4673987
Beschreibung
Quiz von Neil Revollo, aktualisiert more than 1 year ago
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Erstellt von Neil Revollo
vor etwa 8 Jahre
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Frage 1
Frage
The total heat content of infiltrated air of the same dry-bulb temperature may vary from one part of the country to another because of the difference in __________.
Antworten
-
Solar load
-
Sensible heat
-
Humidity
-
Convection currents
Frage 2
Frage
A homeowner plans to build a house out in Las Vegas, Nevada, in the middle of the desert. It would be in his/her best interest to lower the "solar load," to locate most of the windows on the __________.
Antworten
-
west side of the house
-
east side of the house
-
north side of the house
-
south side of the house
Frage 3
Frage
The solar load on a structure is the heat gain resulting from the __________.
Antworten
-
heat from the surrounding air conducted through the materials of the structure
-
air infiltration
-
heat from the radiation from the sun
-
dry-bulb inside the structure
Frage 4
Frage
More than one evaporator coil circuit is used when __________.
Antworten
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a slant coil is at an angle more than 60°
-
the evaporator is located outside the conditioned area
-
there would be excessive refrigerant pressure drop in the coil circuit
-
a distributor would not be practical
Frage 5
Frage
A popular material combination used in air conditioning evaporators and condensers is __________.
Antworten
-
copper tube-copper fin
-
copper tube-stainless steel fin
-
aluminum tube-aluminum fin
-
copper tube-aluminum fin
Frage 6
Frage
In reciprocating and scroll type motor-compressor assemblies, the motor is cooled by __________.
Antworten
-
liquid refrigerant by-passed from the liquid line
-
discharge gas from the compressor
-
suction gas returning to the compressor
-
air over the shell of the assembly
Frage 7
Frage
In rotary type motor-compressor assemblies, the motor is cooled by ____.
Antworten
-
discharge gas from the compressor
-
liquid refrigerant by-passed from the liquid line
-
air over the shell of the assembly
-
suction gas returning to the compressor
Frage 8
Frage
A dirty condenser coil can lead to ____.
Antworten
-
increased efficiency
-
reduced efficiency
-
increased heat transfer
-
increased subcooling
Frage 9
Frage
High efficiency condensers ____.
Antworten
-
are located in separate cabinets
-
have stainless steel coils
-
have more surface area than standard condensers
-
can withstand higher pressures than standard condensers
Frage 10
Frage
The package air-conditioning system is _____ than the split system because it is completely factory assembled and charged with refrigerant.
Antworten
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less efficient
-
slightly less efficient
-
slightly quieter
-
more efficient
Frage 11
Frage
On a package air conditioning system, which refrigerant lines must be field installed?
Antworten
-
discharge and suction
-
discharge and liquid
-
liquid and suction
-
No lines need to be installed
Frage 12
Frage
On a split air conditioning system with a remote condensing unit, which refrigerant lines must be field installed?
Antworten
-
liquid and suction
-
discharge and suction
-
No lines need to be installed
-
discharge and liquid
Frage 13
Frage
The air temperature of the air off an evaporative cooler is ____.
Antworten
-
cooler than the entering air
-
made up of sensible heat only
-
a constant 32 degrees
-
the same as the entering air
Frage 14
Frage
The humidity difference in the 2 different locations (different parts of the country) must be accounted for in the conditioning equipment choice.
Antworten
- True
- False
Frage 15
Frage
The all-aluminum coil has a higher heat transfer rate than the standard copper tube-aluminum fin coil.
Antworten
- True
- False
Frage 16
Frage
Leaks in all-aluminum coils are easier to repair than the standard copper tube-aluminum fin coil.
Antworten
- True
- False
Frage 17
Frage
Equipment will perform at it’s best efficiency when running at full load.
Antworten
- True
- False
Frage 18
Frage
If a residential split air conditioning system has a compressor equipped with a start capacitor and relay, it is probably using a thermostatic expansion valve as a metering device.
Antworten
- True
- False
Frage 19
Frage
The supply duct portion of an air handling system needs to be insulated when run through an unconditioned space.
Antworten
- True
- False
Frage 20
Frage
The return duct portion of an air handling system never needs to be insulated.
Antworten
- True
- False
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