WorksheetsEGR 240 Final Exam Part 1
Total questions: 47
Worksheet time: 28mins
Which natural isotope of uranium is easy to split and so is made concentrated (fuel is enriched) for nuclear reactors?
U-92
U-235
U-236
U-238
Which item below is a form of light water reactor that keeps the reactor cooling water within the reactor containment area, using a second water loop to carry steam to the turbines?
RMBK Soviet reactor
PWR (Pressurized Water Reactor)
BWR (Boiling Water Reactor)
CANDU Reactor (Canada Deuterium Uranium Reactor)
France is the country with the highest percentage of their electricity from nuclear power. What was a primary reason mentioned that initially made France pursue nuclear power so heavily?
France was one of the first countries to develop nuclear power for military and commercial purposes
France has a large supply of naturally occurring uranium
France pursued nuclear power in order to reduce its carbon dioxide output because of concerns of global warming
France had its oil imports cut off in the 1970’s and so decided to pursue nuclear power to prevent such risk to its energy supply in the future
Which type of nuclear reaction is currently used for nuclear electricity generation?
Nuclear Fission
Nuclear Fusion
Both Nuclear Fission and Nuclear Fusion
Neither Nuclear Fusion nor Nuclear Fission
Which of the following countries was mentioned as expanding its nuclear electricity generation?
USA
Germany
China
Japan
Which of the following statements are true? (Choose all that are true)
The primary source of wind energy is from thermal energy from the sun.
The primary driver of wind energy is from the earth's rotation.
Wind blows from high pressure areas to low pressure areas
Wind blows from low pressure to high pressure
Low pressure is caused by warmer temperatures
Which country was the largest producer of electricity from wind (2021 data), accounting for 35% of the world total generation from wind?
United Kingdom
Germany
China
India
US
Which country has the most wind generation as a fraction of total electricity generation?
Germany
Denmark
Ireland
USA
China
Which US state has the most wind generation? (It would be fourth in the world if it were its Iowaown country.)
Lowa
Massachusetts
Texas
North Dakota
California
What does the term "curtailment" mean?
Curtailment refers to the preferred shape of the wind turbine blade
Curtailment is shutting down the wind turbine because it is putting out more power than can be either used or transmitted
Curtailment is the reduction in wind velocity due to interference with trees, buildings, and landforms
"Curtailment" is the name of an anti-wind protest group in Massachusetts
Which of these is closest to the average capacity factor for wind turbines on land?
10%
35%
50%
75%
90%
Which country leads the world in hydropower generation?
USA
Brazil
China
Egypt
Canada
What is special about pumped storage hydropower?
Pumped storage hydropower can act like a battery for storing excess energy.
Pumped storage hydropower uses run-of-river flow, so there is less environmental damage.
Pumped storage hydropower is an experimental method depending on perpetual motion efficiency for endless power.
Pumped storage hydropower uses special pumps to pump fish between the lower water source to the higher water source.
Which of the below answers is the largest hydroelectric facility in the world, by generation power?
Three Gorges Dam
Hoover Dam
Grand Inga Dam
Grand Coulee Dam
Baihatu Dam
The Itaipu Dam is located in or near which country below? Choose the best answer.
China
Egypt
Russia
Brazil
Canada
The video lists several different electricity generation sources that are considered "clean" energy, meaning that they don't produce CO2 during generation. Which electricity generation source below was listed as having the world's largest share of generation among all "clean" energy generation sources?
Nuclear
Hydroelectric
Solar
Wind
Coal
Which of the following are potential negative consequences of conventional storage hydroelectric facilities, as discussed in the video? Choose all that apply that were mentioned in the video.
Displacement of people
Loss of animal habitat
Wildfires
Earthquakes
Hurricanes
Which of the following energy sources are initially from the sun's energy? (choose all that apply).
coal
concentrating solar thermal power
photovoltaic
hydroelectric
wind
Roughly what percentage of the sun's energy hitting the earth ends up hitting the earth's surface?
roughly 40%
roughly 50%
roughly 60%
roughly 75%
How does the power from the sun to the earth compare to the average power use by current civilization?
Total power from the sun is comparable to about 50% of the world’s average power use by civilization.
Total power from the sun is comparable to about 5 times the world’s average power use by civilization.
Total power from the sun is comparable to about 50 times the world’s average power use by civilization.
Total power from the sun is comparable to about 5000 times the world’s average power use by civilization.
What is an advantage of Concentrating Solar Thermal Power (CSP) for electricity generation? (Select all that apply.)
Suitable on hazy days
Suitable for small-scale installations, like residential solar
Allows storage of heat for power generation after the sun goes down
Uses thermal power generation that allows substitution of other sources of heat when the sun isn't shining
Which items below affect the solar insolation of a location? (Select all that apply.)
clouds or haze
altitude
longitude
latitude
"In order to try to discourage the adoption of AC, and thus to promote his DC power instead, what did Thomas Edison do? (Select all that apply, as discussed in the movie.)"
Electrocute a circus elephant with AC.
Picket the Westinghouse company
Claim that AC currents cause cancer
Promote the development of the electric chair with AC power for execution of criminals
Promote the use of DC power for medical purposes such as the relief of back pain
There are two frequencies commonly used for electric power grids in the world. What are they? (select the correct two from the list below.)
10 Hz
50 Hz
60 Hz
110 Hz
140 Hz
How is electric power defined?
P = V * I
P = V * L
P = V / I
P = 2 V * I
"Several countries are considering using HVDC to transmit power long distances. Which countries were mentioned in this presentation, regarding the use of HVDC? (Choose all that apply) "
Iceland
Germany
USA
Saudi Arabia
Mexico
"Which statement below is true, regarding power transmission and distribution? (choose all that apply)"
Power transmission system and distribution system are different terms for the same thing.
