Engineering · Auxiliary — Refrigeration
Excessive moisture in a refrigeration system is harmful chiefly because it can:
- AImprove cooling capacity
- BFreeze at the expansion valve and block refrigerant flow✓ Correct
- CRaise the condenser pressure only
- DLubricate the compressor
Explanation
Water can freeze at the cold expansion valve, blocking flow, and it reacts with refrigerant/oil to form acids and sludge. A filter-drier removes moisture from the system.
Authority: Auxiliary Machinery (USCG engineering topic)
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