单项选择题
A.capacity of 0% B.efficiency of 100% C.internal slippage of 0% D.shut off horsepower rating of 100%
Condensate formed within the first-effect tube nest of ...
单项选择题Condensate formed within the first-effect tube nest of a double-effect,low pressure evaporator, is removed by a （）.
A.series of baffles B.crossover pipe C.condensate separator D.drain pump
The temperature of a refrigerant gas is the highest （）....
单项选择题The temperature of a refrigerant gas is the highest （）.
A.at the compressor discharge B.at the compressor suction C.in the expansion valve D.in the receiver
Which of the listed pressure control valves would be us...
单项选择题Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）
A.Pressure-reducing valve B.Unloading valve C.Counterbalance valve D.Pressure-relief valve
