单项选择题
A.sudden evaporation of wax crystals in the lubricant
B.sudden evaporation of entrapped air in the lubricant
C.release of refrigerant from the oil/refrigerant mixture
D.release of dissolved lubricant from the refrigerant
单项选择题 One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the （）.
单项选择题 Which of the following statements is correct concerning a typical shipboard multi-coil refrigeration system?（）
单项选择题 The basic function of the centrifugal pump impeller is to （）.