SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

Noncondensable gas (usually air) trapped in a condenser will typically:

Lower head pressure and increase subcooling Raise head pressure and create a larger-than-normal difference between actual condensing pressure and the pressure that would match the leaving-condenser temperature Cause the crankcase heater to fail Convert POE oil into mineral oil

Correct Answer:

Raise head pressure and create a larger-than-normal difference between actual condensing pressure and the pressure that would match the leaving-condenser temperature

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