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單項(xiàng)選擇題

Check value is used to control （）

A.direction of oil flow
B.back pressure of return oil
C.bypass of filter
D.high pressure overflow

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單項(xiàng)選擇題

（）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

單項(xiàng)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