單項(xiàng)選擇題

The sensing line for the low pressure cutout switch to a refrigeration system is located （）.

A.in the chill box
B.before the receiver
C.on the suction side of the compressor
D.on the discharge side of the compressor

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單項(xiàng)選擇題

Which of the following statements is true concerning any evaporator?（）

A.High conductivity of the distillate indicates distillate salinity is excessive
B.Increasing the absolute pressure of the shell will increase the distillers capacity
C.Mesh separators are used in evaporators to filter the distillate
D.Reducing the brine density will reduce the heat lost overboard

單項(xiàng)選擇題

A knocking sound emitted from an unloaded air compressor is probably caused by （）.

A.damaged intake valves
B.excessively tight mounting bolts
C.insufficient cylinder lubrication
D.a loose piston

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