NATE Industry Competency Exam: Commercial Refrigeration Maintenance Exams
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8. NATE Industry Competency Exam: Commercial Refrigeration With the condensing pressure and compressor speed remaining constant, a decrease in suction pressure will cause a(n): An indication o... f non-condensable gas in a refrigeration system is significantly: An automatic expansion valve controls refrigerant flow to an evaporator by maintaining a constant: What is the approximate compression ratio of a compressor operating at 35 psig suction pressure and 135 psig discharge pressure? The BTUs rejected at the condenser are always greater than the heat absorbed in the evaporator because: A unit cooler is inspected and found to be completely iced up. The heaters and defrost timer are found to be working properly. A technician should: [Show More]
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