單項選擇題

（）can cause oil flow from water outlet of a separator.

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

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單項選擇題

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

單項選擇題

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

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