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單項選擇題

（）can not cause oil flow from water outlet of self-cleaning separator.

A.Oil temperature too high
B.Diameter of gravity disc too large
C.Oil temperature too low
D.High level tank out of water

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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

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