EGEE – Exam 1 – Energy and Environmental Engineering – study
material
One BTU of energy is enough to do what - ANS ✔✔Heat one pound of pound of water by one degree
Fahrenheit
Units of energy when divided by time of usage give units of - ANS ✔✔power
which one of the following is a unit of power - ANS ✔✔Btu/h
energy in uranium is stored as _____ energy - ANS ✔✔nuclear
uranium is a radio active material. Energy in Uranium is stored as nuclear energy.
Therm is a unit that is generally used to measure the energy contained in natural gas - ANS ✔✔TRUE
An old refrigerator which is rated at 489 Watts and runs for 12 hours everyday is replaced by a new
energy efficient refrigerator which is rated at 225 Watts and is expected to run 8 hours everyday. If
electricity costs 11 cents per kWh, what are the energy savings in the month of December in dollars? -
ANS ✔✔13.87
energy consumed in december 489/1000*12 *31 =181.91
electricity cost = 181.91*11/100= 20.01
energy consumed in december 225/1000* 8 *31= 55.8
electricity cost =55.8*11/100=6.14
energy savings= 20.01-6.13=13.87
kWh is a unit of power - ANS ✔✔FALSE
A room air conditioner used by Joel is rated at 582 watts. Joel used the air conditioner for 8 hours every
week during summer. Calculate the total energy consumed by the air conditioner (in kWh) during the
summer semester which runs for 8 weeks? - ANS ✔✔37.2
energy consumption = 582/1000* 8 * 8
, Calorie/second is a unit of... - ANS ✔✔power
If Peter expends 2,000 calories running a mile in one hour and Samantha burns 1000 calories riding a
bike in thirty minutes. Who spent the greatest amount of energy during their exercise? - ANS
✔✔peter
Power = Energy / Time
From the following, identify the list where all energy sources are non-renewable energy sources. - ANS
✔✔Nuclear Fission, Petroleum
Jane uses a water heater that is rated at 4030 watts for 9.1 hours everyday. The cost of electricity in her
region is 13.7 cents per kWh. Calculate the annual operating cost for the water heater in dollars. - ANS
✔✔1833.33
annual energy consumption 4030/1000 * 9.1 *365= 13,385.65
annual operating cost= 13,385.65*13.7/100
Energy in wood (renewable) is stored as _____. - ANS ✔✔chemical
One calorie is defined as the amount of energy that is required to raise the temperature of _____. - ANS
✔✔1 g of water by 1ºC.
Which energy source accounts for the greatest proportion of electricity generation in the US? - ANS
✔✔coal
To produce one dollar worth of goods and services, the U.S. uses less energy than any other country in
the world. - ANS ✔✔false
Which one of the following sustainable energy sources is producing significant amount of renewable
energy in the US? - ANS ✔✔biomass first then hydro
material
One BTU of energy is enough to do what - ANS ✔✔Heat one pound of pound of water by one degree
Fahrenheit
Units of energy when divided by time of usage give units of - ANS ✔✔power
which one of the following is a unit of power - ANS ✔✔Btu/h
energy in uranium is stored as _____ energy - ANS ✔✔nuclear
uranium is a radio active material. Energy in Uranium is stored as nuclear energy.
Therm is a unit that is generally used to measure the energy contained in natural gas - ANS ✔✔TRUE
An old refrigerator which is rated at 489 Watts and runs for 12 hours everyday is replaced by a new
energy efficient refrigerator which is rated at 225 Watts and is expected to run 8 hours everyday. If
electricity costs 11 cents per kWh, what are the energy savings in the month of December in dollars? -
ANS ✔✔13.87
energy consumed in december 489/1000*12 *31 =181.91
electricity cost = 181.91*11/100= 20.01
energy consumed in december 225/1000* 8 *31= 55.8
electricity cost =55.8*11/100=6.14
energy savings= 20.01-6.13=13.87
kWh is a unit of power - ANS ✔✔FALSE
A room air conditioner used by Joel is rated at 582 watts. Joel used the air conditioner for 8 hours every
week during summer. Calculate the total energy consumed by the air conditioner (in kWh) during the
summer semester which runs for 8 weeks? - ANS ✔✔37.2
energy consumption = 582/1000* 8 * 8
, Calorie/second is a unit of... - ANS ✔✔power
If Peter expends 2,000 calories running a mile in one hour and Samantha burns 1000 calories riding a
bike in thirty minutes. Who spent the greatest amount of energy during their exercise? - ANS
✔✔peter
Power = Energy / Time
From the following, identify the list where all energy sources are non-renewable energy sources. - ANS
✔✔Nuclear Fission, Petroleum
Jane uses a water heater that is rated at 4030 watts for 9.1 hours everyday. The cost of electricity in her
region is 13.7 cents per kWh. Calculate the annual operating cost for the water heater in dollars. - ANS
✔✔1833.33
annual energy consumption 4030/1000 * 9.1 *365= 13,385.65
annual operating cost= 13,385.65*13.7/100
Energy in wood (renewable) is stored as _____. - ANS ✔✔chemical
One calorie is defined as the amount of energy that is required to raise the temperature of _____. - ANS
✔✔1 g of water by 1ºC.
Which energy source accounts for the greatest proportion of electricity generation in the US? - ANS
✔✔coal
To produce one dollar worth of goods and services, the U.S. uses less energy than any other country in
the world. - ANS ✔✔false
Which one of the following sustainable energy sources is producing significant amount of renewable
energy in the US? - ANS ✔✔biomass first then hydro
