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EGEE Midterm 2 Questions and Answers
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EGEE Midterm 2 Questions
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EGEE Midterm 2 QuestionsWhich primary energy source is the biggest contributor to the US electricity generation
system?
A) Nuclear
B) Natural gas
C) Coal
D) Hydropower
E) Coal and Natural Gas are are equally the biggest - answerCoal and Natural Gas are
equally the biggest
Which electricity generating device DOES NOT involve spinning a generator?
A) Solar photovoltaic arrays
B) Coal-fired power plant
C) Nuclear power plant
D) Hydropower at a dam - answerSolar photovoltaic arrays
Which step in the process of converting a fuel to electricity is the least efficient?
A) Electricity distribution
B) Chemical to heat (hot gases)
C) Mechanical to electrical (turning a generator)
D) Heat to mechanical (making a turbine spin) - answerHeat to mechanical (making a
turbine spin)
Most of the electricity in the US is generated using nuclear energy.
A) True
B) False - answerFalse; coal is the major contributor
A step down transformer is used to decrease high voltage from transmission lines to low
voltage (110V) so it can be distributed to homes and businesses.
A) True
B) False - answerTrue
Electrical energy is measured in terms of KWh
A) True
B) False - answerTrue
Central distribution is more efficient than distributed generation for transmitting
electricity.
A) True
B) False - answerFalse
,Central distribution uses coal, nuclear, hydropower or gas powered plants to generate
and transmit electricity over long distances.
A) True
B) False - answerTrue
Distributed generation reduces the amount of energy lost in transmitting electricity, as
electricity is produced very near to the place where it is used.
A) True
B) False - answerTrue
High voltage transmission lines are used to carry electricity over long distances.
A) True
B) False - answerTrue
Wind turbine converts the kinetic energy of air into mechanical energy through the
rotation of blades.
A) True
B) False - answerTrue
A step-up transformer is used to decrease the voltage, so that electricity can be
transmitted over long distances.
A) True
B) False - answerFalse
Electric power is measured in terms of voltage.
A) True
B) False - answerFalse; unit of electric power is Watts
In a nuclear power plant, nuclear reactions are used for converting water into steam.
A) True
B) False - answerTrue
Electricity can be generated from fossil fuels.
A) True
B) False - answerTrue; Fossil fuels such as coal or natural gas are used to generate
electricity in power plants. Chemical energy in fossil fuels is converted into electricity in
these plants.
What is the function of a generator in a power plant?
A) Convert chemical energy to mechanical energy
B) Convert mechanical energy to electrical energy
C) Convert thermal energy to mechanical energy
D) None of the above - answerConvert mechanical energy to electrical energy
What is the energy conversion that takes place in a turbine in a power plant?
, A) Thermal energy to electricity
B) Thermal energy to mechanical energy
C) Chemical energy to Thermal energy
D) Mechanical energy to electricity - answerThermal energy to mechanical energy
A standard steam power plant is more efficient than Cogeneration.
A) True
B) False - answerFalse
Electricity can be generated using a magnetic field.
A. True
B. False - answerTrue
Which of the following primary energy resources contributes the most to the production
of electricity?
A) Nuclear
B) Hydroelectric
C) Natural gas
D) Coal - answerCoal
In a gas turbine power plant, which fuel is burned to run the turbine?
A) water
B) Coal
C) Natural gas
D) Petroleum - answerNatural Gas
Electric power is measured as
A) Velocity multiplied by time
B) Velocity multiplied by current
C) Voltage multiplied by current
D) None of the above - answerVoltage multiplied by current
A generator works on the principle of electromagnetic induction.
A) True
B) False - answerTrue
In a power plant, chemical energy is converted to what useful end product?
A) Mechanical energy
B) Electrical energy
C) Thermal energy
D) None of the above - answerElectrical energy; chemical energy is converted into
thermal energy in the boiler, which is then converted to mechanical energy in the turbine
followed by generation of electricity by the generator.
Which power plant uses both gas and steam turbine to produce electricity?
A) Gas turbine power plant
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