单项选择题

Structural stress levels in a ship are the sum of loading stresses and stresses due to（）.

A.environmental loads
B.variable loads
C.ballast loading
D.mooring loads

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单项选择题

Keel scantlings of any vessel are greatest amidships because（）.

A.connections between forebody and afterbody are most crucial
B.of maximum longitudinal bending moments
C.of severest racking stresses
D.resistance to grounding is at a maximum amidships

单项选择题

It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by（）.

A.placing bunker on the deck
B.building a stage on which to place the cargo
C.welding steel feet to the deck，on which the cargo is placed
D.erecting vertical pillars under the deck to support the cargo

单项选择题

In heavy weather you notice buckling in the midships deck plating of your vessel. To relieve the strain you could（）.

A.pump fuel oil from midships to the ends of the vessel
B.reduce speed
C.take a course which most eases the vessel
D.All of the above