单项选择题

By regulation，cargo tanks must be inert before and during what operation?（）.

A.Stripping
B.Loading
C.Cleaning
D.Crude oil washing

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单项选择题

By regulation，cargo tank atmosphere must be inert before and during which operation?（）

A.Stripping
B.Loading
C.Cleaning
D.All of the above

单项选择题

An oil tanker，except as provided for otherwise，might discharge certain amount at certain rate of oil or oily mixtures into sea when（）.

A.she is not within a special area
B.she is within a special area
C.she has just departured from a special area
D.she is about to enter a special area

单项选择题

An oil tanker operating with dedicated clean ballast tanks shall be equipped with（），approved by the Administration on the basis of specification recommended by the Organization，to enable supervision of the oil content in ballast water being discharged.

A.an oil content meter
B.an oil checker
C.an analyzer of oil content
D.a mixer of oily water