One cause of high head pressure occurring in a refrigeration system can be （）.<br>A:insufficient cooling water flow to the condenser<br>B:a low refrigerant charge in the system<br>C:the liquid valve is open too much<br>D:high evaporator superheat

One cause of high head pressure occurring in a refrigeration system can be （）.
A:insufficient cooling water flow to the condenser
B:a low refrigerant charge in the system
C:the liquid valve is open too much
D:high evaporator superheat

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