单项选择题

A.open and individual tank valves openB.open and the in……

In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.

A.open and individual tank valves open
B.open and the individual tank valves closed
C.closed and the individual tank valves closed
D.closed and the individual tank valves open

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热门试题

单项选择题If you are fighting a fire below the main deck of your vessel，which action is most importantconcerning the stability of the vessel? （）

A.Shutting off electricity to damaged cables
B.Pumping fire-fighting water overboard
C.Maneuvering the vessel so the fire is on the lee side
D.Removing burned debris from the cargo hold

单项选择题If a leak occurred while loading diethylenetriamine，the chemical data guide indicates you would smell an odor similar to（）.

A.ammonia
B.rotten eggs
C.gasoline
D.None of the above

单项选择题Hoses used for cargo transfer operations must be tested and inspected at specified intervals by（）.

A.a representative of the Captain of the Port
B.the operator of the vessel or facility
C.a representative of the National Cargo Bureau
D.low inert gas temperature

单项选择题Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon（）.

A.cargo pump failure
B.blower failure
C.deck seal low water level
D.low inert gas temperature

单项选择题During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.

A.150 millimeters of water pressure
B.125 millimeters of water pressure
C.100 millimeters of water pressure
D.75 millimeters of water pressure