單項(xiàng)選擇題Stable equilibrium for a vessel means that the metacenter is（）.

A.at a lower level than the baseline
B.on the longitudinal centerline
C.higher than the center of gravity
D.at amidships


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1.單項(xiàng)選擇題Ship’s officers should check every cargo compartment after it is filled with bulk grain to ensure（）.

A.all lighting circuits are energized
B.all void spaces are filled
C.the correct grade of cargo has been loaded
D.the heavier grade is in the lower hold

2.單項(xiàng)選擇題Reinforcing frames attached to a bulkhead on a vessel are called（）.

A.side longitudinals
B.intercostals
C.stiffeners
D.brackets

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題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