Refrigeration & Air Conditioning USCG Question #84 (Set 2)

When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, what should be done to compensate for or to correct this situation?

Official USCG Answer & Rule Citation

Correct Answer: Option C — remove some refrigerant from the system

An overcharge fills the condenser internal volume with liquid refrigerant, reducing effective condensing surface area and spiking head pressure. According to standard marine troubleshooting, excess refrigerant must be physically recovered into a certified cylinder to normalize pressures.

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