Question 151Refrigeration/AC - 1st Asst/Chief70% to pass
Concerning the operation of refrigeration systems, frosting or sweating of a liquid line is usually indicative of what condition?
AI Explanation
The correct answer is D) a liquid line restriction.
Frosting or sweating of a liquid line is usually indicative of a restriction in the liquid line, which causes the refrigerant to undergo a pressure drop. This pressure drop results in the refrigerant cooling below the dew point, causing condensation or frosting on the liquid line.
The other answer choices are incorrect because:
A) Proper cooling would not cause frosting or sweating on the liquid line.
B) High relative humidity would not directly cause a liquid line restriction.
C) Refrigerant contamination with moisture would not necessarily cause a liquid line restriction.
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