EGEE 102 Final Exam 2025 Questions
and Answers
Energy can be converted to what? - ....ANSWER ...-Work, heat, radiation
What are the units of energy? - ....ANSWER ...-BTU, Calorie (food calorie), calorie,
Joules, kWh, Therm
What are the units of power? - ....ANSWER ...-Watts, kW, J/s, HP, cal/s, Btu/h
One BTU is defined as the amount of energy required to raise the temperature of what? -
....ANSWER ...-Heat one pound of water by one degree Farenheit
One calorie is defined as the amount of energy required to raise the temperature of what?
- ....ANSWER ...-Heat one gram of water by one degree Celcius
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
of savings of the fluorescent bulb? - ....ANSWER ...-1.02
((100/1000)-(15/1000))*(120)*(0.10)
If Peter expends 1,500 calories running a mile in one hour and Samantha burns 1,500
calories riding a bike in 45 minutes, which of the two spent the greatest amount of
energy? - ....ANSWER ...-They are the same.
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1
,(Samantha used more power)
If Peter expends 2,000 calories running a mile in one hour and Samantha burns 1,000
calories riding a bike in 30 minutes, who exerted the greatest amount of energy? -
....ANSWER ...-They are the same
2,000/1=1,000/0.5
Power = - ....ANSWER ...-Energy/Time
A refrigerator rated at 494 Watts running 13 hours everyday is replaced by a new
refrigerator rated at 221 Watts and runs 8 hours per day. What is the energy saving in
kWh for a week? - ....ANSWER ...-32.57
((0.494 * 13)-(0.221*8))*7
True or false: Nuclear fusion is a renewable source of energy - ....ANSWER ...-
True.
(But nuclear fission is not!)
True or False: a BTU has more energy than a calorie - ....ANSWER ...-True
True or False: energy can be converted from one form to another - ....ANSWER ...-
True
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 2
, Geothermal heat can be used to produce electricity - ....ANSWER ...-True
What are examples of mechanical energy? - ....ANSWER ...-Wind, Tidal energy,
coiled spring, hammer being used to pound nails (kinetic), hammer that is raised in
preparation to pound nails (potential)
Mechanic (potential or kinetic possesses energy by virtue of its motion or by virtue of its
position relative to a reference point
An energy source is nonrenewable if - ....ANSWER ...-If the source cannot be
regerated in a reasonable period of time
Examples of renewable energy sources - ....ANSWER ...-hydropower, wind, tidal,
geothermal energy from inside the earth, biomass from plans, nuclear fusion
Examples of nonrenewable energy sources - ....ANSWER ...-fossil fuels
(petroleum, natural gas, coal), tar sands, nuclear fission
Doubling time= - ....ANSWER ...-70/ (% Growth Rate per Year)
What percentage of US energy demand is met by renewable energy sources? -
....ANSWER ...-Less than 10%
What percentage of the US petroleum demand is met by imports? -
....ANSWER ...-Around 50%
Which fuel supplies the greatest proportion of primary energy in the US? -
....ANSWER ...-Petroleum
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 3
and Answers
Energy can be converted to what? - ....ANSWER ...-Work, heat, radiation
What are the units of energy? - ....ANSWER ...-BTU, Calorie (food calorie), calorie,
Joules, kWh, Therm
What are the units of power? - ....ANSWER ...-Watts, kW, J/s, HP, cal/s, Btu/h
One BTU is defined as the amount of energy required to raise the temperature of what? -
....ANSWER ...-Heat one pound of water by one degree Farenheit
One calorie is defined as the amount of energy required to raise the temperature of what?
- ....ANSWER ...-Heat one gram of water by one degree Celcius
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
of savings of the fluorescent bulb? - ....ANSWER ...-1.02
((100/1000)-(15/1000))*(120)*(0.10)
If Peter expends 1,500 calories running a mile in one hour and Samantha burns 1,500
calories riding a bike in 45 minutes, which of the two spent the greatest amount of
energy? - ....ANSWER ...-They are the same.
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1
,(Samantha used more power)
If Peter expends 2,000 calories running a mile in one hour and Samantha burns 1,000
calories riding a bike in 30 minutes, who exerted the greatest amount of energy? -
....ANSWER ...-They are the same
2,000/1=1,000/0.5
Power = - ....ANSWER ...-Energy/Time
A refrigerator rated at 494 Watts running 13 hours everyday is replaced by a new
refrigerator rated at 221 Watts and runs 8 hours per day. What is the energy saving in
kWh for a week? - ....ANSWER ...-32.57
((0.494 * 13)-(0.221*8))*7
True or false: Nuclear fusion is a renewable source of energy - ....ANSWER ...-
True.
(But nuclear fission is not!)
True or False: a BTU has more energy than a calorie - ....ANSWER ...-True
True or False: energy can be converted from one form to another - ....ANSWER ...-
True
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 2
, Geothermal heat can be used to produce electricity - ....ANSWER ...-True
What are examples of mechanical energy? - ....ANSWER ...-Wind, Tidal energy,
coiled spring, hammer being used to pound nails (kinetic), hammer that is raised in
preparation to pound nails (potential)
Mechanic (potential or kinetic possesses energy by virtue of its motion or by virtue of its
position relative to a reference point
An energy source is nonrenewable if - ....ANSWER ...-If the source cannot be
regerated in a reasonable period of time
Examples of renewable energy sources - ....ANSWER ...-hydropower, wind, tidal,
geothermal energy from inside the earth, biomass from plans, nuclear fusion
Examples of nonrenewable energy sources - ....ANSWER ...-fossil fuels
(petroleum, natural gas, coal), tar sands, nuclear fission
Doubling time= - ....ANSWER ...-70/ (% Growth Rate per Year)
What percentage of US energy demand is met by renewable energy sources? -
....ANSWER ...-Less than 10%
What percentage of the US petroleum demand is met by imports? -
....ANSWER ...-Around 50%
Which fuel supplies the greatest proportion of primary energy in the US? -
....ANSWER ...-Petroleum
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 3
