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單項(xiàng)選擇題

If the cause of severe list or trim is off-center ballast，counterflooding into empty tanks will（）.

A.increase the righting moment
B.increase the righting arm
C.increase list or trim
D.decrease list or trim

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單項(xiàng)選擇題

If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.

A.require ballast
B.be down by the head
C.sink
D.float

單項(xiàng)選擇題

For an upright vessel，draft is the vertical distance between the keel and the（）.

A.waterline
B.freeboard deck
C.plimsoll mark
D.amidships section