EGEE 102 online exam 1 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
One calorie is defined as the amount of energy that is required to raise the temperature of _____.
- CORRECT ANSWER - 1 g of water by 1 C.
Which of the following is a unit of power? - CORRECT ANSWER - BTU/h
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? -
CORRECT ANSWER - They are the same
Nuclear fusion is a renewable source of energy. - CORRECT ANSWER - True
In which one of the following lists are all energy sources examples of mechanical energy? -
CORRECT ANSWER - Wind, Tidal energy, Coiled spring
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? - CORRECT
ANSWER - Both exerted the same power
Energy can be converted from one from to another. - CORRECT ANSWER - True
Geothermal heat can be used to produce electricity. - CORRECT ANSWER - 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? - CORRECT ANSWER - 1.02
,Energy = power x time of usage
Incand.= 100W x 120h = 12000Wh
=12 kWh
One BTU of energy is enough to do what? - CORRECT ANSWER - Heat one pound of water
by one degree Fahrenheit.
The form of energy stored in gasoline is - CORRECT ANSWER - Chemical
Energy can be converted to which of the following? - CORRECT ANSWER - work, heat,
radiation
Units of energy when divided by time of usage give units of _____. - CORRECT ANSWER -
Power
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? - CORRECT
ANSWER - 32.6
A refrigerator rated at 318 Watts running 11 h everyday. What is the energy consumption in
kWh for a week? - CORRECT ANSWER - 24.5
A BTU has more energy than a calorie. - CORRECT ANSWER - True
Identify the list where all energy sources are non-renewable energy sources. - CORRECT
ANSWER - Nuclear Fission (not fusion), Petroleum
, An energy source is nonrenewable if _____. - CORRECT ANSWER - C ) if the source cannot
be regenerated in a reasonable time period.
Which one of the following sustainable energy sources is producing significant amount of
renewable energy in the US? - CORRECT ANSWER - Hydro
BUT
In the U.S., biomass (wood) contributes highest share of renewable energy followed by hydro-
electric
Coal reserves for the World at the present rate of consumption will last for about
________(ballpark figure). - CORRECT ANSWER - 200 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
What percentage of the U.S. energy demand is met by renewable energy sources? - CORRECT
ANSWER - around 10%
Only a very small percentage (about 7%) of the U.S. energy comes from renewable energy
sources such as wood and water (hydroelectricity).
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? - CORRECT
ANSWER - 19.44 Years
Doubling time = 70 / percentage rate of increase per year
ACTUAL Exam Questions and CORRECT
Answers
One calorie is defined as the amount of energy that is required to raise the temperature of _____.
- CORRECT ANSWER - 1 g of water by 1 C.
Which of the following is a unit of power? - CORRECT ANSWER - BTU/h
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? -
CORRECT ANSWER - They are the same
Nuclear fusion is a renewable source of energy. - CORRECT ANSWER - True
In which one of the following lists are all energy sources examples of mechanical energy? -
CORRECT ANSWER - Wind, Tidal energy, Coiled spring
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? - CORRECT
ANSWER - Both exerted the same power
Energy can be converted from one from to another. - CORRECT ANSWER - True
Geothermal heat can be used to produce electricity. - CORRECT ANSWER - 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? - CORRECT ANSWER - 1.02
,Energy = power x time of usage
Incand.= 100W x 120h = 12000Wh
=12 kWh
One BTU of energy is enough to do what? - CORRECT ANSWER - Heat one pound of water
by one degree Fahrenheit.
The form of energy stored in gasoline is - CORRECT ANSWER - Chemical
Energy can be converted to which of the following? - CORRECT ANSWER - work, heat,
radiation
Units of energy when divided by time of usage give units of _____. - CORRECT ANSWER -
Power
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? - CORRECT
ANSWER - 32.6
A refrigerator rated at 318 Watts running 11 h everyday. What is the energy consumption in
kWh for a week? - CORRECT ANSWER - 24.5
A BTU has more energy than a calorie. - CORRECT ANSWER - True
Identify the list where all energy sources are non-renewable energy sources. - CORRECT
ANSWER - Nuclear Fission (not fusion), Petroleum
, An energy source is nonrenewable if _____. - CORRECT ANSWER - C ) if the source cannot
be regenerated in a reasonable time period.
Which one of the following sustainable energy sources is producing significant amount of
renewable energy in the US? - CORRECT ANSWER - Hydro
BUT
In the U.S., biomass (wood) contributes highest share of renewable energy followed by hydro-
electric
Coal reserves for the World at the present rate of consumption will last for about
________(ballpark figure). - CORRECT ANSWER - 200 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
What percentage of the U.S. energy demand is met by renewable energy sources? - CORRECT
ANSWER - around 10%
Only a very small percentage (about 7%) of the U.S. energy comes from renewable energy
sources such as wood and water (hydroelectricity).
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? - CORRECT
ANSWER - 19.44 Years
Doubling time = 70 / percentage rate of increase per year
