9 Practice Test
The average home in Fremont uses ten 100-watt lightbulbs for five hours newer day. Approximately how many kilowatt hours of electrical energy are consumed in one year by using the lightbulbs?
1,825
The half-life of radon gas is approximately 4 days. 4 weeks after the introduction of radon into a sealed room, the fraction of the original amount remaining is closest to
1/128
Which of the following is the best example of cogeneration?
A coal-fired plant captures waste heat and uses it to heat adjacent buildings
Which of the following is a keystone species?
African elephant
Many power companies utilize strategies to modify consumer demand for energy and peak demand. Which of the following would accomplish this goal?
Allow customers to pay lower prices for energy when demand is low and high prices during peak so demand evens out
Which of the choices below lists stages of coal in order from highest to lowest heat content?
Anthracite-bituminous-lignite-peat
In the majority of less developed countries, the major source of energy for domestic use is which of the following?
Biomass
What form of energy can potentially compete with food resources for a community?
Biomass
Which of the following is a carbon-based renewable resource? I. Coal II. Charcoal III. Solar
Charcoal
About two-thirds of the worlds proven coal reserves are found in
China, US, and Russia
Which of the following are advantages of biofuels as a source of energy? I. Contains modern carbon II. No GHG emissions when burned III. Potentially renewable
Contains modern carbon and potentially renewable
Of the following options to reduce energy demand and impact, which is the simplest and cheapest?
Cut out unnecessary energy waste by improving energy efficiency
Which of the following is an example of passive solar energy?
Designing a home with south facing windows
Petroleum is refined by the process of ____, which utilizes differences in ____ of components of the crude oil mixture.
Distillation/boiling point
Which of the following accurately describes a fuel cell vehicle?
Fuel cell vehicles use hydrogen to generate electricity that powers a battery
Drawbacks include noise and the release of corrosive chemicals
Geothermal
Utilized heavily for electricity generation in Iceland
Geothermal
Which of the following sources of energy is NOT solar-based?
Geothermal(comes from earth)
What technique increases oil and gas production from impermeable source rocks?
Hydraulic fracturing
Why is it possible for nuclear power to completely replace oil and gas in the future?
Nuclear power can supply electricity but it cannot replace other uses of oil and gas
The fossil fuels that are often harvested together are I. Oil II. Coal III. Natural Gas
Oil and Natural Gas
Converts solar energy directly into electrical energy
Photovoltaic/solar
Which of the following actions would reduce global greenhouse emissions?
Replacing coal-burning power plants with wind farms
Which of the following is a policy governments can implement to encourage efficient energy use?
Requiring higher fuel economy standards for new cars
Smart-grid technology is needed in the US for all of the following reasons EXCEPT
Smart grid technology is necessary for generating hydroelectric energy
Currently, most of the high-level radioactive waste from nuclear power reactors in the US is
Stored in water-filled pools on-site
Which of the following statements describes active solar heating?
Sunlight heats a liquid in a coil that is then used to provide heat for a building
Which of the following sources of biofuel cannot currently be used at a large scale because of its high cellulose content?
Switchgrass
Biological controls are frequently used to replace persistent organic pesticides. Which of the following represents the greatest potential risk associated with the use of biological controls?
The control agent attacks not only the intended target but beneficial species as well
Environmental costs associated with the use of coal include all of the following except?
The creation of highly radioactive waste
The power grid is
The network of power lines that carry electricity from power plants to customers
Losses of usable energy between successive trophic levels in an ecosystem are best accounted for by which of the following?
The second law of thermodynamics
Net energy is
The total useful energy from an energy resource minus the amount of energy used and wasted in producing it.
Which of the following are advantages of tar sands? I. The extraction process has minimal land disruption and loss of habitat II. Tar sand oil has low CO2 and sulfur emissions III. There are large domestic supplies
There are large domestic supplies
Which of the following is considered an advantage of using nuclear power to generate electricity?
There are no on-site air emissions in the process of generating electricity
Which of the following is true of sewage treatment plants in the US?
They are not designed to remove pharmaceuticals from the wastewater.
Which of the following describes a hybrid electric vehicle?
They convert kinetic energy into electrical energy to charge a battery
The fissionable fraction of the fuel in a nuclear reactor is
Uranium-235
Which of the following is used to reduce SOx emissions from coal burning power plants?
Wet scrubber
Control rods in a nuclear reactor are used
absorb neutrons and regulate the rate of fission
