EGEE Exam 1 Study
Which of the following is a unit of power? - answerBTU/h
One calorie is defined as the amount of energy that is required to raised the
temperature of ________. - answer1 g of water by 1 C
A 100 watt incandescent light bulb is operated for 120 hours, and a 15 watt fluorescent
light bulb is operated for the same period of time. At 10 cents per kWh, what is the cost
savings of the fluorescent bulb? - answerEnergy = power * time of usage
incand. 1000W * 120h = 12000 Wh = 12kWh
Fluo. = 15W *120h = 1800Wh
1.02
A BTU has more energy than a calorie - answertrue
An energy source is nonrenewable if ______. - answerif the source cannot be
regenerated in a reasonable time period.
The form of energy store in gasoline is - answerChemical
Nuclear fusion is a renewable source of energy. - answerTrue
A refrigerator rated at 494 Watts running 13 h everyday is replaced by a new
refrigerator rated at 221 Watts and runs 8 h per day. What is the energy saving in kWh
for a week? - answer32.6 is the energy saving for one week.
494* 13= 6422 *7 =44954
221* 8 = 1768 * 7= 12,376
44954-12376=32,578
Energy can be converted to which of the following? - answerWork, Heat and Radiation
A refrigerator rated at 412 Watts running 7 h everyday. What is the energy consumption
in kWh for a week? - answer20.2
20,188
One BTU of energy is enough to what what? - answerHeat one pound of water by one
degree Fahrenheit
, If Peter expends 1,500 calories running a mile in one hour and Samantha burns 1,500
calories riding a bike in forty-five minutes. Which one of the two spent the greatest
amount of energy? - answerBoth Samatha and Peter will expend the same amount of
energy
Units of energy when divided by time of usage give units of ___. - answerPower
If Peter expends 2,000 calories running a mile in one hour and Samantha burns 1,000
calories riding a bike in thirty minutes. who exerted the greatest amount of power -
answerBoth Samatha and Peter expend the same amount of power
Geothermal heat can be used to produce electricity. - answerTrue
In which one of the following lists are all energy sources examples of mechanical
energy? - answerWind, Tidal, and Coiled Spring are all forms of mechanical energy.
In the following, identify the list where all energy sources are non-renewable energy
sources - answerNuclear Fission and Petroleum
Energy can be converted from one form to another. - answerTrue
Energy use in Kunesia is projected to increase at the rate of 4.1% per year for the new
few decades. How long will it take Kunesia to double its current usage in years? -
answerDoubling time = 70/ rate of increase
doubling time = 70/4.1 = 17.07 years
The fastest growth in the energy use is projected for some of the Asian nations -
answerTrue. The fastest growth is projected for the nation of developing Asia, including
China and India, where robust economic growth accompanies the increase in energy
consumption over the forecast period.
In the next 20 years, it is expected that renewable energy sources will supply more than
half of the total U.S. energy requirements - answerFalse, in the next 20 years oil will
supply more than half of the U.S. energy requirements
Coal reserves for the World at the present rate of consumption will last for about ______
(ballpark figure). - answer200 years. At the current rate of consumption, the life time of
the world's petroleum, natural gas, and coal reserves is 40 years, 60 years, and 200
years, respectively
Which fuel supplies the greatest proportion of primary energy in the U.S.? -
answerPetroleum accounts for almost 40% of U.S.'s energy
Energy use in China is projected to increase at the rate of 3.6% per year for the next
few decades. How long will it take for energy consumption in China to double? -
answerDoubling time = 70/3.6 =19.44 years.
Which of the following is a unit of power? - answerBTU/h
One calorie is defined as the amount of energy that is required to raised the
temperature of ________. - answer1 g of water by 1 C
A 100 watt incandescent light bulb is operated for 120 hours, and a 15 watt fluorescent
light bulb is operated for the same period of time. At 10 cents per kWh, what is the cost
savings of the fluorescent bulb? - answerEnergy = power * time of usage
incand. 1000W * 120h = 12000 Wh = 12kWh
Fluo. = 15W *120h = 1800Wh
1.02
A BTU has more energy than a calorie - answertrue
An energy source is nonrenewable if ______. - answerif the source cannot be
regenerated in a reasonable time period.
The form of energy store in gasoline is - answerChemical
Nuclear fusion is a renewable source of energy. - answerTrue
A refrigerator rated at 494 Watts running 13 h everyday is replaced by a new
refrigerator rated at 221 Watts and runs 8 h per day. What is the energy saving in kWh
for a week? - answer32.6 is the energy saving for one week.
494* 13= 6422 *7 =44954
221* 8 = 1768 * 7= 12,376
44954-12376=32,578
Energy can be converted to which of the following? - answerWork, Heat and Radiation
A refrigerator rated at 412 Watts running 7 h everyday. What is the energy consumption
in kWh for a week? - answer20.2
20,188
One BTU of energy is enough to what what? - answerHeat one pound of water by one
degree Fahrenheit
, If Peter expends 1,500 calories running a mile in one hour and Samantha burns 1,500
calories riding a bike in forty-five minutes. Which one of the two spent the greatest
amount of energy? - answerBoth Samatha and Peter will expend the same amount of
energy
Units of energy when divided by time of usage give units of ___. - answerPower
If Peter expends 2,000 calories running a mile in one hour and Samantha burns 1,000
calories riding a bike in thirty minutes. who exerted the greatest amount of power -
answerBoth Samatha and Peter expend the same amount of power
Geothermal heat can be used to produce electricity. - answerTrue
In which one of the following lists are all energy sources examples of mechanical
energy? - answerWind, Tidal, and Coiled Spring are all forms of mechanical energy.
In the following, identify the list where all energy sources are non-renewable energy
sources - answerNuclear Fission and Petroleum
Energy can be converted from one form to another. - answerTrue
Energy use in Kunesia is projected to increase at the rate of 4.1% per year for the new
few decades. How long will it take Kunesia to double its current usage in years? -
answerDoubling time = 70/ rate of increase
doubling time = 70/4.1 = 17.07 years
The fastest growth in the energy use is projected for some of the Asian nations -
answerTrue. The fastest growth is projected for the nation of developing Asia, including
China and India, where robust economic growth accompanies the increase in energy
consumption over the forecast period.
In the next 20 years, it is expected that renewable energy sources will supply more than
half of the total U.S. energy requirements - answerFalse, in the next 20 years oil will
supply more than half of the U.S. energy requirements
Coal reserves for the World at the present rate of consumption will last for about ______
(ballpark figure). - answer200 years. At the current rate of consumption, the life time of
the world's petroleum, natural gas, and coal reserves is 40 years, 60 years, and 200
years, respectively
Which fuel supplies the greatest proportion of primary energy in the U.S.? -
answerPetroleum accounts for almost 40% of U.S.'s energy
Energy use in China is projected to increase at the rate of 3.6% per year for the next
few decades. How long will it take for energy consumption in China to double? -
answerDoubling time = 70/3.6 =19.44 years.
