单项选择题
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
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相关考题
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单项选择题
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 -
单项选择题
The separating effect of oil separator is not very good, the reason may be（）
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 -
单项选择题
When separating fuel oil in oil separator, the separating quantity is（） of the real quantity.
A.100%
B.80%
C.1/2
D.1/3
