EGEE 102 Final Exam ACTUAL Exam
Questions and CORRECT Answers
What is the name given to the weatherization process used in sealing cracks in windows, doors
and walls?
A ) Caulking
B ) Insulating
C ) Painting - CORRECT ANSWER - A ) Caulking
Caulking is used in weatherization process used in sealing cracks in windows, doors and walls
A house that effectively uses passive solar heating and cooling will_____.
\ - CORRECT ANSWER - A ) Face south and have deciduous trees growing on the south side
to block heat in the summer and allow sunlight in the winter.
A house that effectively uses passive solar heating and cooling will face south and have
deciduous trees growing on the south side to block heat in the summer and allow sunlight in the
winter
Using kitchen and bath exhaust fans may adversely affect the heating and cooling requirements. -
CORRECT ANSWER - A ) TRUE
Use of kitchen and bath exhaust fans lead to venting out already heated or cooled from inside the
house. This increases heating and cooling requirements.
,On a summer afternoon you should keep the draperies closed on all west-facing windows to
block out the hot sun - CORRECT ANSWER - A ) TRUE
On a summer afternoon you should keep the draperies closed on all west-facing windows to
block out the hot sun
The home heating and cooling system is the major residential user of energy - CORRECT
ANSWER - A ) TRUE
The home heating and cooling system is the major residential user of energy
What happens to the high temperature, high pressure refrigerant after it comes out of the
compressor of a heat pump (heating mode)? - CORRECT ANSWER - D ) It condenses in the
coil, giving off heat to the inside
In heating mode, high temperature, high pressure refrigerant comes out of the compressor and
condenses, giving off heat to the inside
What is the process by which forced-air furnace systems distribute heat? - CORRECT
ANSWER - B ) Convection
When air is circulated, heat is transfered by convection.
The average cost of electricity in the US is ______. - CORRECT ANSWER - A ) $80/MWh
,Typical Electricity price is $0.08/KWH = $80.00/MWH
Which of the following is recommended to look at when purchasing a furnace - CORRECT
ANSWER - A ) Annual Fuel Utilization Efficiency
Annual Fuel Utilization Efficiency
The work (energy) input to a heat pump system is at the _____. - CORRECT ANSWER -C)
Compressor
The work (energy) input to a heat pump system is at the compressor
Keep the draperies and shades on your south-facing windows open during a _____________ day
to cut down energy costs. - CORRECT ANSWER - B ) Winter
Keep the draperies and shades on your south-facing windows open during a winter day to cut
down energy costs
Nearly one half of the energy used at home is for _____.
\ - CORRECT ANSWER - B ) Space heating and cooling
Nearly 47% of the energy at home is used for home heating and cooling
In a baseboard radiator _____ increase(s) the surface area, which in turn leads to more efficient
heat transfer." - CORRECT ANSWER - D ) Fins
, In a baseboard radiator fins increase the surface area, which in turn leads to more efficient heat
transfer.
A freezer maintains a temperature of 30ºF while the outside temperature is 75ºF. What is the
COP of the freezer cooling system? - CORRECT ANSWER - B ) 11.8
COP = Thot/(Thot-Tcold)
Tcold = 30 F = (30-32)x5/9 C = -1.11 C = -1.11 + 273 K = 271.89 K
Thot = 75 F = (75-32)x5/9 C = 23.89 C = 23.89 + 273 K = 296.89 K
COP = 296.89/(296.89-271.89) = 11.87
A heat pump (heating) with a COP of 3.3 maintains an indoor temperature of 65 degrees F. What
is the outside temperature (in oF)? - CORRECT ANSWER - A ) -94 F
65 oF = (65 - 32) oC = 18.33oC = 18.33 + 273 K= 291.33 K
' 3.3 = 291.33 / (291.33 - tcold)
' tcold = 291.33 - 291..3 = 203.04 K = 203.04 - 273 oC = -69.96 oC = (-69.96 x ) + 32
oF = -93.93 oF
All of the following are examples of ways to improve energy efficiency of heating systems,
except _______. - CORRECT ANSWER - D ) Opening the front door in winter to filter and
clean warm air.
Open front door. In the winter, it is best to keep the outside doors shut or close them quickly so
the heat doesn't escape.
