EGEE 102 Exam 2 ACTUAL Exam
Questions and CORRECT Answers
Placing your clothes dryer in a cold basement will make the dryer... - CORRECT
ANSWER less efficient
On-demand water heaters have a storage tank. - CORRECT ANSWER false, On-demand
water heaters are in-line heaters and don't have a storage tank.
A family of four, each showering for five minutes a day, uses 700 gallons of water every week.
Installing a low-flow non-aerating showerhead can cut this consumption by how much? -
CORRECT ANSWER 0.5 ,
Using a low flow non-aerating showerhead can cut water consumption by about 50%.
An old refrigerator consumes 212 W of power. Assuming that the refrigerator operates for 18
hours every day, what is the annual operating cost of the refrigerator, if the cost of electricity is
$0.09 per kWh? - CORRECT ANSWER 125.36
Annual operating cost = 212/1000 x 18 x 0.09 x 365 = $125.355
Insulating hot water pipes reduces the energy consumption for water heating. - CORRECT
ANSWER true
112 gal of water is heated in a heater from 55oF to 136oF everyday by a family. What is the
annual energy requirement of the water heater? - CORRECT ANSWER 27483624 BTUs
1 gal of water weighs 8.3 lbs Annual Energy requirement = 112 x 8.3 x (136-55) x 365 =
27483624 BTUs
For energy-efficient operation of a dishwasher.... - CORRECT ANSWER all of the above
For energy-efficient operation of a dishwasher 1. wash only full loads 2. use the no-heat air dry
feature 3. don't pre-rinse dishes before putting them in the dishwasher
,All major home appliances have an... - CORRECT ANSWER Energy Guide label
Buying an expensive energy efficient water heater will most likely save _____ in the long-term. -
CORRECT ANSWER Both money and energy
The Energy Guide labels must specify the _____ of the particular model - CORRECT
ANSWER Estimated annual energy consumption
What kind of label do highly energy efficient appliances have? - CORRECT
ANSWER Energy Star label
On demand water heaters have large storage tanks. - CORRECT ANSWER false,
On-demand water heaters are in-line heaters and don't have a storage tank.
You can save up to 1/3 of your dishwasher operating costs by allowing the dishes to air dry
rather than go through the dry cycle. - CORRECT ANSWER true
An old refrigerator consumes 210 W of power. Assuming that the refrigerator operates for 19
hours everyday, what is the annual operating cost of the refrigerator, if the cost of electricity is
$0.06 per kWh? - CORRECT ANSWER 87.38
Annual operating cost = 210/1000 x 19 x 0.06 x 365 = $87.381
Water heaters are typically set to... - CORRECT ANSWER 120 degrees F
155 gal of water is heated in a heater from 63oF to 123oF everyday by a family. What is the
annual energy requirement of the water heater? - CORRECT ANSWER 28174350 Btus
1 gal of water weighs 8.3 lbs Annual Energy requirement = 155 x 8.3 x (123-63) x 365 =
28174350 BTUs
, Water heaters consume energy... - CORRECT ANSWER irrespective of whether we use hot
water or not
Natural gas water heaters are cheaper to install than electric water heaters. - CORRECT
ANSWER false,
nat gas water heaters cost more to install than electric water heater
Thermosiphon systems are most efficient in areas with _____ levels of solar radiation. -
CORRECT ANSWER high
What kind of washer is most efficient? - CORRECT ANSWER front loading
Insulating the cold water pipes will save a lot of energy - CORRECT ANSWER false,
Insulating the hot water pipes will save a lot of energy, by reducing the heat lost to the
surroundings.
Natural gas water heaters are cheaper to install than electric water heaters. - CORRECT
ANSWER false,
Electric water heaters are cheaper to install than natural gas water heaters
Water heating bills account for about 14 percent of the average utility bill. How can you reduce
these bills? - CORRECT ANSWER all the above,
Water heating bills can be reduced by 1. use less hot water 2. turn down the thermostat on your
water heater 3. insulate your water heater 4. buy a new, more efficient water heater.
