SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

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In an A2L machinery room that uses the IMC 1106.4 ventilation alternative instead of Class I, Division 2 wiring, refrigerant detectors shall activate at or below what concentration?

The refrigerant's occupational exposure limit (OEL) only 25 percent of the lower flammability limit (LFL) 50 percent of the LFL 100 percent of the LFL

Correct Answer:

25 percent of the lower flammability limit (LFL)

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