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
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相关考题
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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 -
单项选择题
When separating lube oil separator, the optimal separating quantity is（）of the rated quantity on name plate.
A.100%
B.1/2
C.1/5
D.1/3 -
单项选择题
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
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
