A.cut off the power
B.cut off the oil inlet
C.open guide water valve
D.close oil outlet value
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A.acid
B.sludge
C.mechanical impurity
D.salinity
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
A.100%
B.80%
C.1/2
D.1/3
A.100%
B.1/2
C.1/5
D.1/3
A.seal water supply be cut off
B.make up water supply be cut off
C.oil outlet valve closed or not open sufficiently
D.the flow rate of oily water is too much
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