单项选择题

Progressive flooding on a ship is controlled by securing watertight boundaries and（）.

A.transferring drill water
B.dumping bulk materials
C.pumping out flooded compartments
D.evacuating the unit

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单项选择题

On a vessel，the keel is the primary strength member of the lower hull form in which direction?（）.

A.transverse
B.diagonal
C.longitudinal
D.vertical

单项选择题

On a bulk chemical carrier，water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with the chemical called（）.

A.acrylic acid
B.benzene
C.oleum
D.vinyl toluene

单项选择题

Oceangoing dry bulk cargo vessels over 1000 GT must have approved combination-type fire nozzles at all（）.

A.fire stations aboard the vessel，except for those in open deck areas weatherdeck and cargo hold fire stations
B.interior fire stations
C.engine room fire stations
D.all of the above