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Commercial Refrigeration Certification Exam with Questions and Answers

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2025/2026 Written for academic year
Institution Commercial Refrigeration
Module Commercial Refrigeration
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Commercial Refrigeration Certification Exam with Questions and Answers Low temperature refrigeration applications, other than ice makers, will normally provide box temperatures of: A. 0°F to 32°F B. 0°F to -20°F C. -10°F to 32°F D. -40°F to 0°F ANSWER A. 0°F to 32°F What is the purpose of an oil separator? A. To capture oil and prevent it from traveling throughout the system. B. To clean the oil and separate the refrigerant from it. C. To filter all of the oil leaving the evaporator. D. To prevent evaporator freeze up. ANSWER A. To capture oil and prevent it from traveling throughout the system. Blended refrigerants should be charged into a running system: A. as a vapor into the high side. B. as a liquid, through a throttling valve into the low side. C. as a liquid through a throttling valve into the high side. D. as a vapor into the low side. ANSWER B. as a liquid, through a throttling valve into the low side.

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