SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

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Many fluorinated refrigerants are heavier than air. In a poorly ventilated machinery room or pit, a large leak is most immediately dangerous because it can:

Raise the oxygen concentration above 25 percent Displace oxygen and asphyxiate occupants; oxygen-deficient atmospheres are those below 19.5 percent oxygen Convert automatically to a nontoxic gas Only affect people standing on ladders, never people at floor level

Correct Answer:

Displace oxygen and asphyxiate occupants; oxygen-deficient atmospheres are those below 19.5 percent oxygen

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