Refrigeration & Air Conditioning USCG Question #227 (Set 4)

In a refrigeration system that is not protected by a water failure switch, if the cooling water to the condenser fails, what will be the result for protective purposes?

Official USCG Answer & Rule Citation

Correct Answer: Option C — the compressor will shut down by the action of the high-pressure cutout switch

Loss of condenser cooling water causes refrigerant head pressure to spike dangerously. Without a water failure switch, the system relies on the high-pressure cutout safety switch to shut down the compressor before mechanical failure occurs.

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