单选题Pump out No.2 port ballast tank to（）.A keep vessel afloatingB refloat vessel listing to portC make vessel all-rightD bring vessel upright

Permission is kindly ______ about 1000 tons of clean sea water ballast，as and when required for trimming purposes．

A.requested to pump out

B.requested pumping out

C.requesting to pump out

D.requesting pumping out

If you must pump bilges while a vessel is in port，you should pump only ______．

A.If discharge is led to a shore tank or barge

B.During the hours of darkness

C.On the outgoing tide

D.As much as is necessary

Pump out No. 2 port ballast tank to ______.

A.keep vessel afloating

B.refloat vessel listing to starboard

C.make vessel all-right

D.bring vessel upright

The discharge into sea of substances in Category A as defined or of those provisionally assessed as such or ballast water，tank washings，or other residues or mixtures containing such substances shall be ______．

A.Motivated

B.Innovated

C.Prohibited

D.Provided

Permission is requested to pump out about 200 tons of clean sea ballast water for ______ purposes．

A.safe manning

B.trimming

C.avoiding collision

D.preventing pollution

Existing crude oil tankers may，______ being provided with segregated ballast tanks or operating with a cargo tank cleaning procedure using crude oil washing，operate with dedicated clean ballast tanks in accordance with the specified provision of the Regulation．

A.As per

B.In the consequence of

C.In accordance with

D.In lieu of

If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?

A.Pump only if the discharge is led to a shore tank or barge

B.Pump only during the hours of darkness

C.Pump only on the outgoing tide

D.Pump only as much as is necessary

When cleaning a tank by the Butterworth process，you should begin to pump out the slops ______．

A.At the end of the drop schedule

B.When the process is started

C.When the process is finished

D.When the tank is clean