Questions and CORRECT Answers
What is the name given to the weatherization process used in sealing cracks in windows, doors
and walls?
A ) Caulking
B ) Insulating
C ) Painting - CORRECT ANSWER - A ) Caulking
Caulking is used in weatherization process used in sealing cracks in windows, doors and walls
A house that effectively uses passive solar heating and cooling will_____.
\ - CORRECT ANSWER - A ) Face south and have deciduous trees growing on the south side
to block heat in the summer and allow sunlight in the winter.
A house that effectively uses passive solar heating and cooling will face south and have
deciduous trees growing on the south side to block heat in the summer and allow sunlight in the
winter
Using kitchen and bath exhaust fans may adversely affect the heating and cooling requirements. -
CORRECT ANSWER - A ) TRUE
Use of kitchen and bath exhaust fans lead to venting out already heated or cooled from inside the
house. This increases heating and cooling requirements.
,On a summer afternoon you should keep the draperies closed on all west-facing windows to
block out the hot sun - CORRECT ANSWER - A ) TRUE
On a summer afternoon you should keep the draperies closed on all west-facing windows to
block out the hot sun
The home heating and cooling system is the major residential user of energy - CORRECT
ANSWER - A ) TRUE
The home heating and cooling system is the major residential user of energy
What happens to the high temperature, high pressure refrigerant after it comes out of the
compressor of a heat pump (heating mode)? - CORRECT ANSWER - D ) It condenses in the
coil, giving off heat to the inside
In heating mode, high temperature, high pressure refrigerant comes out of the compressor and
condenses, giving off heat to the inside
What is the process by which forced-air furnace systems distribute heat? - CORRECT
ANSWER - B ) Convection
When air is circulated, heat is transfered by convection.
The average cost of electricity in the US is ______. - CORRECT ANSWER - A ) $80/MWh
,Typical Electricity price is $0.08/KWH = $80.00/MWH
Which of the following is recommended to look at when purchasing a furnace - CORRECT
ANSWER - A ) Annual Fuel Utilization Efficiency
Annual Fuel Utilization Efficiency
The work (energy) input to a heat pump system is at the _____. - CORRECT ANSWER -C)
Compressor
The work (energy) input to a heat pump system is at the compressor
Keep the draperies and shades on your south-facing windows open during a _____________ day
to cut down energy costs. - CORRECT ANSWER - B ) Winter
Keep the draperies and shades on your south-facing windows open during a winter day to cut
down energy costs
Nearly one half of the energy used at home is for _____.
\ - CORRECT ANSWER - B ) Space heating and cooling
Nearly 47% of the energy at home is used for home heating and cooling
In a baseboard radiator _____ increase(s) the surface area, which in turn leads to more efficient
heat transfer." - CORRECT ANSWER - D ) Fins
, In a baseboard radiator fins increase the surface area, which in turn leads to more efficient heat
transfer.
A freezer maintains a temperature of 30ºF while the outside temperature is 75ºF. What is the
COP of the freezer cooling system? - CORRECT ANSWER - B ) 11.8
COP = Thot/(Thot-Tcold)
Tcold = 30 F = (30-32)x5/9 C = -1.11 C = -1.11 + 273 K = 271.89 K
Thot = 75 F = (75-32)x5/9 C = 23.89 C = 23.89 + 273 K = 296.89 K
COP = 296.89/(296.89-271.89) = 11.87
A heat pump (heating) with a COP of 3.3 maintains an indoor temperature of 65 degrees F. What
is the outside temperature (in oF)? - CORRECT ANSWER - A ) -94 F
65 oF = (65 - 32) oC = 18.33oC = 18.33 + 273 K= 291.33 K
' 3.3 = 291.33 / (291.33 - tcold)
' tcold = 291.33 - 291..3 = 203.04 K = 203.04 - 273 oC = -69.96 oC = (-69.96 x ) + 32
oF = -93.93 oF
All of the following are examples of ways to improve energy efficiency of heating systems,
except _______. - CORRECT ANSWER - D ) Opening the front door in winter to filter and
clean warm air.
Open front door. In the winter, it is best to keep the outside doors shut or close them quickly so
the heat doesn't escape.
