EGEE 102 CERTIFICATION EVALUATION
FULL QUESTIONS WITH COMPLETE
SOLUTION
●● On-demand water heaters have a storage tank.
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?
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?
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.
,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?
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....
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...
Answer: Energy Guide label
●● Buying an expensive energy efficient water heater will most likely
save _____ in the long-term.
Answer: Both money and energy
●● The Energy Guide labels must specify the _____ of the particular
model
Answer: Estimated annual energy consumption
, ●● What kind of label do highly energy efficient appliances have?
Answer: Energy Star label
●● On demand water heaters have large storage tanks.
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.
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?
Answer: 87.38
Annual operating cost = 210/1000 x 19 x 0.06 x 365 = $87.381
●● Water heaters are typically set to...
Answer: 120 degrees F
FULL QUESTIONS WITH COMPLETE
SOLUTION
●● On-demand water heaters have a storage tank.
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?
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?
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.
,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?
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....
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...
Answer: Energy Guide label
●● Buying an expensive energy efficient water heater will most likely
save _____ in the long-term.
Answer: Both money and energy
●● The Energy Guide labels must specify the _____ of the particular
model
Answer: Estimated annual energy consumption
, ●● What kind of label do highly energy efficient appliances have?
Answer: Energy Star label
●● On demand water heaters have large storage tanks.
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.
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?
Answer: 87.38
Annual operating cost = 210/1000 x 19 x 0.06 x 365 = $87.381
●● Water heaters are typically set to...
Answer: 120 degrees F
