單項選擇題A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from().

A.filling completely
B.developing free surface
C.developing free surface moment
D.collapsing


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1.單項選擇題A virtual rise in the center of gravity of a ship may be caused by().

A.filling a partially filled tank
B.using fuel from a pressed fuel tank
C.emptying a partially filled tank
D.transferring pipe from the setback area to the pipe rack

2.單項選擇題A vessel is equipped with cross-connected deep tanks. In which situation should the cross-connection valve be closed?().

A.The tanks lie above the waterline and are filled
B.The tanks are partially filled with dry cargo
C.The tanks are partially filled with liquid cargo
D.The tanks are filled and lie below the waterline

3.單項選擇題A tankerman who permits or causes oil to go into a navigable waterway may be punished federally by().

A.fine
B.imprisonment
C.suspension or revocation of tankerman's document
D.All of the above

4.單項選擇題A tank which is NOT completely full or empty is called().

A.pressed
B.slack
C.inertial
D.elemental

5.單項選擇題A tank vessel transferring non-flammable hazardous cargo in bulk must display warning signs. These signs must().

A.be visible from both sides and from forward and aft
B.indicate NO SMOKING
C.be displayed only while transferring cargo and fast to a dock
D.use black lettering on a white background