单项选择题
A.finished joints B.welded joints C.ground joints D.soldered joints
If the temperature in the icebox is too high, the troub...
单项选择题If the temperature in the icebox is too high, the trouble could be（）
A.a clogged scale trap B.air in the system C.automatic controls not functioning properly D.insufficient cooling water to the condenser
Air or noncondensable gas is removed from a refrigerati...
单项选择题Air or noncondensable gas is removed from a refrigeration system by a （）
A.separating chamber B.system of baffles C.purge valve D.vacuum reducing valve
Where are the zinc plates located?（）A.saltwater side of...
单项选择题Where are the zinc plates located?（）
A.saltwater side of the condenser B.refrigerant side of the condenser C.in the evaporator coils D.in the suction strainer
