HVAC 104

A TXV with a liquid charged bulb is usually limited to ____________.

• high temperature applications

• applications where the ambient air temperature stays above freezing

• applications that have a narrow operating range

• systems that operate below atmospheric pressure

What is the primary function of a TXV in a refrigeration system?

• To control the flow of refrigerant into the evaporator

• To control the temperature of the refrigerant

• To control the pressure of the refrigerant

• To control the humidity of the refrigerant

What could be a possible issue if a TXV is not properly adjusted?

• The refrigerant flow could be too high, causing the evaporator to flood

• The refrigerant flow could be too low, causing the evaporator to starve

• Both A and B

• None of the above

What type of charge is used in a TXV with a gas charged bulb?

• High temperature applications

• Applications where the ambient air temperature stays above freezing

• Applications that have a narrow operating range

• Systems that operate below atmospheric pressure

The spring tension on a TXV is factory set for a predetermined superheat of _____ °F.

• 8-12

• 10-20

• 3-6

• 8-16

Any evaporator that operates below 32°F ______________.

• needs a thermostat

• does not need defrost

• requires some form of defrost

• no such thing

Refrigerant relief valves come in two different types, ___________.

• spring loaded and double tap

• Spring loaded and one time

• fixed or variable

• expensive and cheap

A control that can be used as either a low-charge protection or to control space temperature is a __________.

• High switch

• High pressure switch

• Low switch

• Low pressure switch

What is the function of a refrigerant relief valve in a refrigeration system?

• To control the flow of refrigerant into the evaporator

• To release excess pressure from the system

• To control the temperature of the refrigerant

• To control the humidity of the refrigerant

During an automatic pumpdown, the refrigerant is stored in the ___________.

• Receiver /condenser

• Compressor

• evaporator

• TXV