单项选择题
A.direction of oil flow B.back pressure of return oil C.bypass of filter D.high pressure overflow
（）can cause oil flow from sludge outlet of self cleanin...
单项选择题（）can cause oil flow from sludge outlet of self cleaning separator.
A.Too much sludge accumulated in separator bowl B.Diameter of gravity disc too large C.High level tank lack of water D.Oil input too rapidly
（）can not cause oil flow from water outlet of self-clea...
单项选择题（）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
（）can cause oil flow from water outlet of a separator.A...
单项选择题（）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
