PSU EGEE 102 Exam 1Questions and
answers
True or false: Geothermal heat can be used to produce electricity. ✅✅True
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? ✅✅$1.02
One calorie is defined as the amount of energy that is required to raise the temperature of
__________. ✅✅1 g of water by 1 C
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? ✅✅Both exerted the same
power
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? ✅✅They
are the same
One BTU of energy is enough to do what? ✅✅Heat one pound of water by one degree Fahrenheit
True or false: Nuclear fusion is a renewable source of energy. ✅✅True
Which of the following is a unit of power? ✅✅BTU/h
An energy source is nonrenewable if __________ ✅✅If the source cannot be regenerated in a
reasonable time period
Units of energy when divided by time of usage give units of __________ ✅✅Power
What can energy be converted into? ✅✅Work, heat, radiation
, What are examples of energy sources of mechanical energy? ✅✅Wind, Tidal energy, Coiled spring
True or false: Energy can be converted from one from to another. ✅✅True
The form of energy stored in gasoline is ✅✅Chemical
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? ✅✅32.6
True or false: A BTU has more energy than a calorie. ✅✅True
What are non-renewable energy sources? ✅✅Nuclear Fission, Petroleum
A refrigerator rated at 278 Watts running 14 h everyday. What is the energy consumption in kWh for
a week? ✅✅27.2
In which continent is the per capita energy consumption the highest in the world? ✅✅North
America
What two sustainable energy sources are producing significant amount of renewable energy in the
US? ✅✅Biomass (wood) then hydro-electric
Coal reserves for the World at the present rate of consumption will last for about __________
(ballpark figure). ✅✅200 years
At the present rate of consumption, how long are the U.S. petroleum reserves expected to last if we
do not import any crude oil (a ballpark figure)? ✅✅Less than 10 years
Which fuel supplies the greatest proportion of primary energy in the U.S.? ✅✅Petroleum
Energy use in China is projected to increase at the rate of 2.0% per year for the next few decades.
How long will it take for energy consumption in China to double? ✅✅70/2.0 = 35 years
answers
True or false: Geothermal heat can be used to produce electricity. ✅✅True
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? ✅✅$1.02
One calorie is defined as the amount of energy that is required to raise the temperature of
__________. ✅✅1 g of water by 1 C
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? ✅✅Both exerted the same
power
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? ✅✅They
are the same
One BTU of energy is enough to do what? ✅✅Heat one pound of water by one degree Fahrenheit
True or false: Nuclear fusion is a renewable source of energy. ✅✅True
Which of the following is a unit of power? ✅✅BTU/h
An energy source is nonrenewable if __________ ✅✅If the source cannot be regenerated in a
reasonable time period
Units of energy when divided by time of usage give units of __________ ✅✅Power
What can energy be converted into? ✅✅Work, heat, radiation
, What are examples of energy sources of mechanical energy? ✅✅Wind, Tidal energy, Coiled spring
True or false: Energy can be converted from one from to another. ✅✅True
The form of energy stored in gasoline is ✅✅Chemical
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? ✅✅32.6
True or false: A BTU has more energy than a calorie. ✅✅True
What are non-renewable energy sources? ✅✅Nuclear Fission, Petroleum
A refrigerator rated at 278 Watts running 14 h everyday. What is the energy consumption in kWh for
a week? ✅✅27.2
In which continent is the per capita energy consumption the highest in the world? ✅✅North
America
What two sustainable energy sources are producing significant amount of renewable energy in the
US? ✅✅Biomass (wood) then hydro-electric
Coal reserves for the World at the present rate of consumption will last for about __________
(ballpark figure). ✅✅200 years
At the present rate of consumption, how long are the U.S. petroleum reserves expected to last if we
do not import any crude oil (a ballpark figure)? ✅✅Less than 10 years
Which fuel supplies the greatest proportion of primary energy in the U.S.? ✅✅Petroleum
Energy use in China is projected to increase at the rate of 2.0% per year for the next few decades.
How long will it take for energy consumption in China to double? ✅✅70/2.0 = 35 years
