单项选择题
The Emergency Position Indicating Radio beacon on a cargo vessel must be stowed（）.
A.in an inside passageway
B.in an approved bracket
C.so that it is accessible from the bridge of the vessel
D.so that it will float free if the vessel sinks
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单项选择题
The deck water seal of the inert gas system（）.
A.cools the inert gas and prevents soot from entering the cargo tanks
B.acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zone
C.prevents the backflow of hydrocarbon gasses into nonhazardous areas
D.relieves sudden large overpressures in the system -
单项选择题
The color of the signal flare sent up by a submarine about to surface due to an emergency condition within the submarine is（）.
A.green
B.red
C.white
D.yellow -
单项选择题
The approval period for a shipboard Oil Pollution Emergency Plan expires after（）.
A.two years
B.three years
C.four years
D.five years
