EVR 1001 EXAM 5 UPDATED ACTUAL
Questions And CORRECT Answers
Photovoltaic technology is best described as ________. - CORRECT ANSWERS using sunlight to
directly generate electricity
Ultimately, all biofuels are ________, because they are the product of ________. - CORRECT
ANSWERS solar; photosynthesis
________ strongly influences the amount of energy generated from hydropower. - CORRECT
ANSWERS The volume of water released and the height of the fall
All of the following are drawbacks of corn-based ethanol production, EXCEPT: - CORRECT
ANSWERS the inability to store the product.
Passive solar energy collection includes which of the following technologies? - CORRECT
ANSWERS buildings designed and building materials chosen to maximize their direct absorption
of sunlight
What is the ultimate source for geothermal energy? - CORRECT ANSWERS the radioactive decay
of elements deep within Earth
Based on the yearly average values, calculate one person's residential electricity needs for a year. -
CORRECT ANSWERS 4,440 kWh per year
Based on the yearly average values, calculate the solar radiation per square meter for one year. -
CORRECT ANSWERS 1,560 kWh per year
Assume that photovoltaic conversion of solar energy has 10% efficiency. Calculate how many square
meters of photovoltaic cells would be needed to supply one person's electricity for the year, based on the
yearly average values. - CORRECT ANSWERS 28.5 m2
,If efficiency of photovoltaic cells improves to 40%, how many square meters of photovoltaic cells would
be needed for one person's yearly electricity use? - CORRECT ANSWERS 7.12 m2
Commercially available household photovoltaic systems cost approximately $20,000. The average cost of
electricity in the United States is approximately $0.09 per kilowatt hour. At these prices how long would
it take for the photovoltaic system to generate $20,000 of electricity? Assume the system will produce
enough kilowatt hours for a four-person household in Topeka, Kansas. - CORRECT
ANSWERS 12.5 years
A potential energy source from oceans is ________. - CORRECT ANSWERS ocean thermal energy
How much uranium oxide did the United States produce in 2005? - CORRECT ANSWERS 5
million pounds
In what year did uranium oxide production peak in the United States? - CORRECT
ANSWERS 1980
What was the net amount of uranium imported into the United States in 2005? - CORRECT
ANSWERS 45 million pounds
Describe the trends in uranium oxide domestic production from the peak production year to 2005. -
CORRECT ANSWERS Domestic production declined dramatically.
If current trends continue, the United States is likely to - CORRECT ANSWERS decrease domestic
production and increase imports and exports.
Worldwide, the most widely used renewable energy resource is ________. - CORRECT
ANSWERS bioenergy
What is the process behind tidal energy? - CORRECT ANSWERS the difference between high and
low tides
, A major advantage of solar power is that ________. - CORRECT ANSWERS solar systems
provide local, decentralized control over power
Which of the following is one of the three current major drawbacks of solar energy? - CORRECT
ANSWERS This resource is intermittent in nature.
Which of the following are documented negative impacts of dams? - CORRECT
ANSWERS flooding, habitat destruction, alteration of river sediment deposition
What is the basis for the use of hydrogen fuel cells? - CORRECT ANSWERS It is extremely
energy-efficient.
The form of energy delivered to an electrical generating turbine in a geothermal facility is in the form of
________. - CORRECT ANSWERS hot water or steam
Bagasse- and sugarcane-based ethanol are major items in the energy resources of ________. - CORRECT
ANSWERS Brazil
Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on
________. - CORRECT ANSWERS the source of energy used to produce the hydrogen
Recently, how has Germany reduced its dependence on fossil fuels? - CORRECT ANSWERS by
utilizing the feed-in tariff system
What is the greatest limitation for the use of geothermal power? - CORRECT ANSWERS It is
restricted to regions where we can tap energy from naturally heated groundwater.