DOE stands for.. - CORRECT ANSWER Department of energy
Frost build up reduces the efficiency of freezers. - CORRECT ANSWER true
Questions and CORRECT Answers
Placing your clothes dryer in a cold basement will make the dryer... - CORRECT
ANSWER less efficient
On-demand water heaters have a storage tank. - CORRECT ANSWER false, On-demand
water heaters are in-line heaters and don't have a storage tank.
A family of four, each showering for five minutes a day, uses 700 gallons of water every week.
Installing a low-flow non-aerating showerhead can cut this consumption by how much? -
CORRECT ANSWER 0.5 ,
Using a low flow non-aerating showerhead can cut water consumption by about 50%.
An old refrigerator consumes 212 W of power. Assuming that the refrigerator operates for 18
hours every day, what is the annual operating cost of the refrigerator, if the cost of electricity is
$0.09 per kWh? - CORRECT ANSWER 125.36
Annual operating cost = 212/1000 x 18 x 0.09 x 365 = $125.355
Insulating hot water pipes reduces the energy consumption for water heating. - CORRECT
ANSWER true
112 gal of water is heated in a heater from 55oF to 136oF everyday by a family. What is the
annual energy requirement of the water heater? - CORRECT ANSWER 27483624 BTUs
1 gal of water weighs 8.3 lbs Annual Energy requirement = 112 x 8.3 x (136-55) x 365 =
27483624 BTUs
For energy-efficient operation of a dishwasher.... - CORRECT ANSWER all of the above
For energy-efficient operation of a dishwasher 1. wash only full loads 2. use the no-heat air dry
feature 3. don't pre-rinse dishes before putting them in the dishwasher
,All major home appliances have an... - CORRECT ANSWER Energy Guide label
Buying an expensive energy efficient water heater will most likely save _____ in the long-term. -
CORRECT ANSWER Both money and energy
The Energy Guide labels must specify the _____ of the particular model - CORRECT
ANSWER Estimated annual energy consumption
What kind of label do highly energy efficient appliances have? - CORRECT
ANSWER Energy Star label
On demand water heaters have large storage tanks. - CORRECT ANSWER false,
On-demand water heaters are in-line heaters and don't have a storage tank.
You can save up to 1/3 of your dishwasher operating costs by allowing the dishes to air dry
rather than go through the dry cycle. - CORRECT ANSWER true
An old refrigerator consumes 210 W of power. Assuming that the refrigerator operates for 19
hours everyday, what is the annual operating cost of the refrigerator, if the cost of electricity is
$0.06 per kWh? - CORRECT ANSWER 87.38
Annual operating cost = 210/1000 x 19 x 0.06 x 365 = $87.381
Water heaters are typically set to... - CORRECT ANSWER 120 degrees F
155 gal of water is heated in a heater from 63oF to 123oF everyday by a family. What is the
annual energy requirement of the water heater? - CORRECT ANSWER 28174350 Btus
1 gal of water weighs 8.3 lbs Annual Energy requirement = 155 x 8.3 x (123-63) x 365 =
28174350 BTUs
, Water heaters consume energy... - CORRECT ANSWER irrespective of whether we use hot
water or not
Natural gas water heaters are cheaper to install than electric water heaters. - CORRECT
ANSWER false,
nat gas water heaters cost more to install than electric water heater
Thermosiphon systems are most efficient in areas with _____ levels of solar radiation. -
CORRECT ANSWER high
What kind of washer is most efficient? - CORRECT ANSWER front loading
Insulating the cold water pipes will save a lot of energy - CORRECT ANSWER false,
Insulating the hot water pipes will save a lot of energy, by reducing the heat lost to the
surroundings.
Natural gas water heaters are cheaper to install than electric water heaters. - CORRECT
ANSWER false,
Electric water heaters are cheaper to install than natural gas water heaters
Water heating bills account for about 14 percent of the average utility bill. How can you reduce
these bills? - CORRECT ANSWER all the above,
Water heating bills can be reduced by 1. use less hot water 2. turn down the thermostat on your
water heater 3. insulate your water heater 4. buy a new, more efficient water heater.
DOE stands for.. - CORRECT ANSWER Department of energy
Frost build up reduces the efficiency of freezers. - CORRECT ANSWER true
