单项选择题

A salinity indicator is used to determine the （）.

A.cause of salt contamination
B.location of salt water contamination
C.chemical makeup of feed-water
D.level of alkalinity in condensate

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单项选择题

A.refrigerant overcharge
B.overfeeding by the expansion valve
C.a restricted suction strainer
D.due to short cycling of the compressor

单项选择题

A.capacity will increase
B.capacity will decrease
C.suction pressure will increase
D.suction pressure will decrease

单项选择题

A.hydraulic
B.electric
C.steam
D.diesel