单项选择题
A.Oil inlet valve opening too quickly B.Oil temperature too high C.Diameter of gravity disc too small D.Viscosity of oil too low
When finish work on the oil separator, you should（）firs...
单项选择题When finish work on the oil separator, you should（）firstly.
A.cut off the power B.cut off the oil inlet C.open guide water valve D.close oil outlet value
When separating the lube oil without additive, it is us...
单项选择题When separating the lube oil without additive, it is usually cleaned with hot water; the aim is to remove （） from it.
A.acid B.sludge C.mechanical impurity D.salinity
The separating effect of oil separator is not very good...
单项选择题The separating effect of oil separator is not very good, the reason may be（）
A.too little seal water B.improper gravity disc C.oil discharging pump not working very well D.low water level of the working water
