你可能感興趣的試題

Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.

A.using a slightly dirty air filter
B.using oil having an excessive viscosity
C.intercooler or after-cooler leaks
D.carrying the oil level higher than normal

單項(xiàng)選擇題

The effect of high vapor superheat in a refrigeration system, is a/an （）.

A.increased capacity of the compressor
B.more efficient operation of the thermal expansion valve
C.decreased capacity of the compressor
D.loss of receiver capacity