for fuel.However, in ________ the forests are nearly gone and even fruit trees are cut for fuel.

Correct AnswerverifiedShow Answer

Which of the following is true regarding fuel cell technology?

Correct AnswerverifiedShow Answer

Most of North America's wind potential is located offshore.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following solar energy uses has been used by people for thousands of years?

Correct AnswerverifiedShow Answer

Parabolic mirrors ________ sunlight on a collecting medium.

Correct AnswerverifiedE

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

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

Photovoltaic electricity costs are __________ coal or nuclear-powered electricity.

Correct AnswerverifiedShow Answer

In the United States and Canada, the MOST common problem with using wood as a major heat source is

Correct AnswerverifiedShow Answer

Burning methane from dung

Correct AnswerverifiedShow Answer

Active solar energy systems involve

Correct AnswerverifiedShow Answer

Manure or dung makes a good fuel except that it is

Correct AnswerverifiedShow Answer

A drawback of lead-acid batteries being used to store large amounts of energy is

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedSolar energy would be the best option fo...View AnswerShow Answer

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D

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Low-head hydropower involves _ dams on _ rivers.

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Very few living trees are cut down for fuel in ______ because twigs, branches, and crop residues are used for fuel.However, in the forests are nearly gone and even fruit trees are cut for fuel.

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E

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True

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Solar energy would be the best option fo...
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