
Unit 24: Expansion Devices
Authored by Laverne Chambers
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University
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Expansion Devices
Divide the high and low sides of the refrigeration system
Meter the correct amount of refrigerant to the evaporator
Installed in the liquid line at the inlet of the evaporator
all of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The following is not an example of an expansion device
Automatic expansion valve (AXV)
Thermostatic expansion valve (TXV)
Fixed bore (capillary tube)
Rotary expansion valve (RXV)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is superheat necessary in a TXV?
Superheat ensures that no liquid refrigerant leaves the evaporator.
Superheat makes the condenser compress refrigerant.
Superheat ensures that the refrigerant boils.
Superheat is not necessary in a TXV.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the components of a TXV
Sensing bulb and transmission tube
Diaphragm
Needle and Seat
Spring
All of the above
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The valve body is made out of:
Aluminum
Brass or Stainless Steel
Copper
Iron
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The Diaphragm
Moves the needle in and out of the seat in response to system load changes
Made of thin, flexible stainless steel
Located at the top of the valve
All of the above
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The greater the pressure difference across the needle and seat, the _____________ the amount of flow through the valve.
lesser
greater
same
The pressure across the needle and seat does not affect the amount of flow through the valve.
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