9 Practice Test

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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


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