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EGEE 401 - Exam 1 Questions and Answers
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Exam of 7 pages for the course EGEE at EGEE (EGEE 401 - Exam 1)
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EGEE 401 - Exam 1Nuclear fusion is a renewable source of energy. (T/F) - answerTrue
One calorie is defined as the amount of energy that is required to raise the temperature
of _____. - answer1 g of water by 1ºC.
nergy can be converted to which of the following?
Work
Heat
Radiation
All of the above
None of the above - answerAll of the above
Which one of the following is a unit of power?
Joule
Btu/h
Watt/hour
Quad - answerBtu/h
Power is the rate at which energy is consumed. When we say rate, we mean per unit
time, so BTU/h is a unit of power. Since, Watt is a unit of power, Watt divided by hour is
neither a unit of power not energy.
One BTU of energy is enough to do what? - answerHeat one pound of water by one
degree Fahrenheit.
A 100 watt incandescent light bulb is operated for 120 hours, and a 15 watt LED light
bulb is operated for the same period of time. At 10 cents per kWh, what is the cost
savings of the LED bulb? - answer$1.02
Energy = Power x duration, 100W x 120h = 12,000Wh = 12 kWh 15W x 120h =1,800
Wh = 1.8 kWh Energy savings is the difference (12-1.8) kWh = 10.2 kWh; at the rate of
10 cents per kWh this amounts to $1.02
Energy can be converted from one form to another. (T/F) - answerTrue
Energy cannot be created or destroyed but it can be converted from one form to
another.
A BTU has more energy than a calorie.(T/F) - answerTrue
, A BTU is the amount of heat required to heat 1 lb (454 grams) of water through 1°F.
Whereas 1 calorie is the amount of heat required to raise 1 g of water through 1°C.
Therefore there is more energy in one BTU.
The energy possessed by a ball thrown by a quarterback is of the form -
answerMechanical
Energy from the Sun is coming to the earth in the form of - answerRadiation
An Electric Bulb rated at 60W is used for 10 hours. How much energy is burned? -
answer600Wh
Which consumes the least amount of energy per day?
Eating your recommended amount of Calories
Driving a car 18 miles
Heating a house in the U.S.
Powering a 100 W lightbulb for 24 hours - answerEating your recommended amount of
Calories
Which energy source accounts for the greatest proportion of electricity generation in the
US?
Natural Gas
Petroleum
Coal
Hydro - answerNatural Gas
In 2015, the share of electricity net generation provided by natural gas exceeded that of
coal.
To produce one dollar worth of goods and services, the U.S. uses less energy than any
other country in the world. (T/F) - answerFalse
To produce one dollar worth of goods and services, Japan uses less energy than any
other developed country in the world. Refer to Section 2.2 Global Energy Consumption
and GDP per person graph.
At the present rate of consumption, reserves for which one of the following fuels will last
the longest time?
Petroleum
Coal
Natural Gas - answerCoal
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