单项选择题

The refrigeration compressor in a water cooled refrigeration system is short cycling on the high pressure cutout switch， One reason for this could be the （）.

A.system is low on refrigerant
B.high pressure cutout switch is improperly adjusted
C.discharge valves are leaking slightly
D.discharge valves are leaking excessively

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单项选择题

Excessively low air pressure occurring in the intercooler of a reciprocating air compressor is caused by（）.

A.leaky discharge valves on the LP cylinder
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单项选择题

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单项选择题

If a refrigeration compressor is short cycling on high head pressure, you should （）.

A.purge the condenser if the waterside is dirty
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C.increase the high pressure cutout setting
D.reduce the cooling water flow