单项选择题
A.release B.absorb C.develop D.regenerate
Refrigerant entering the compressor of a refrigeration ...
单项选择题Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
A.Sub-cooled liquid B.Sub-cooled vapor C.Superheated vapor D.Liquid
The heat removed from the refrigerant in the condenser ...
单项选择题The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）
A.latent heat of expansion B.sensible heat of condensation C.heat of compression D.all of the above
An important consideration in selecting a lubricating o...
单项选择题An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）
A.have a high viscosity index B.mix readily with refrigerant C.have a high freezing point D.have a low pour point
