單項(xiàng)選擇題

Where are the zinc plates located?（）

A.saltwater side of the condenser
B.refrigerant side of the condenser
C.in the evaporator coils
D.in the suction strainer

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單項(xiàng)選擇題

The device used for low-pressure control and high-pressure cutout on a compressor is called a（）

A.cutout
B.pressure controller
C.controller switch
D.cutout switch

單項(xiàng)選擇題

The purpose of the purge valve at the top of the condenser in a refrigerating system is to（）

A.remove any air that may accumulate in the system
B.take out unpleasant fumes from the refrigerant
C.vent off excess refrigerant in an emergency
D.permit opening the refrigerating system for cleaning and inspecting

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