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

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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

单项选择题

When two oil separators are working in series, they should work with （）

A.both as clarifiers
B.first one as clarifiers, second one as purifier
C.both as purifiers
D.first one as purifier, second one as clarifier