单项选择题
A.plastic B.metal C.glass D.paper
How should cargo tank hatches be protected when the ull...
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
How many PPM of the oily water can be pumped out within...
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
How is the Master or operator of a vessel required to k...
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
