In a forced air system with a central air conditioning system installed, humidity is reduced by
running the humidifier in reverse.
condensation at the condensing coil
condensation at the evaporator coil
condensation at the compressor
CORRECT ANSWER
Condensation at the evaporator coil
The evaporator coil is cold, below the dew point so when humid room air hits the coil two
things happen. First the humidity falls out of the coil on contact. Second the air passing
through the coil gives up heat which is absorbed by the refrigerant material.
What is the most likely result of insufficient air flow across the evaporator coil?
Ice forms on the evaporator coil
1
@https://www.stuvia.com/user/thestudyvault
, The measured temperature drop decreases
The fan motor overheats
The compressor stops working
CORRECT ANSWER
Ice forms on the evaporator coil
When evaluating the operation of an AC system during the summer months, the
temperature differential between the supply and return air should typically be:
10-15 ° F.
15-20 ° F.
15-30 ° F.
20-25 ° F.
CORRECT ANSWER
15-20 ° F.
Some printed materials use 14 -22 degrees. In the test select the most correct answer.
2
@https://www.stuvia.com/user/thestudyvault
running the humidifier in reverse.
condensation at the condensing coil
condensation at the evaporator coil
condensation at the compressor
CORRECT ANSWER
Condensation at the evaporator coil
The evaporator coil is cold, below the dew point so when humid room air hits the coil two
things happen. First the humidity falls out of the coil on contact. Second the air passing
through the coil gives up heat which is absorbed by the refrigerant material.
What is the most likely result of insufficient air flow across the evaporator coil?
Ice forms on the evaporator coil
1
@https://www.stuvia.com/user/thestudyvault
, The measured temperature drop decreases
The fan motor overheats
The compressor stops working
CORRECT ANSWER
Ice forms on the evaporator coil
When evaluating the operation of an AC system during the summer months, the
temperature differential between the supply and return air should typically be:
10-15 ° F.
15-20 ° F.
15-30 ° F.
20-25 ° F.
CORRECT ANSWER
15-20 ° F.
Some printed materials use 14 -22 degrees. In the test select the most correct answer.
2
@https://www.stuvia.com/user/thestudyvault
