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Air Conditioning Systems Unit 36 Test

Terms in this set (22)

In rotary type motor-compressor assemblies, the motor is cooled by ____.
The correct answer is: discharge gas from the compressor
On a package air conditioning system, which refrigerant lines must be field installed?
The correct answer is: No lines need to be installed.
More than one evaporator coil circuit is used when ____.
The correct answer is: there would be excessive refrigerant pressure drop in the coil circuit
In reciprocating and scroll type motor-compressor assemblies, the motor is cooled by ____.
The correct answer is: suction gas returning to the compressor
High efficiency condensers ____.
The correct answer is: have more surface area than standard condensers
Equipment will perform at it's best efficiency when running at full load.
The correct answer is 'True'
The humidity difference in the 2 different locations (different parts of the country) must be accounted for in the conditioning equipment choice.
The correct answer is 'True'.
The all-aluminum coil has a higher heat transfer rate than the standard copper tube-aluminum fin coil.
The correct answer is 'False'.
Under what conditions would a package air-conditioning system need to be charged?
The correct answer is: both b and c
Leaks in all-aluminum coils are easier to repair than the standard copper tube-aluminum fin coil.
The correct answer is 'False'.
The air temperature of the air off an evaporative cooler is ____.
The correct answer is: cooler than the entering air
On a split air conditioning system with a remote condenser, which refrigerant lines must be field installed?
The correct answer is: discharge and liquid
On a split air conditioning system with a remote condensing unit, which refrigerant lines must be field installed
The correct answer is: liquid and suction
When exposed to salt air, the material combination used in air conditioning evaporators and condensers may be ____.
The correct answer is: copper tube-copper fin
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.
The correct answer is 'True'.
The most popular material combination used in air conditioning evaporators and condensers is ____.
The correct answer is: copper tube-aluminum fin
The return duct portion of an air handling system never needs to be insulated.
The correct answer is 'False'.
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 ____.
The correct answer is: north and south sides of the house
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 ____.
The correct answer is: humidity
A dirty condenser coil can lead to ____.
The correct answer is: both b and c
The supply duct portion of an air handling system needs to be insulated regardless of its location.
The correct answer is 'True'.
The solar load on a structure is the heat gain resulting from the ____.
The correct answer is: heat from the radiation from the sun
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