EGEE 102 Final UPDATED Exam
Questions and CORRECT Answers
Lesson 9 - CORRECT ANSWER
Each degree setting below 78ºF will increase your energy consumption by approximately 8
percent. - CORRECT ANSWER True
The higher the "SEER" of a central air conditioner, the cheaper it is to operate. - CORRECT
ANSWER True
When air is heated its relative humidity ________ - CORRECT ANSWER Decreases
Air is saturated when - CORRECT ANSWER It contains maximum amount of moisture
possible at that temperature
Air is saturated when - CORRECT ANSWER Its relative humidity is 100%
In the expansion valve of an air conditioner, temperature - CORRECT ANSWER Decreases
In the compressor of an air conditioner, temperature - CORRECT ANSWER Increases
Size of air conditioner doesn't depend on how much shade is on your home's windows, walls and
roofs. - CORRECT ANSWER False
Size of air conditioner depends on how much heat the accupants and appliances in your home
generate. - CORRECT ANSWER True
, John Jankomsky has an air conditioner that is rated at 7000 BTUs/h with an EER of 8 what is the
power consumption of the air conditioner? - CORRECT ANSWER 875 watts
Your old high school pal Mike Errington wants to upgrade an old 1976 vintage room air
conditioner that is believed to operate at an EER of 7. He is considering a room air conditioner
with an EER of 14. He wants to know by what percentage is electricity consumption would
reduce? Can you help find it? - CORRECT ANSWER 50%
If the owner replaces his old 3 ton air conditioner (SEER=12) with a new 3 ton air conditioner
(SEER=14), which costs $500 more, what is the payback period? Assume that he operates his air
conditioner for about 2000 hrs in a yr and cost of electricity is 9.2 cents per kwh. - CORRECT
ANSWER 6.34 years
Which term is used to define the energy efficiency of a room air conditioner? - CORRECT
ANSWER EER
_____________ relative humidity feels uncomfortable. - CORRECT ANSWER Both very
high and very low
From an energy efficient point of view, an air conditioner should be mounted on - CORRECT
ANSWER the shady side of the house
In general, air conditioners are rated in tons. A ton of refrigeration transfers - CORRECT
ANSWER 12,000 BTUs/h
Effective shading can be provided by trees and other vegetation - CORRECT ANSWER True
Size of air conditioner doesn't depend on how much shade is on your home's windows, walls and
roofs. - CORRECT ANSWER False
Room air conditioners have a higher efficiency than central air conditioners. - CORRECT
ANSWER False
Questions and CORRECT Answers
Lesson 9 - CORRECT ANSWER
Each degree setting below 78ºF will increase your energy consumption by approximately 8
percent. - CORRECT ANSWER True
The higher the "SEER" of a central air conditioner, the cheaper it is to operate. - CORRECT
ANSWER True
When air is heated its relative humidity ________ - CORRECT ANSWER Decreases
Air is saturated when - CORRECT ANSWER It contains maximum amount of moisture
possible at that temperature
Air is saturated when - CORRECT ANSWER Its relative humidity is 100%
In the expansion valve of an air conditioner, temperature - CORRECT ANSWER Decreases
In the compressor of an air conditioner, temperature - CORRECT ANSWER Increases
Size of air conditioner doesn't depend on how much shade is on your home's windows, walls and
roofs. - CORRECT ANSWER False
Size of air conditioner depends on how much heat the accupants and appliances in your home
generate. - CORRECT ANSWER True
, John Jankomsky has an air conditioner that is rated at 7000 BTUs/h with an EER of 8 what is the
power consumption of the air conditioner? - CORRECT ANSWER 875 watts
Your old high school pal Mike Errington wants to upgrade an old 1976 vintage room air
conditioner that is believed to operate at an EER of 7. He is considering a room air conditioner
with an EER of 14. He wants to know by what percentage is electricity consumption would
reduce? Can you help find it? - CORRECT ANSWER 50%
If the owner replaces his old 3 ton air conditioner (SEER=12) with a new 3 ton air conditioner
(SEER=14), which costs $500 more, what is the payback period? Assume that he operates his air
conditioner for about 2000 hrs in a yr and cost of electricity is 9.2 cents per kwh. - CORRECT
ANSWER 6.34 years
Which term is used to define the energy efficiency of a room air conditioner? - CORRECT
ANSWER EER
_____________ relative humidity feels uncomfortable. - CORRECT ANSWER Both very
high and very low
From an energy efficient point of view, an air conditioner should be mounted on - CORRECT
ANSWER the shady side of the house
In general, air conditioners are rated in tons. A ton of refrigeration transfers - CORRECT
ANSWER 12,000 BTUs/h
Effective shading can be provided by trees and other vegetation - CORRECT ANSWER True
Size of air conditioner doesn't depend on how much shade is on your home's windows, walls and
roofs. - CORRECT ANSWER False
Room air conditioners have a higher efficiency than central air conditioners. - CORRECT
ANSWER False
