4-H Pygmy Goat Showmanship Practice Exam

What is the primary function of the thermostatic expansion valve (TXV) in a refrigeration system?

To control compressor speed To maintain a constant evaporator pressure To maintain a constant superheat at the evaporator outlet To condense the refrigerant

Correct Answer:

To maintain a constant superheat at the evaporator outlet

Explanation:

A TXV regulates the flow of liquid refrigerant into the evaporator to maintain a constant degree of superheat at the evaporator outlet.

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