單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

A.leaky discharge valves on the LP cylinder
B.leaky discharge valves on the HP cylinder
C.insufficient intercooler cooling
D.low ambient air pressure

單項(xiàng)選擇題

Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.

A.one size larger than the pump discharge nozzle
B.the same size as the pump discharge nozzle
C.one size smaller than the pump discharge nozzle
D.installed with a short radius elbow at the pump

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 （）.

你可能感興趣的試題

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

Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.

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 （）.