单项选择题
A.increase discharge pressure B.decrease pump capacity C.decrease pump cavitation D.decrease reaction ring clearance
Sweating of the refrigeration system compressor crankca...
单项选择题Sweating of the refrigeration system compressor crankcase is caused by （）.
A.too much superheat B.insufficient superheat C.suction pressure too low D.excessive refrigerant returning to the compressor
Which bearing will carry the load on two small points d...
单项选择题Which bearing will carry the load on two small points diametrically opposite to each other?（）
A.Needle B.Tapered roller C.Roller D.Ball
Refrigeration system compressor crankcase sweating is a...
单项选择题Refrigeration system compressor crankcase sweating is an indication of （）.
A.insufficient lube oil circulating through the system B.excessive circulation of lube oil through the system C.insufficient refrigerant in the system D.an overworked compressor