Of the following renewable energy resources, which one has the highest life-cycle greenhouse gas
emissions? - CORRECT ANSWERS Biomass
Questions And CORRECT Answers
Photovoltaic technology is best described as ________. - CORRECT ANSWERS using sunlight to
directly generate electricity
Ultimately, all biofuels are ________, because they are the product of ________. - CORRECT
ANSWERS solar; photosynthesis
________ strongly influences the amount of energy generated from hydropower. - CORRECT
ANSWERS The volume of water released and the height of the fall
All of the following are drawbacks of corn-based ethanol production, EXCEPT: - CORRECT
ANSWERS the inability to store the product.
Passive solar energy collection includes which of the following technologies? - CORRECT
ANSWERS buildings designed and building materials chosen to maximize their direct absorption
of sunlight
What is the ultimate source for geothermal energy? - CORRECT ANSWERS the radioactive decay
of elements deep within Earth
Based on the yearly average values, calculate one person's residential electricity needs for a year. -
CORRECT ANSWERS 4,440 kWh per year
Based on the yearly average values, calculate the solar radiation per square meter for one year. -
CORRECT ANSWERS 1,560 kWh per year
Assume that photovoltaic conversion of solar energy has 10% efficiency. Calculate how many square
meters of photovoltaic cells would be needed to supply one person's electricity for the year, based on the
yearly average values. - CORRECT ANSWERS 28.5 m2
,If efficiency of photovoltaic cells improves to 40%, how many square meters of photovoltaic cells would
be needed for one person's yearly electricity use? - CORRECT ANSWERS 7.12 m2
Commercially available household photovoltaic systems cost approximately $20,000. The average cost of
electricity in the United States is approximately $0.09 per kilowatt hour. At these prices how long would
it take for the photovoltaic system to generate $20,000 of electricity? Assume the system will produce
enough kilowatt hours for a four-person household in Topeka, Kansas. - CORRECT
ANSWERS 12.5 years
A potential energy source from oceans is ________. - CORRECT ANSWERS ocean thermal energy
How much uranium oxide did the United States produce in 2005? - CORRECT ANSWERS 5
million pounds
In what year did uranium oxide production peak in the United States? - CORRECT
ANSWERS 1980
What was the net amount of uranium imported into the United States in 2005? - CORRECT
ANSWERS 45 million pounds
Describe the trends in uranium oxide domestic production from the peak production year to 2005. -
CORRECT ANSWERS Domestic production declined dramatically.
If current trends continue, the United States is likely to - CORRECT ANSWERS decrease domestic
production and increase imports and exports.
Worldwide, the most widely used renewable energy resource is ________. - CORRECT
ANSWERS bioenergy
What is the process behind tidal energy? - CORRECT ANSWERS the difference between high and
low tides
, A major advantage of solar power is that ________. - CORRECT ANSWERS solar systems
provide local, decentralized control over power
Which of the following is one of the three current major drawbacks of solar energy? - CORRECT
ANSWERS This resource is intermittent in nature.
Which of the following are documented negative impacts of dams? - CORRECT
ANSWERS flooding, habitat destruction, alteration of river sediment deposition
What is the basis for the use of hydrogen fuel cells? - CORRECT ANSWERS It is extremely
energy-efficient.
The form of energy delivered to an electrical generating turbine in a geothermal facility is in the form of
________. - CORRECT ANSWERS hot water or steam
Bagasse- and sugarcane-based ethanol are major items in the energy resources of ________. - CORRECT
ANSWERS Brazil
Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on
________. - CORRECT ANSWERS the source of energy used to produce the hydrogen
Recently, how has Germany reduced its dependence on fossil fuels? - CORRECT ANSWERS by
utilizing the feed-in tariff system
What is the greatest limitation for the use of geothermal power? - CORRECT ANSWERS It is
restricted to regions where we can tap energy from naturally heated groundwater.
Of the following renewable energy resources, which one has the highest life-cycle greenhouse gas
emissions? - CORRECT ANSWERS Biomass
