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

点击查看答案&解析

上一题目录下一题

相关考题

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

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

单项选择题

Operating a rotary pump at speeds in excess of design requirements could cause（）.

A.decreased clearances between rotating parts
B.decreased slippage to the suction side of the pump
C.air binding in the discharge ports
D.erosion and excessive wear