A.plasticB.metalC.glassD.paperIf Annex V to MARPOL 73 7……

单项选择题How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）.

A.With gooseneck vents
B.With warning signs
C.With flame screens
D.With pressure-vacuum relief valves

单项选择题How many PPM of the oily water can be pumped out within 12 miles along the China coast line?（）.

A.at least 15 PPM
B.about 15 PPM
C.up to 15 PPM
D.no less than 15 PPM

单项选择题How is the Master or operator of a vessel required to keep the crew informed of the regulations concerning the discharging of garbage overboard?（）.

A.Give each crewmember a copy of ANNEX V of MARPOL
B.Call an all hands meeting before sailing
C.Keep placards prominently posted
D.Have each person read and sign a copy of the regulations

单项选择题Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.

A.bacteria
B.moulds
C.yeasts
D.seals

单项选择题Before operating a non-oceangoing ship greater than 100 gross tons it must have a fixed piping system to discharge oily mixtures ashore. This system must include（）.

A.approved oily-water separating equipment
B.a fixed or portable containment system at the shore connection
C.a spare pump in case the main pump is inoperative
D.at least one outlet accessible from the weather deck