4673987
Description
Quiz by Neil Revollo, updated more than 1 year ago
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Created by Neil Revollo
over 8 years ago
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|
Question 1
Question
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 __________.
Answer
-
Solar load
-
Sensible heat
-
Humidity
-
Convection currents
Question 2
Question
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 __________.
Answer
-
west side of the house
-
east side of the house
-
north side of the house
-
south side of the house
Question 3
Question
The solar load on a structure is the heat gain resulting from the __________.
Answer
-
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
Question 4
Question
More than one evaporator coil circuit is used when __________.
Answer
-
a slant coil is at an angle more than 60°
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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
Question 5
Question
A popular material combination used in air conditioning evaporators and condensers is __________.
Answer
-
copper tube-copper fin
-
copper tube-stainless steel fin
-
aluminum tube-aluminum fin
-
copper tube-aluminum fin
Question 6
Question
In reciprocating and scroll type motor-compressor assemblies, the motor is cooled by __________.
Answer
-
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
Question 7
Question
In rotary type motor-compressor assemblies, the motor is cooled by ____.
Answer
-
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
Question 8
Question
A dirty condenser coil can lead to ____.
Answer
-
increased efficiency
-
reduced efficiency
-
increased heat transfer
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increased subcooling
Question 9
Question
High efficiency condensers ____.
Answer
-
are located in separate cabinets
-
have stainless steel coils
-
have more surface area than standard condensers
-
can withstand higher pressures than standard condensers
Question 10
Question
The package air-conditioning system is _____ than the split system because it is completely factory assembled and charged with refrigerant.
Answer
-
less efficient
-
slightly less efficient
-
slightly quieter
-
more efficient
Question 11
Question
On a package air conditioning system, which refrigerant lines must be field installed?
Answer
-
discharge and suction
-
discharge and liquid
-
liquid and suction
-
No lines need to be installed
Question 12
Question
On a split air conditioning system with a remote condensing unit, which refrigerant lines must be field installed?
Answer
-
liquid and suction
-
discharge and suction
-
No lines need to be installed
-
discharge and liquid
Question 13
Question
The air temperature of the air off an evaporative cooler is ____.
Answer
-
cooler than the entering air
-
made up of sensible heat only
-
a constant 32 degrees
-
the same as the entering air
Question 14
Question
The humidity difference in the 2 different locations (different parts of the country) must be accounted for in the conditioning equipment choice.
Answer
- True
- False
Question 15
Question
The all-aluminum coil has a higher heat transfer rate than the standard copper tube-aluminum fin coil.
Answer
- True
- False
Question 16
Question
Leaks in all-aluminum coils are easier to repair than the standard copper tube-aluminum fin coil.
Answer
- True
- False
Question 17
Question
Equipment will perform at it’s best efficiency when running at full load.
Answer
- True
- False
Question 18
Question
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.
Answer
- True
- False
Question 19
Question
The supply duct portion of an air handling system needs to be insulated when run through an unconditioned space.
Answer
- True
- False
Question 20
Question
The return duct portion of an air handling system never needs to be insulated.
Answer
- True
- False
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