Power transmission uses higher voltages than distribution systems.
Power transmission systems carry power from the power plant to towns and cities.
Power transmission systems carry power within neighborhoods in towns and cities.
[Supergrids video] What are super-grids as discussed in the video?
A grid that transmits power across long distances (even between countries) to maximize the use of renewable energy from wherever it is produced.
A new way to connect homes to power sources.
A grid that operates only using solar power.
A new information technology to replace the internet.
[Supergrids video] What technology is being recognized as the leading way to achieve long distance electrical transmission?
High Voltage Direct Current (HVDC)
Green Current
Low Voltage Direct Current (LVDC)
Alternating Current
[Supergrids video] Which region of the world was mentioned as already having extensive interconnections between power grids of different countries?
Europe
North America
Asia
Africa
Pacific Islands
[Supergrids video] In the example in the video of the US, what was the biggest challenge in building long distance transmission?
Materials shortages
Government regulation
Politics between states
Lack of renewable power to transmit
Negotiating with landowners
[Supergrids video] In the proposed Asia Super Grid project, what area is mentioned that is rich in solar and wind renewable energy and has potential of 2.6TW of power that could be shared across Asia? (It was noted for comparison that this is more than twice the 1.17 TW power capacity of the US.)
India
Vietnam
Mongolia
South Korea
Japan
[Supergrids video] What is the biggest obstacle that is being faced in the development of an Asia Super Grid?
Lack of renewable energy to transmit
Negotiating with landowners
Politics and mistrust between countries
Government regulation
Materials shortage
[DW Planet A video] The video uses an example of a specific day (January 15 2023) in Germany to illustrate what it claims is one of the biggest challenges of our moving to more renewable energy use. What is the major challenge that is being considered in this specific example?
The difficulty of generating wind energy in high-speed winds.
The difficulty in shutting down nuclear power plants or coal power plants that were already built.
The difficulty in transmission of renewable energy from where it is available to where it is needed.
Environmental activists opposing windfarms and solar farms.
A shortage of critical materials due to the war in Ukraine.
[DW Planet A video] The video claims that there are several important ways to make our power grids more flexible for renewables. What are some specific ways mentioned? Select all that apply based on the content of the video.
Store excess energy as renewable hydrogen fuel to use when needed
Build more energy storage like batteries or pumped storage to supply energy when it is needed over shorter periods
More power transmission capacity to transport energy from where it is produced to where it needed.
Import more natural gas from Russia and other countries.
Time our energy use (demand) based on available renewable energy supply
[WSJ -- video on extreme weather and power grid] The video looks at some impacts of extreme weather on the power grid, such as hurricanes, heat, and drought. (There are several other impacts not covered in the video, such as from extreme cold weather, ice storms, and others.) What were some impacts of heat waves mentioned in the video? Select all answers discussed in the video.
Difficulty in oil drilling and pumping
High power demand from air conditioners
Power substations shutting down when overheating
Freezing pipes
[WSJ -- video on extreme weather and power grid] As discussed in the video, what was mentioned as an effect of extreme drought on the power grid?
Impacts natural gas flows
Reduces hydropower generation
Reduces biofuel crop production
Damages foundations of wind turbines
Makes mining coal more difficult
Approximately how much of total world energy use goes towards transportation?
15%
45%
25%
35%
What currently is the largest energy source for transportation?
Natural Gas
Biofuels
Electricity
Petroleum
Why does a hybrid electric vehicle (HEV) have less carbon emissions than a similar-sized regular gas vehicle?
Hybrid electric vehicles use a different kind of gasoline
Hybrid electric vehicles use less gasoline
Hybrid electric vehicles don't use gasoline.
Hybrid electric vehicles convert gasoline directly into electricity, so they don't require combustion engines
Which two countries are the largest producers of ethanol biofuels, together accounting for approximately 75% of the world production? Choose two countries from the list below.
Argentina
Brazil
United States
China
Russia
The video listed some advantages of hydrogen as a transportation fuel. Which of the following was listed as an advantage?
Hydrogen fuel is already available in California
Hydrogen has high energy density vs batteries
Hydrogen is expensive
Hydrogen has low energy density vs batteries
Select the items below that are true statements. (Select all that are true.)
Energy efficiency means less "service" for the same energy.
Energy efficiency means less energy for the same "service".
Energy efficiency and energy conservation always mean the same thing.
Energy conservation could mean buying LED light bulbs.
Energy conservation could mean biking instead of driving.
From the video, what was a renovation listed that provided energy efficiency improvements for the Empire State Building?
Replacing all windows
Installing low flush toilets
Replacing exterior brick
Changing the energy company providing electricity
Energy savings measures in the US have the potential for how much energy savings by 2030?
About 40 quads, or about 40 percent.
About 20 quads, or about 20 percent.
About 15 quads, or about 15 percent.
About 30 quads, or about 30 percent
What are ways in which energy savings can be encouraged? (Check all that apply.)
Educate people on energy choices
Reduce the cost of efficiency improvements
Outlaw inefficient technologies
Raise the cost of energy (intentionally or not)
Inform people of what other people are doing (social methods)
The rebound effect (also called Jevons Paradox) states what?
Energy efficiency improvement costs will fall when they are widely adopted.
Energy conservation is easier than energy efficiency improvements.
The energy efficiency gains become more difficult in more affluent societies.
Energy efficient technologies can actually lead to more total energy use.
