單項選擇題In the absence of external forces, the center of gravity of a floating vessel is located directly above the（）.

A.metacenter
B.amidships
C.center of floatation
D.geometric center of the displaced volume


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1.單項選擇題In the stowage of deck cargo, cribbing is（）.

A.placed on deck to support the cargo
B.separation pieces used to keep cylinders upright and steady
C.shims for stowing balded cargo
D.nets placed across the hatch opening to keep the cargo from falling in the hatch

2.單項選擇題In vessel construction, a greater number of watertight bulkheads results in（）.

A.increased capacity to set flooding boundaries
B.decreased capacity to set flooding boundaries
C.reduced compartmentation
D.greater deck load capacity

3.單項選擇題In vessel construction. Beam brackets are triangular plates than join the deck beam to a（）.

A.bulkhead
B.frame
C.stanchion
D.deck longitudinal

4.單項選擇題In vessel construction, beam are transverse girders which provide support to（）.

A.bulkheads
B.deckhouse structures
C.decks
D.vertical frames

5.單項選擇題Inerting means（）.

A.the introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume
B.the introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume
C.the introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo
D.All of the above