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EGEE Midterm Exam 1 Review Questions and Answers Graded A+
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EGEE Midterm Exam 1 Review
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EGEE Midterm Exam 1 ReviewA wind turbine costs $10 million to construct and generates $1 million worth of electricity
per year. When has the wind turbine paid for itself (what is the pay-back period)? -
answer10 Years
What do you think "embedded" energy is? - answerThe energy that goes into making
something.
What is the biggest use of energy in a home? - answerheating and air conditioning
Kevin lives next to a power plant that burns coal. He wants to be more green, so he
buys an electric car that he can plug into his home electricity. What is powering Kevin's
car? - answercoal
If you have 200 lbs of coal in your shed and you burn 1 lb a day, how long will it last? -
answer200 days
Where do you think coal comes from? - answerhumic swamps millions of years ago
What did coal provide the developed world during the Industrial Revolution? -
answerheat and health problems
electricity and pollution
jobs and job related deaths
Match each of the basic types of energy with its definition. - answerThe energy of
moving things
Kinetic Energy
The energy an object has due to its position Potential Energy
The energy released when atomic nuclei split or fuse Nuclear
The energy of heat or temperature Thermal
Energy transmitted via electromagnetic waves Radiant
Energy stored in the bonds between atoms Chemical
The energy of flowing electrons Electrical
, Which of the following are units of energy? Check all that qualify. - answerjoule
BTU
kilowatt hour
Calorie
Which of the following are units of power? Check all that qualify. - answerwatt
horsepower
Match the scenario with the conversion between energy forms involved. -
answerElectrical to Chemical
A cell phone is plugged in overnight and its battery is recharged.
Kinetic to Potential A power company pumps water from a river up into a mountain lake.
Chemical to Heat I eat a bagel and fall asleep for nine hours.
Heat to Chemical A lab attendant cooks up a batch of a chemical compound.
Potential to Kinetic A bowling ball descends from the top of the back-swing and contacts
the floor smoothly.
Chemical to Electrical A battery supplies the electricity to spin the motor in an electric
toothbrush.
Kinetic to Electrical The spinning armature in a generator pushes electrons through a
wire.
Kinetic to Heat The pads in a car's disk brakes slow the car and get hot.
Heat to Kinetic Very hot, high pressure steam spins a turbine.
Radiant to Chemical A plant's leaf makes sugar in the afternoon.
Heat to Radiant A star shines in space.
Choose the answer that lists the correct sequence of steps in the process of turning a
fuel into electricity that is available in your home. - answerA fuel is burned in a boiler.
Water absorbs heat and boils into steam.
High-pressure steam is directed through a turbine, causing it to spin.
A turbine spins an electric generator, pushing electrons through wires.
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